I wrote the 3 wire mode so the 3-wire valve can be driven as the manufacturer intended. JamesMS3Pro Ultimate Configurable Inputs/ Outputs: 10 channel 4:1 or 8:2 programmable peak and hold injector outputs. General Tech Forums. there are some other controllers that. 2. I also have a Mustang 91 with T5 transmission and would like to use traction control feature. Use with MS3X Expansion board or other sequential device Just like a short run of the MS3X harness, but with no DB37 connector. 8′ MegaSquirt Wiring Harness for MS3X. 0 mainboard. 49 38NPT-Bung_A: Aluminum bung for. There are 3 or 4 MS side harnesses that are about 14" long, they all come from the MS3X pigtails and go to those gray multiplugs. These apply to the first generation MS3Pro, MS3Pro Ultimate, and MS3Pro EVO. I have some questions as I am hooking up the wiring. 6 conversion. 2) MS3 Sensor Ground PIN 7 Not connected at this time since no TPS, IAT, Coolant, O2's are connected. Add to cart. MS3X + 4 bar mapsensor + harness. Using FIDLE and Idle will certainly be ok with the V3. Ground – run the ground wire from the box to the corresponding injector. I have the m50 cam position sensor installed as form my understanding this is the one megasquirt can read, and I have an m44 crank sensor installed. It is capable of controlling sequential injection on engines up to 8 cylinders, or semi-sequential up to 16 cylinders, combined with direct fire ignition for. Memories: '68 912, '72 911T, '80 911SC, '84 911,. 5 out of 5 $ 114. 0 engine in my 1988 Mustang that had a 4 cylinder previously. This MS3x Plug and Play setup offers much more than your standard EFI control. 3) MS3 Cam Input (Dual VR v2. 57 board with MS3X board. 1A) internally wired to MS3 Main Connector 27 IAC1B Blue/Red . Buy their pre assembled wiring harness to make it crazy simple. harness side) when showing db37 pinout at all times. 0 is an ECU based on Megasquirt-3 technology, consisting internally of an MS3 card and an MS3X expansion card installed on a through-hole DIY V3. Boscobel, WI 53805. I have a couple questions I have some resistors to be able to run TFI as well as the ms3x card so I can easily run my PWM IAC and my A/C. 1) MS3 Main board 15-19 grounds connected to engine block, MS3X wire harness not connected at this time. 2. I have a couple questions I have some resistors to be able to run TFI as well as the ms3x card so I can easily run my PWM IAC and my A/C. I even pulled the Ms out and made sure the jumper was installed for the cam input. MegaSquirt MS3X Wiring Bundle - sequential fuel injection and ignition (Dual Stage Nitrous, 2nd O2 Sensor, Boost/Launch Control, etc) 23" LongMs3 wiring diagram ms3x tracking gauge issues down help megasquirt questions grounding question miata o2 turbo fuel reply miataturbo portsWideband aem ms3 canbus pnp 2001 straightforward helpful Wiring diagram megasquirt sensor ms2 ms3 crank position harness diyautotune fc db37 ms1 switch work signal rpm problem thumbnail. IMO it's strange why the stock MS3X wiring from DIY Autotune does NOT have shielded CAM-wiring as standard. This only applies to the MS3X outputs (or on an MS3-Pro); the LED spark outputs use the same pattern as MS2/Extra so as to make it easier when upgrading from MS2 to MS3. To start viewing messages, select the forum that you want to visit from the selection below. MegaSquirt MS3X Wiring Pigtail – Length = 24″. The spark wires might be custom or stock. x card will need to be able to manage a 1992 f150 4wd 351w with MAP efi? also i see diyauto tune sells wires for the ms wiring harness that is 20 gauge. -. I am hoping to test fire my car this week. 99. Top. Some MS3X harnesses don't include shielded wire on their trigger input. Add. Pin 9 - Green / White. ( 14 questions) 5 out of 5 based on 8 customer ratings. Connect it to pin 24 on the Megasquirt main board, or the Tach pin on the relay board. x card will need to be able to manage a 1992 f150 4wd 351w with MAP efi? also i see diyauto tune sells wires for the ms wiring harness that is 20 gauge. I've also tried the nitrous in. I connected my "PWR" grounds from the LS1 coils to the engine