BenzWorld Junior Member
Date registered: Aug 2013
Vehicle: cls 320 cdi
Mentioned: 0 Post(s)
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ok found relay k67, it was in the top left of the fuse box rather then the bottom left.
Took the relay out and tested the relay socket for +12v on the switching contact - it was ok and showed 12v - so this means fuse 74 in the prefuse box must be ok. Shorted out the switching circuit (the relays job) and the pump runs.
I started the car and linked out the relay to run the pump - the pump runs but the car does not rise
I checked the signal to the relay socket and would of expected 12v telling the relay to switch and the pump to run - however I didn't get anything, 0v
So it seems like the relay is not getting its signal to tell the pump to run.
Any ideas what I should try now ? Thanks