[T3] Ground for Fuel Pump Plug

SCS Crewcab scscrewcab at bellsouth.net
Tue Jul 12 20:27:16 PDT 2011

Not clear on explanation of whereabouts of the ground wire coming from 
terminal 19 of the ECU. What I have now is a white wire coming out of a 
slit in a section of harness that has a black jacket on it. That wire 
has continuity to terminal 85 of the pump relay. Attached to that wire 
is an inline (VW OEM) clear connector about 2 inches long. Attached to 
the other side of the connector is another white wire that is broken 
off. I can't see any other breaks or openings in that jacket.

Does the wire from terminal 19 of the ECU and the wire to terminal 85 of 
the fuel pump relay run in the same bundle of wires or does each run in 
different bundles? If they run in the same bundle, shouldn't there be a 
break in that jacket somewhere to the left (towards the ECU) of where 
the wire to terminal 85 of the pump relay now exits?

On 7/12/2011 10:17 PM, Jim Adney wrote:
> On 12 Jul 2011 at 16:03, SCS Crewcab wrote:
>> My prob wasn't the ground at the fuel pump plug after all. It was the
>> ground coming from lead 19 from the ECU. At the firewall in the engine
>> compartment, just to the left of center, there is a single wire
>> connector that joins 2 single white wires. One of the wires has
>> continuity with terminal 85 on the fuel pump relay. The other wire is
>> broken off. I'm pretty sure it should connect to terminal 19 on the ECU
>> but, I do not see any place on the harness around this connector where
>> this wire could have broken. It must have broke off just barely inside
>> the harness.
> Yes, that single white wire just snakes out between 2 different
> sections of the jacket over the FI harness. You may be able to see
> down that gap and see the rest of the wire, or feel the stump under
> the jacket. The exposed section of that wire was only 3-4" long, so
> it should not be too hard to find where it came from. You may need to
> cut back the jacket in order to splice the wire back together.
>> When I ground the broken white wire at the firewall, the relay does
>> energize and I get power to the fuel pump but, the pump doesn't spin.
>> This car has sat for 3 years with an empty gas tank and the pump was
>> working when I parked it. I priced a new pump online and, it's a real
>> bargain at $547.00. I'm hoping the gas that was left it has the pump
>> mechanism gummed up. Is there a link somewhere online that gives
>> instructions on cleaning or repairing them?
> I rebuild the version that came on '70-73 cars. The cost is $75 or
> $125 plus return shiping, depending on what the problem is. There's
> very little point in hoping that you can just clean it out and it
> will work. They're all old enough by now that they're failing from
> other problems, so even if you got it to work, it would probably only
> be temporary.

More information about the type3-vwtype3.org mailing list