High Quality 4' Relay Board cable for connecting your MegaSquirt-I or II ECU to your Relay Board. (Now updated to pass through MS2 Ignition and IAC signals) It has a shielded wire on pin 24, grounded at only one end to minimize noise on the tach wire. All the lower pins are connected, and you can use crimp type pins (not included) to add wiring to pins 3 through 6 if desired.

If you've ever tried to build one of these up you know they are very labor intensive. These top quality cables feature metal AMP hoods and a shielded tach wire. Just remove one of the DB37 covers, carefully pass it through a 1.25" hole and put the hood back on.

Note that the Wiring Harness and Relay Cable are 'mutually exclusive', meaning they are not designed to be used together. If you are using the wiring harness then you are wiring everything directly back to the DB37 on the ECU with relays and fuses where needed. If you are using the Relay Cable you are connecting the DB37 on the ECU to the Relay Board directly (so there is nowhere to plug the harness in anymore) and you then wire everything directly to the screw terminals on the relay board. Our Wire Bundle comes in handy for wiring up all of the sensors/injectors/etc to the Relay Board.

For a tech/how-to video for installing your MegaSquirt Relay Cable into your car, check out our Tech & How-To Videos Page here.