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

Hi Patrick, thanks for the reply.

From what I can make out looking at the wiring diagram for the car (1994 Rover 420 Turbo) power is permanently applied to the main relay through pins 30 and 86. Pin 85 goes to the ECU to a pin marked 'main relay drive'.

The ECU has a pin marked 'ignition sense' so ...

Just to add, the ECU gets power from another source as soon as the ignition is turned on.

It's only the injectors and stepper motor that are left on the main relay.

Although from what I've been reading, MS turns on the pump relay for a few seconds when the ignition is switched on and then turns it ...

Can pin 37 of MS (fuel pump relay drive) be used to trigger 2 relays? The wiring diagram shows only the fuel pump relay using pin 37, whereas the main relay is on a switched live.

I currently have the fuel pump relay on my car triggered through pin 37. The issue I now have is that my main relay ...

That'll do, thanks Don. I had it all planned out and when I looked again at the wiring diagram and this cropped up, my heart nearly sunk, heh.

I didn't think MS-II would need a perm live due to the data being written on the EEPROM but thanks for clarifying. I'll hopefully get the rest of the wiring ...

Hi guys,

Getting to the installation stage now and need a bit of help with the 12v supply for MS. I've done a bit of searching and am a little bit clearer but wanted to double check. I know this comes up quite often so I'm sorry if you're starting to get annoyed answering the same questions over ...