Megasquirt MS3 Pro Evo Flying Lead (/16 Tefzel, White)

v3 · public
Owner yourspec
Wires 65
Length 390'
Updated Aug 14, 2025

Project Description

This project is a flying lead harness for the Megasquirt MS3 Pro Evo. All wire lengths are 8 feet and M22759/16 tefzel. Pins are labeled with connector number and position, A = white connector B = grey connector. Dual use pins are both populated so you should delete the wires you do not plan to use (digital freq 3 and 1)! 

You can copy this project to make changes for your specific project!
Total
$462.30
Wire Marking Wire End 1 Wire End 2
# Qty Name Wire Type Wire Gauge Wire Color Length Mark Text Interval Strip Length Tail Tinning Pin Crimped Connector Strip Length Tail Tinning Pin Crimped Connector
1 1 High current output 1 M22759/16 18 AWG White8' 0" A1 - HCO 1 2.00" 5.100mm AMPSEAL 1.3 (Tin, 770854-1)
2 1 High current output 2 M22759/16 18 AWG White8' 0" A2 - HCO 2 2.00" 5.100mm AMPSEAL 1.3 (Tin, 770854-1)
3 1 Injector J M22759/16 20 AWG White8' 0" A3 - INJ J 2.00" 5.100mm AMPSEAL 1.3 (Tin, 770854-1)
4 1 Injector I M22759/16 20 AWG White8' 0" A4 - INJ I 2.00" 5.100mm AMPSEAL 1.3 (Tin, 770854-1)
5 1 High current output 3 M22759/16 18 AWG White8' 0" A5 - HCO 3 2.00" 5.100mm AMPSEAL 1.3 (Tin, 770854-1)
6 1 Primary trigger 3 Conductor Shielded Tefzel (M27500-22TG3T14) 22 AWG White8' 0" A6 A15 - PRIMARY TRIGGER + 2.00" 45.000mm
1-WHITE Wire 5-1 5.100mm AMPSEAL 1.3 (Tin, 770854-1)
2-BLUE Wire 5-2 5.100mm AMPSEAL 1.3 (Tin, 770854-1)
3-ORANGE Wire 5-3
SHIELD Wire 5-4
7 1 Knock 2 2 Conductor Shielded Tefzel (M27500-22TG2T14) 22 AWG White8' 0" A7 - KNOCK 2 2.00" 45.000mm
1-WHITE Wire 6-1 5.100mm AMPSEAL 1.3 (Tin, 770854-1)
2-BLUE Wire 6-2
SHIELD Wire 6-3
8 1 +5v sensor supply M22759/16 22 AWG White8' 0" A8 - +5V 2.00" 5.100mm AMPSEAL 1.3 (Tin, 770854-1)
9 1 Throttle position sensor M22759/16 22 AWG White8' 0" A9 - TPS 2.00" 5.100mm AMPSEAL 1.3 (Tin, 770854-1)
10 1 Manifold air temperature sensor M22759/16 22 AWG White8' 0" A10 - MAT 2.00" 5.100mm AMPSEAL 1.3 (Tin, 770854-1)
11 1 Coolant temperature sensor M22759/16 22 AWG White8' 0" A11 - CLT 2.00" 5.100mm AMPSEAL 1.3 (Tin, 770854-1)
12 1 Analog input 6 M22759/16 22 AWG White8' 0" A12 - ANALOG 6 2.00" 5.100mm AMPSEAL 1.3 (Tin, 770854-1)
13 1 ECU ground M22759/16 16 AWG White8' 0" A13 - ECU GND 2.00" 5.100mm AMPSEAL 1.3 (Tin, 770854-1)
14 1 PWM idle control M22759/16 20 AWG White8' 0" A14 - PWM IDLE 2.00" 5.100mm AMPSEAL 1.3 (Tin, 770854-1)
15 1 ECU logic ground M22759/16 16 AWG White8' 0" A16 - ECU LOGIC GND 2.00" 5.100mm AMPSEAL 1.3 (Tin, 770854-1)
16 1 Analog input 7 M22759/16 22 AWG White8' 0" A17 - ANALOG 7 2.00" 5.100mm AMPSEAL 1.3 (Tin, 770854-1)
17 1 Sensor ground M22759/16 22 AWG White8' 0" A18 - SENSOR GND 2.00" 5.100mm AMPSEAL 1.3 (Tin, 770854-1)
