Fuel Pump Relay logic reversal for Megasquirt

[timmy2]

Here is a cool little wiring project I made up for someone who was installing their own EFI system with Megasquirt, and wanted to use the normal MS fuel pump relay logic.

What I did was build a plug that looks like a normal relay to plug into the original FP relay base, with a new relay base attached with the wiring changes to reverse the FP logic.

Just plug the original relay into the new base and the plug into the old base and it works for MS and other U.S. based FP logic.

Fresh out of the molds.



Taped up with adapter plugged into the relay base.



Schematic.