block on a short run of wire to keep them out of the wire loom. Hardware manual covering specific wiring and configuration of your Megaquirt MS3X/V30 ECU. MS3 Pro Plug and Play for 04-05 Mazda Miata Mazdaspeed Miata. Post by shiftin04 » Thu Jul 08, 2021 3:06 pm. 5″ long (including the mounting ears), 4-5/8″ wide, and 2. ModMotorMayhem. DB37 Solder Cup Connector for MS3X $ 8. The cam sensor will go to the MS3X db37 but the ground. Filter (0 active) Filter by. You can use it with OEM harnesses or wiring from other sources, and use it with any ECU. You will be using the MS3X Ignition Drivers NOT the Mainboard drivers. 1A) internally wired to MS3 Main Connector 27 IAC1B Blue/Red . -. I have recently purchased the ms3x 3. 99. I have a couple questions I have some resistors to be able to run TFI as well as the ms3x card so I can easily run my PWM IAC and my A/C. MS3 wiring harness colours - standardisation. SKU: MS3X-Hrn Categories: MegaSquirt 3, MegaSquirt 3, Wiring Harnesses & Wire Bundles Tags: 3, 357, harness, iii, mega, megasquirt, megasquirt3, ms3, ms3x, squirt, wire, wiring Brand. MegaSquirt Relay Cable. 1) MS3 Main board 15-19 grounds connected to engine block, MS3X wire harness not connected at this time. . The versatile MicroSquirt with 30″ Harness: Standalone Engine Management System, Transmission Controller or CAN I/O Expansion Module- Version 3. 00. $23. 57 is an ECU based on Megasquirt-3 technology, consisting internally of an MS3 card and an MS3X expansion card installed on a surface mount V3. Wiring the engine harness to the MS harness has been pretty clear except for some uncertainties with the CKP input and what our setup is capable of. Injector wires are labeled, and are on the MS3x plug. Wiring Harness Adapter Guide For E30 M60 And Obd 1 M62 Swap Pinout A Cheap Way Of Getting X20 C101 Connectors Rts Your Total Bmw Enthusiast. The BMW E36 is a masterpiece of attention to detail. Well, apparently I’m not too brave lol. My formula SAE team recently acquired an MS3X ecu which we want to start running on our CBR 600 f4i, and I'm in the process of building the wiring harness and hooking up electronics. 05-19-2017, 03:45 PM. 25 IATwPiggy: Intake Air Temperature Sensor $9. ) How small or large this is depends on the current flowing and the resistance of the ground wires. I need some advice from the group. MegaSquirt-I Relay Cable (if you’re using the relay board and cable, you don’t need the standard MSHarness12, see note in product description)We carry 8′ wiring harnesses for $83 that are designed to be adapted to any engine. 8′ MegaSquirt Wiring Harness for MS3X. Use the MS3X pull up jumper for the. 3) MS3 Cam Input (Dual VR v2. 0 ratings 0% found this document useful (0 votes) 40 views. now can i use the spare 4 fuel or. as Cam sensors with VR are shielded from stock. All that looks good, so I’m going to get a new sensor tomorrow. And used MS harness wire #30 to control the IAC valve. 4. MS3Pro Ultimate Standalone Engine Management System w/ Harness. I have a couple questions I have some resistors to be able to run TFI as well as the ms3x card so I can easily run my PWM IAC and my A/C. 8′ MegaSquirt Wiring Harness for MS3X. 4 Crank / Cam Inputs; 2. 60. Jacob Hernandez. Description. 57 with wiring harness for 00-04 3rz-fe turbo plug and play « on: Oct 26, 2016, 03:56:33 PM » I have for sale a Megasquirt Stand alone ECM MS3X v3. . Wiring ms3x megasquirt ms3Ms3 pro ultimate wiring diagram Ms3pro a/c control wiringMegasquirt ms3x wiring diagram. MegaSquirt MS3X Wiring Harness – 8 feet 8′ of TXL High temp automotive grade wire. 8′ of TXL High temp automotive grade wire. The versatile MicroSquirt with 8′ Harness: Standalone Engine Management System, Transmission Controller or CAN I/O Expansion Module- Version 3. Color coded wiring with. 1) MS3 Main board 15-19 grounds connected to engine block, MS3X wire harness not connected at this time. Found it relatively cheaply at 4K. 1A) internally wired to MS3 Main Connector 27 IAC1B Blue/Red . 