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.
SOURCE: 1987 Volkswagen Golf - fuel pump relay
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].
SOURCE: Need a wiring schematic for a 2001 volkswagen
I am attaching a link for a very detailed fuse box diagram for all MK3 VW's:
Central Electric 2 in Volkswagens. Covers 89-99 Golf
and Jetta, 90-97 Passat, all Cabrios, Corrados, and EuroVans.
SOURCE: need 2001 vw cabrio fuse and relay diagram for under dash
order the Haynes manual for your model and everything is there.
SOURCE: diagram for under-dash fuses/relays
See if you can get a copy of the users manual for your car. Then look it up, it's in there.
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