18 1 Analog input 1 M22759/16 22 AWG White8' 0" A19 - ANALOG 1 2.00" 5.100mm AMPSEAL 1.3 (Tin, 770854-1)
19 1 Analog input 2 M22759/16 22 AWG White8' 0" A20 - ANALOG 2 2.00" 5.100mm AMPSEAL 1.3 (Tin, 770854-1)
20 1 Analog input 3 M22759/16 22 AWG White8' 0" A21 - ANALOG 3 2.00" 5.100mm AMPSEAL 1.3 (Tin, 770854-1)
21 1 Analog input 4 M22759/16 22 AWG White8' 0" A22 - ANALOG 4 2.00" 5.100mm AMPSEAL 1.3 (Tin, 770854-1)
22 1 Analog input 5 M22759/16 22 AWG White8' 0" A23 - ANALOG 5 2.00" 5.100mm AMPSEAL 1.3 (Tin, 770854-1)
23 1 Tach output M22759/16 22 AWG White8' 0" A24 - TACH 2.00" 5.100mm AMPSEAL 1.3 (Tin, 770854-1)
24 1 WBO input M22759/16 22 AWG White8' 0" A25 - WBO 2.00" 5.100mm AMPSEAL 1.3 (Tin, 770854-1)
25 1 Secondary trigger 2 Conductor Shielded Tefzel (M27500-22TG2T14) 22 AWG White8' 0" A26 - SECONDARY TRIGGER 2.00" 45.000mm
1-WHITE Wire 25-1 5.100mm AMPSEAL 1.3 (Tin, 770854-1)
2-BLUE Wire 25-2
SHIELD Wire 25-3
26 1 Fuel pump relay trigger M22759/16 22 AWG White8' 0" A28 - FUEL PUMP RELAY 2.00" 5.100mm AMPSEAL 1.3 (Tin, 770854-1)
27 1 PWM output 2 M22759/16 22 AWG White8' 0" A29 - PWM 2 2.00" 5.100mm AMPSEAL 1.3 (Tin, 770854-1)
28 1 PWM output 3 M22759/16 22 AWG White8' 0" A30 - PWM 3 2.00" 5.100mm AMPSEAL 1.3 (Tin, 770854-1)
29 1 Knock sensor 1 2 Conductor Shielded Tefzel (M27500-22TG2T14) 22 AWG White8' 0" A31 - KNOCK 1 2.00" 45.000mm
1-WHITE Wire 29-1 5.100mm AMPSEAL 1.3 (Tin, 770854-1)
2-BLUE Wire 29-2
SHIELD Wire 29-3
30 1 CAN L M22759/16 22 AWG White8' 0" A33 - CAN L 2.00" 5.100mm AMPSEAL 1.3 (Tin, 770854-1)
31 1 CAN H M22759/16 22 AWG White8' 0" A34 - CAN H 2.00" 5.100mm AMPSEAL 1.3 (Tin, 770854-1)
32 1 ECU switched power M22759/16 16 AWG White8' 0" A35 - +12V ECU PWR 2.00" 5.100mm AMPSEAL 1.3 (Tin, 770854-1)
33 1 Injector A M22759/16 20 AWG White8' 0" B1 - INJ A 2.00" 5.100mm AMPSEAL 1.3 (Tin, 770854-1)
34 1 Injector B M22759/16 20 AWG White8' 0" B2 - INJ B 2.00" 5.100mm AMPSEAL 1.3 (Tin, 770854-1)
35 1 ECU Ground M22759/16 16 AWG White8' 0" B3 - ECU GND 2.00" 5.100mm AMPSEAL 1.3 (Tin, 770854-1)
36 1 Injector C M22759/16 20 AWG White8' 0" B4 - INJ C 2.00" 5.100mm AMPSEAL 1.3 (Tin, 770854-1)
37 1 ECU Ground M22759/16 16 AWG White8' 0" B5 - ECU GND 2.00" 5.100mm AMPSEAL 1.3 (Tin, 770854-1)
38 1 Injector D M22759/16 20 AWG White8' 0" B6 - INJ D 2.00" 5.100mm AMPSEAL 1.3 (Tin, 770854-1)
39 1 ECU Ground M22759/16 16 AWG White8' 0" B7 - ECU GND 2.00" 5.100mm AMPSEAL 1.3 (Tin, 770854-1)
40 1 Injector E M22759/16 20 AWG White8' 0" B8 - INJ E 2.00" 5.100mm AMPSEAL 1.3 (Tin, 770854-1)
41 1 ECU Ground M22759/16 16 AWG White8' 0" B9 - ECU GND 2.00" 5.100mm AMPSEAL 1.3 (Tin, 770854-1)
42 1 Injector F M22759/16 20 AWG White8' 0" B10 - INJ F 2.00" 5.100mm AMPSEAL 1.3 (Tin, 770854-1)