24″ of TXL High temp automotive grade wire. 99. . SAYS IF HALL SENSOR. (Speed Density only. Color coded wiring with labeling printed on the wire every 6 inches -- no paper tags here! All wiring is pre-crimped (NOT solder cupped!) to the DB37 Heavy d. SAYS IF HALL SENSOR. . 21 the ecu powers on. Powered up my MS3x 3. Wire wiring ms3x g2 sensor forums porsche deleted ground engine should redMegasquirt ms3x wiring harness install pt. 3. 4g63 with weird spark output. once the computer is hooked up to a 12v circuit it works just fine so thankfully I built it right. MegaSquirt 3. There is a recall on us crankps and they sell a wiring harness kit with it. the Foxbody 550-937F kit is $1230 and i think the difference is connectors, but my connectors are not all the same anyway. Wire the distributor’s VR sensor to the HEI module VR inputs. Look foir Pt. MS3 3. MegaSquirt Wiring Harness - 8 Feet Long We've completely redesigned our wire harness to help you get your fuel injection installation right the first time with several new features to help make your installation as easy and reliable as possible:. Made of the same TXL rated automotive grade. 99 DB15 Pigtail Harness Add for $ 23. The explanation in the manual states that sometimes a coil is necessary. IAC and Ignition wire have been added for MS-I / MS-2 use or MS-3 Primary Harness Use 8′ of TXL High temp automotive grade wire. Our USA-assembled map sensor uses a universal keying that is compatible with pigtails for 1, 2, and 3 bar MAP sensors. For many first-time users, it may be tempting to re-use old connectors and wiring. 57 case, making it significantly taller than the DIYPNP case. 1 Best Practices. x (See the Setting Up manual for more detail on version numbers. Wire to pin 8 for 1G and 2G MS3X connector: pins 2, 3, 8, 12, 17 Wire with your grounds from the mainboard pin 4 Injector F output (cyl 6) Wire to pin 16 for 1G and 2GRe: MS3+MS3X and the EEC-IV adapter board Post by xrattiracer » Sun Mar 28, 2010 5:50 am what exactly would be the point of using a ms3x with the stock ford harness? you would have to add all sorts of extra wires for the extra functions anyway. Color coded wiring with labeling printed on the wire every 6 inches -- no paper tags here! All wiring is pre-crimped (NOT solder cupped!) to the DB37 Heavy d. MS3base/V3. Description. Anyone onto the questions. Add to cart. Everything checks good in the engine harness. That’s it! Using the. for example 35x on second column means 35 pin on ms3x wiring diagram. Regular price2. Not including the connectors, the case itself is 1. Get the serial comms set up. Engine Management Systems. Description. 2003 Mustang 2V stock harness splice, MS3X v3. Hi All, I just recieved my MS3x and wiring harness yesterday, and have been looking for diagrams to use to wire it in to my car. I purchased an aftermarket harness for it and that wiring was smaller. 2. 2) MS3 Sensor Ground PIN 7 Not connected at this time since no TPS, IAT, Coolant, O2's are connected. Dated: Hardware manual covering specific wiring and 3. Showing: 4 results for Wiring Harness near Victoria, BC. 99. 3. I am running fully sequential fuel and spark via MS3X. 24″ of TXL High temp automotive grade wire. The R pin is the HEI module’s tach output. This product is manufactured in Gainesville, Georgia, USA. I'm reaching wits end. This is for 1. 12v fused feed- from fuse box powered by the fuel pump relay. Customer leaves one star review because he expected the wire bundle to be 30" long. Connect MAP hose to full vacuum source. 8′ MegaSquirt Wiring Harness for MS3X. Should I split the signal ground wire out of the shield before the MS3X DB37, and route it to its own dedicated pin on the main DB37. . MS3Pro Ultimate Configurable Inputs/ Outputs: 10 channel 4:1 or 8:2 programmable peak and hold injector outputs. Location: Va. 57: Install a 1K resistor in the R57 slot. 500 Hwy 133. MegaSquirt MS3X Wiring Bundle – Length = 8′. Subscribe. Hey Everyone. You don't need that ignition module, you ve COP on your car and you need to find a way to ignite your coils with MS3X spark outputs. A main step in your MS3 Gold Box installation is connecting up the wiring. Been working on my MS3X board for quite a while (if anyone is debating buying the kit vs the pre-built, get the pre-built). Naturally, I have raised these on the MS forum, but there is next. 00. You will also need to connect 330 ohm, 1/4 watt resistors from TPS VREF (pin 26) to both the low resolution signal and the high resolution signal to provide a pull-up in the wiring harness. sjpgoalie. . x card will need to be able to manage a 1992 f150 4wd 351w with MAP efi? also i see diyauto tune sells wires for the ms wiring harness that is 20 gauge. 