230E Fuel pump stays on when ignition off
12-08-2023, 10:57 AM
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c class coupe 250d
230E Fuel pump stays on when ignition off
Baffled 
I've got a lovely barn find 1982 W123 230E which I've not got running really well, but a problem has just started which has got me baffled.
When I switch the engine off and take the key out, the fuel pump stays running.
I have to take the relay out to switch it off. Plug the relay back in and its starts running again.
I'd understand the relay is at fault if it didn't switch on but not off ??
I've taken the relay apart and it all looks good, with both inner small relays operating fine when I put 12v on.
I checked it by following the video on you tube.
Has anyone got any other ideas?
I've got a lovely barn find 1982 W123 230E which I've not got running really well, but a problem has just started which has got me baffled.
When I switch the engine off and take the key out, the fuel pump stays running.
I have to take the relay out to switch it off. Plug the relay back in and its starts running again.
I'd understand the relay is at fault if it didn't switch on but not off ??
I've taken the relay apart and it all looks good, with both inner small relays operating fine when I put 12v on.
I checked it by following the video on you tube.
