W108 280SEL 4.5 USA - correct ECU?

Hi Alex,

which sensor do you talk of?

ECU reads rpm from trigger contacts and if engine runs applies ground to relay. +12 V (15) come from ignition. And there is no fuse for fuel pump. If you want to see exact wiring have a look at Downloads area.

Please excuse me, i was refering to the fuel pump relay and by mistake i wrote sensor.

I’ll check the diagram, thanks, but first thing i must check if there is voltage at the relay plug when i turn the ignition on?

Correct?

Just read the wiring diagram I made