3. Serving my area. 0 parallel install, full sequential, HPX MAF, Ford Ev6 47lb injectors, COP, custom 8 BIP373 box, E85 pump, teflon lined return style fuel system, 39 lb base fuel pressure, Twin Turbo @ 7lbs boost, Dual 4 port boost solenoids, Dual 14point7 widebands Posted January 28, 2014. I'm tapping into the connector in the tunnel. Engine Management Systems. We are almost done pulling wires in the engine bay at this point. - I assume that the signal from the Vortec distributor goes to the nr 32 wire of the ms3X harness which says that this is for the cam Hall sensor. 57 board, the ms3x wiring harness, 7mgte CPS and am getting decent cam/crank signal(not full sync yet, however I have full sync at crank and up to around 1000rpm, but that's another topic). . 99. Se the following two screen shots. 0 Hardware Manual - Megasquirt UK Official SiteThis manual provides detailed instructions and diagrams for installing and configuring the MS3X/V3. Free Shipping - DIYAutoTune MS3X-Hrn with qualifying orders of $109. ( 4 customer reviews) $ 114. Add to wishlist. 2) MS3 Sensor Ground PIN 7 Not connected at this time since no TPS, IAT, Coolant, O2's are connected. Preassemble and Prepare The Megasquirt MS3/MS3-Pro Harnesses. 12 analog inputs plus built-in MAP, Baro, and internal ECU temp sensor. x card will need to be able to manage a 1992 f150 4wd 351w with MAP efi? also i see diyauto tune sells wires for the ms wiring harness that is 20 gauge. Use these settings in TunerStudio. MegaSquirt 3 ECU with MS3X Expansion. g. Color coded wiring with labeling printed on the wire every 6 inches — no paper tags here! All wiring is pre-crimped (NOT solder cupped!) to the DB37; Heavy duty metal DB37 hood for superior RFI/EMI shielding (no cheap plastic ‘metalized’ hoods used on our harnesses) Use with MS3X Expansion board; This is the harness for the MS3X Expansion. Ls1 ecm wiring diagramCommodore vy ls1 vz ecu pcm vx loom outs diagrams efi Ford wiring lincoln idmsvcs tidbits imageservice harnes2002 lincoln ls need wiring diagram for heater. B1 - ECU Ignition Switch:. 70 Subtotal without wideband . Fastest MS powered vehicle on the planet ! 6. 0 mainboard with MS3X as shown above running firmware MS3 1. 24″ of TXL High temp automotive grade wire. 5 out of 5. Hardware. 57 – The MegaSquirt 3 is a drop in daughter card that greatly expands the MegaSquirt’s functionality. Would 18 gauge be alright to run from the MS. 2 digital outputs. Would 18 gauge be alright to run from the MS. 99. And the newest version of tuner studio. Add to wishlist. Uploaded by Ojeda Orlando. 3) MS3 Cam Input (Dual VR v2. 5 out of 5 $ 114. The MS3Pro measures approximately 8. MegaSquirt Wiring Harness - 8 Feet Long We've completely redesigned our wire harness to help you get your fuel injection installation right the first time with several new features to help make your installation as easy and reliable as possible:. Well at this point between the wiring. Checking my COP wiring with my timing light, it seems that the coil output from MS3x needs to be wired in the following manner. The regular JimStim can test the main board on your MS3. 3 high current digital/pwm outputs. Because of this, we need to replace the unshielded wire with two conductor shielded. 1 Best Practices. 1A) internally wired to MS3 Main Connector 27 IAC1B Blue/Red . 12G main feed and 16G out to the fans. 3. Pins 6, 28, 34 and 55 on the harness side go straight to Earth ground. For a V3. 6 engine with ITBs, COPs, MS3X 2021 Macan S Day job. Matt Cramer -1966 Dodge Dart slant six running on MS3X. 99. by lastermann » Tue Dec 27, 2011 6:27 pm. That will be plenty for a stock boosted engine. Megasquirt MS3X > 3. MegaSquirt MS3X Wiring Harness - 8 feet 8' of TXL High temp automotive grade wire. 1A) internally wired to MS3 Main Connector 27 IAC1B Blue/Red . . 