43 1 Injector G M22759/16 20 AWG White8' 0" B11 - INJ G 2.00" 5.100mm AMPSEAL 1.3 (Tin, 770854-1)
44 1 Injector H M22759/16 20 AWG White8' 0" B12 - INJ H 2.00" 5.100mm AMPSEAL 1.3 (Tin, 770854-1)
45 1 Ignition G M22759/16 20 AWG White8' 0" B13 - IGN G 2.00" 5.100mm AMPSEAL 1.3 (Tin, 770854-1)
46 1 Ignition E M22759/16 20 AWG White8' 0" B14 - IGN E 2.00" 5.100mm AMPSEAL 1.3 (Tin, 770854-1)
47 1 Ignition C M22759/16 20 AWG White8' 0" B15 - IGN C 2.00" 5.100mm AMPSEAL 1.3 (Tin, 770854-1)
48 1 Ignition H M22759/16 20 AWG White8' 0" B16 - IGN H 2.00" 5.100mm AMPSEAL 1.3 (Tin, 770854-1)
49 1 Digital frequency input 2 M22759/16 22 AWG White8' 0" B17 - DIGITAL FREQ IN 2 2.00" 5.100mm AMPSEAL 1.3 (Tin, 770854-1)
50 1 ECU Ground M22759/16 16 AWG White8' 0" B18 - ECU GND 2.00" 5.100mm AMPSEAL 1.3 (Tin, 770854-1)
51 1 Digital switched input M22759/16 22 AWG White8' 0" B19 - DIGITAL SW IN 2.00" 5.100mm AMPSEAL 1.3 (Tin, 770854-1)
52 1 Digital switched input 2 M22759/16 22 AWG White8' 0" B20 - DIGITAL SW IN 2 2.00" 5.100mm AMPSEAL 1.3 (Tin, 770854-1)
53 1 Digital frequency input 3 M22759/16 22 AWG White8' 0" B21 - DIGITAL FREQ IN 3 2.00" 5.100mm AMPSEAL 1.3 (Tin, 770854-1)
54 1 Digital frequency input 3 VR 2 Conductor Shielded Tefzel (M27500-22TG2T14) 22 AWG White8' 0" B22 B23 - DIGITAL FREQ IN 3 VR 2.00" 45.000mm
1-WHITE Wire 53-1 5.100mm AMPSEAL 1.3 (Tin, 770854-1)
2-BLUE Wire 53-2 5.100mm AMPSEAL 1.3 (Tin, 770854-1)
SHIELD Wire 53-3
55 1 Ignition F M22759/16 20 AWG White8' 0" B24 - IGN F 2.00" 5.100mm AMPSEAL 1.3 (Tin, 770854-1)
56 1 Ignition B M22759/16 20 AWG White8' 0" B25 - IGN B 2.00" 5.100mm AMPSEAL 1.3 (Tin, 770854-1)
57 1 Ignition D M22759/16 20 AWG White8' 0" B26 - IGN D 2.00" 5.100mm AMPSEAL 1.3 (Tin, 770854-1)
58 1 Ignition A M22759/16 20 AWG White8' 0" B27 - IGN A 2.00" 5.100mm AMPSEAL 1.3 (Tin, 770854-1)
59 1 Digital frequency input 1 M22759/16 22 AWG White8' 0" B28 - DIGITAL FREQ IN 1 2.00" 5.100mm AMPSEAL 1.3 (Tin, 770854-1)
60 1 Digital switched input 3 M22759/16 22 AWG White8' 0" B29 - DIGITAL SW IN 3 2.00" 5.100mm AMPSEAL 1.3 (Tin, 770854-1)
61 1 Stepper IAC 1B M22759/16 22 AWG White8' 0" B30 - IAC 1B 2.00" 5.100mm AMPSEAL 1.3 (Tin, 770854-1)
62 1 Stepper IAC 1A M22759/16 22 AWG White8' 0" B31 - IAC 1A 2.00" 5.100mm AMPSEAL 1.3 (Tin, 770854-1)
63 1 Stepper IAC 2A M22759/16 22 AWG White8' 0" B32 - IAC 2A 2.00" 5.100mm AMPSEAL 1.3 (Tin, 770854-1)
64 1 Stepper IAC 2B M22759/16 22 AWG White8' 0" B33 - IAC 2B 2.00" 5.100mm AMPSEAL 1.3 (Tin, 770854-1)
65 1 Digital frequency in 1 (VR) 2 Conductor Shielded Tefzel (M27500-22TG2T14) 22 AWG White8' 0" B34 B35 - DIGITAL FREQ IN 1 VR 2.00" 45.000mm
1-WHITE Wire 65-1 5.100mm AMPSEAL 1.3 (Tin, 770854-1)
2-BLUE Wire 65-2 5.100mm AMPSEAL 1.3 (Tin, 770854-1)
SHIELD Wire 65-3
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