
8′ MegaSquirt Wiring Harness for MS3X
MegaSquirt MS3X Wiring Harness – 8 feet 8′ of TXL High temp automotive grade wire. 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 board. We’ve custom printed these to include all the inputs and outputs on the expansion board. Note that you will still need our regular MSHarness (or relay board/relaycable/wire bundle combination) for the main board DB37 – this is just the MS3X harness. Includes wiring for sequential injection, sequential coil on plug, nitrous, boost control, and more. Printed Label Wire Gauge Base Color Stripe Color 1 MS3X-1: INJECTOR G 20ga White-WHT Dark blue-BLU 2 GROUND – no printed label 20ga Black-BLK no stripe 3 GROUND – no printed label 20ga Black-BLK no stripe 4 MS3X-4: INJECTOR F 20ga White-WHT Dark green-GRN 5 MS3X-5: FLEX FUEL INPUT 20ga Orange-ORN no stripe 6 MS3X-6: BOOST CONTROL 20ga Light green-LTGRN Red-RED 7 MS3X-7: INJECTOR E 20ga White-WHT Red-RED 8 GROUND – no printed label 20ga Black-BLK no stripe 9 MS3X-9: IDLE VALVE 20ga Light green-LTGRN Pink-PNK 10 MS3X-10: INJECTOR D 20ga White-WHT Pink-PNK 11 MS3X-11: LAUNCH CTRL IN 20ga Gray-GRY Red-RED 12 GROUND – no printed label 20ga Black-BLK no stripe 13 MS3X-13: INJECTOR C 20ga White-WHT Light green-LTGRN 14 MS3X-14: SPARK A 20ga Yellow-YEL no stripe 15 MS3X-15: SPARK C 20ga Yellow-YEL Light green-LTGRN 16 MS3X-16: INJECTOR B 20ga White-WHT Orange-ORN 17 GROUND – no printed label 20ga Black-BLK no stripe 18 MS3X-18: SPARK G 20ga Yellow-YEL Dark blue-BLU 19 MS3X-19: INJECTOR A 20ga White-WHT no stripe 20 MS3X-20: INJECTOR H 20ga White-WHT Purple-PUR 21 MS3X-21: SPARE ADC 20ga Light blue-LTBLU no stripe 22 MS3X-22: EGO2 20ga Light blue-LTBLU Dark blue-BLU 23 MS3X-23: EXT_MAP 20ga Light blue-LTBLU Red-RED 24 MS3X-24: NITROUS OUT 1 20ga Light green-LTGRN no stripe 25 MS3X-25: NITROUS OUT 2 20ga Light green-LTGRN Dark blue-BLU 26 MS3X-26: TACH OUTPUT 20ga Light green-LTGRN Orange-ORN 27 MS3X-27: VVT 20ga Light green-LTGRN Dark green-GRN 28 MS3X-28: TABLESWITCH IN 20ga Gray-GRY Purple-PUR 29 MS3X-29: NITROUS INPUT 20ga Gray-GRY Dark blue-BLU 30 MS3X-30: DATALOG INPUT 20ga Gray-GRY no stripe 31 MS3X-31: PT4 LOGIC OUTPUT 20ga Purple-PUR no stripe 32 MS3X-32: CAM INPUT 20ga Dark green-GRN no stripe 33 MS3X-33: SPARK B 20ga Yellow-YEL Orange-ORN 34 MS3X-34: SPARK D 20ga Yellow-YEL Pink-PNK 35 MS3X-35: SPARK E 20ga Yellow-YEL Red-RED 36 MS3X-36: SPARK F 20ga Yellow-YEL Dark green-GRN 37 MS3X-37: SPARK H 20ga Yellow-YEL Purple-PUR