1A) internally wired to MS3 Main Connector 27 IAC1B Blue/Red . At that time pin 2 on the MS3x connector was assigned as 12 VDC. Would 18 gauge be alright to run from the MS. I have a couple questions I have some resistors to be able to run TFI as well as the ms3x card so I can easily run my PWM IAC and my A/C. However, MS3X now has Tach output. the US Shift Pick-4 trans contoller is kinda expensive at $750 for harness and controller. Add to cart. 2 general purpose on/off outputs – can be repurposed as spark outputs with switchable pull ups. one sensor wire is adequate. 1) MS3 Main board 15-19 grounds connected to engine block, MS3X wire harness not connected at this time. 8′ MegaSquirt Wiring Harness for MS3X. 5″ long (including the mounting ears), 4-5/8″ wide, and 2. MegaSquirt MS3X Wiring Harness - 8 feet 8' of TXL High temp automotive grade wire. Add Shielded Cable To MS3X Harness. Length Harnesses, Kit See. I'm less clear on whether its important to run the ground from MS to the engine (and thus back to the battery) or if I can simply take them to the battery via a nearby distribution block. 57 – The MegaSquirt 3 is a drop in daughter card that greatly expands the MegaSquirt’s functionality. 6 digital inputs. Joined: Mon Sep 19, 2011 6:10 pm. The stock wires might work by just looping the extra length of wire-if you can picture that. 99 Quantity Add to cart MegaSquirt MS3X Wiring Harness – 8 feet 8′ of TXL High temp automotive grade wire. 1 ecu that is the vanos motor. 5 out of 5 $ 114. C1, and B1 body harness connectors to get power and the auxiliaries working. 8′ of TXL High temp automotive grade wire. 5 out of 5 $ 114. Color coded wiring with labeling printed on the wire every 6 inches — no paper tags here! Use with MS3X Expansion board or other sequential device. Wire the distributor’s VR sensor to the HEI module VR inputs. Fire up your engine on day one! All wiring is composed of TechFlex woven, self-extinguishing wrapped hi-temp TXL & GXL automotive grade wire. 1 PWM IAC output – can be repurposed as. MegaSquirt MS3X wiring harness Install Pt. 99. 2) MS3 Sensor Ground PIN 7 Not connected at this time since no TPS, IAT, Coolant, O2's are connected. -. I have a couple questions I have some resistors to be able to run TFI as well as the ms3x card so I can easily run my PWM IAC and my A/C. 99. Wiring the engine harness to the MS harness has been pretty clear except for some uncertainties with the CKP input and what our setup is capable of. 57 mainboard as it uses the same driver as the MS3X. 5 4. 1A) internally wired to MS3 Main Connector 27 IAC1B Blue/Red . 0 ECU, which is based on Megasquirt-3 technology and features an MS3 card and an MS3X expansion card on a through hole V3. This version of the documentation applies to: • MS3 on a V3. 00. SAYS IF HALL SENSOR. See the MS3 manual wiring diagram for how to wire it up. Bring the e-fan wire (IAC1A) out to the front of the car around the driver side front relays (between the bumper and rad). My firing order 1,3,7,2,6,5,4,8 SPKA - Coil #1. 2) MS3 Sensor Ground PIN 7 Not connected at this time since no TPS, IAT, Coolant, O2's are connected. I connected the "signal" grounds to the terminal where I ground all of the megasquirt grounds. You may have to register before you can post: click the register link above to proceed. In the idle settings I have set the frequency to 195hz. 00 MS3X357-C_BL: Assembled Megasquirt-III V3. MS3X MegaSquirt 3 with expansion arrives equipped with features surpassing MS2 and MS1 systems, like sequential fuel and spark, 2 step, progressive nitrous, boost control, onboard traction control and much more!. Internal pull up on a V3. MegaSquirt MS3X Wiring Pigtail – Length = 24″. 99. Color coded wiring with labeling printed on the wire every 6 inches — no paper tags here! Heavy duty metal DB37 hood for superior RFI/EMI shielding (no cheap plastic ‘metalized’ hoods used on our harnesses) This is the harness for the MS3X Expansion board. Run this resistor-on-a-wire from the 5 volt terminal in the proto area to the same input pin (SPR1 or PAD7) used in the previous step. 2. 