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1987 Volkswagen Golf - fuel pump relay

Fuse is good.
Fuel pump is good.
Something flaky at the relay.
I can jump the relay (remove relay, connect two big sockets with jump wire) and the pump operates fine.
With either the old relay in place, or a new relay in place, the pump does not operate.
I removed the relay panel under the dash (omigosh, what a tight mess of wires, and everything there looks connected and it's as clean as the day it left the factory.)
I'm stumped.

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  • veeweeart Oct 15, 2008

    Thanks, mdscntst. That's good advice, and if I can figure out how to do this (I am a stunningly inept mechanic and most things electrical are like Martian to me).

    I realized after posting this that I'd put it in the wrong place. It is now here, where a couple of other guys have posted suggestions.



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Make sure you are getting the voltage (V) to the relay. Sure, you can easily bypass this aspect of the relay by shorting the contacts [enables V to relay] but that is entirely different V for the load rather than the V for the coil [which provides EMF, closes relay, makes contact, laaaa].

Evidently, you are getting V to the load [pump turns on once bypassed].

You aren't getting V to the coil side of the relay. Go back and recheck the wiring as well as the pump fuse. Take it out and do a continuity test [out of circuit].

Posted on Oct 15, 2008


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SOURCE: 1987 Volkswagen Golf - fuel pump relay

check for burnt connections where the relay fits in place.and check for 12 volt to one side of small pins with engine cranking and check for earth to the other small pin at fuel pump relay.

Posted on Oct 15, 2008

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