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T77911S T77911S is offline
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Join Date: Oct 2006
Location: MYR S.C.
Posts: 13,019
the yellow relay is DE-ENERGIZED to run the pumps. so the coil can be bad and the pumps run, even with the engine off but key on.
it would have to be either bad metal used for the contacts or probably the solder joints in the relay.
I would pull the original apart and clean the contacts with 600 paper, resolder all the joints, same with the speed relay under the seat. very famous for bad solder joints. I bet there are a lot sitting in shops trash piles that could easily be repaired.

I removed the speed relay and soldered the wires together in my 930 and I put in an MSD with a rev limiter, or you could uses the rotor limiter.

as far as the original yellow relay I would like to get a bad one to see what is really failing, better be careful with that wish, mine could be next.
86 930 42kmiles [__] RUNNING:[__] NOT RUNNING: ____77 911S widebody: SOLD
88 BMW 325is 200K+ SOLD
05 BMW 330CI 130K:: [__] RUNNING: [__] NOT RUNNING:
08 VOLVO V70 190K:: [__] RUNNING: [__] NOT RUNNING:
Old 01-05-2017, 09:29 AM
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