0 ECU for. Number Of Wires: 3. 1) MS3 Main board 15-19 grounds connected to engine block, MS3X wire harness not connected at this time. I'm using 2 shielded 22AWG stranded 2 conductor wires for the CAS, and I'm not quite sure how I should route the 'cam' wire. Megasquirt-3 Setting Up manual PDF WWW. At least that's what the wiring diagram that came with it says. 1. 2) MS3 Sensor Ground PIN 7 Not connected at this time since no TPS, IAT, Coolant, O2's are connected. But my big brain figured to follow MS3x directions and redo the wiring harness. x. MS3Pro Ultimate Standalone w/ LSX drop in Harness. The engine harness is the later 82-83 ZXt style but the distributor end with the round four-prong one-way-fit plug was cut off and the. You may also consider switching to a VW coils, they're logic level and you don't. I'm trying to avoid having a couple of fine wires needing to jump across from the MS3x harness to the MS3 harness. 3) MS3 Cam Input (Dual VR v2. I have a m50 NON-Vanos motor with a Motronic 3. You don't need that ignition module, you ve COP on your car and you need to find a way to ignite your coils with MS3X spark outputs. Megasquirt diagram wiring ms3x ms3 computer honda efi engine wire fuel source iq installation injection [diagram] megasquirt relay board diagram20 beautiful megasquirt wiring diagram Megasquirt relay board harness did own adRelay board mod: 2-wire pwm air valve + electric fan relay. 6 digital inputs. x card will need to be able to manage a 1992 f150 4wd 351w with MAP efi? also i see diyauto tune sells wires for the ms wiring harness that is 20 gauge. Regular price $2,099. DB37 Solder Cup Connector for MS3X $ 8. For input I've tried datalog in, tableswitch, and the other ground switching input that I can't recall at the moment. 57 in car for the first time and am running diagnostics. 3. Setting Up. 99 8' MegaSquirt Wiring Harness for MS3X Add for $ 114. MS3 – Fully assembled and tested, ready to wire in and go! The MegaSquirt 3 (MS3) is ready to support a wide variety of engines out of the box, with the ability to control anything with one to eight cylinders with sequential fuel injection and sequential ‘coil on plug’ ignition, a V12 with semi-sequential fuel and wasted spark ignition, or a four rotor Wankel with separate. MegaSquirt MS3X Wiring Harness - 8 feet 8' of TXL High temp automotive grade wire. MS3/x ground wiring. 0 PCB 42lb/hr Hi-Z inj. I get to installing the MS3X. Would 18 gauge be alright to run from the MS. MegaSquirt MS3X Wiring Harness – 8 feet 8′ of TXL High temp automotive grade wire. Which outputs (A,B,C and D) go to. Add to cart8′ MegaSquirt Wiring Harness for MS3X. MegaSquirt MS3X Wiring Harness – 8 feet8′ of TXL High temp automotive grade wire. MegaSquirt MS3X Wiring Bundle - Length = 23" ~23" of TXL High temp automotive grade wire. 0 0 Hardware Guide General layout for 4-cyl coil-on-plug using LS coils. 57 with MS3X, use the Spark A output on the MS3X board (pin 14). 0 or V3. 00. Would 18 gauge be alright to run from the MS. Wiring the engine harness to the MS harness has been pretty clear except for some uncertainties with the CKP input and what our setup is capable of. 99. ‘Optional’ MegaSquirt Relay Board – Assembled Unit. Customer reviews. Just to note, the motor will be turbo-charged, and I will use my MS3x to control box spark and fuel. 1) MS3 Main board 15-19 grounds connected to engine block, MS3X wire harness not connected at this time. ( 1 question) 5 out of 5 based on 4 customer ratings. 8′ MegaSquirt Wiring Harness for MS3X. 2) MS3 Sensor Ground PIN 7 Not connected at this time since no TPS, IAT, Coolant, O2's are connected. Connect the 12 gauge red fan power wire to a spare terminal on the fuse. The R pin is the HEI module’s tach output. 00. The MS3Pro LSX Series plug and play harness is professionally engineered and easy to install. MegaSquirt MS3X Wiring Bundle – Length = 8′. There is a recall on us crankps and they sell a wiring harness kit with it.