MSefi.com read only forum (Jan.15,2018)

MS2/V3.0 with Relay Board

Connecting relay board to MS @ DB37, (pins 1,2, and 7-19 on MS) does it matter which pins are used for grounds? Are they all equal for main grounding or sensors?

I noted the wiring diagram for the relay board shows 1-18 as all connected together, but 19 is separate and noted as a "sensor" ground. Does this pin 19 connection need to go to any particular pin at the MS end of the cable? or will any ground pin do? Do I just need to make sure I have enough extra main grounds (4 or 5 wires) running between RB and MS on any of the MS pins listed above and any 1-18 pin on the RB?

I checked my MS and the pins listed above are shorted to each other and the case, indicating they are all "equal" grounds?

Thanks,
Jeff

Pin 19 is an isolated sensor return on the relay board, so the relay cable must have a wire on pin 19. However, it is not a special ground on the MS.

Thanks Matt.
So any of the ground pins at the MS DB37 are OK to use, ALA pin 19 on the relay board is connected to one of them. Same with the other ground connections.

Cool, this would be good information to have in the build instructions for relay board to MS cable assembly. That said, I guess even using the relay board is going out of popularity these days with all the other advancements with MS.
Jeff