BADASS of New England

An automobile club for the enthusiast who enjoys the last of the big GM cars. The rear wheel drive B and D bodys. Chevrolet Impala SS, Caprice, 9C1, Buick Roadmaster, Oldsmobile Custom Cruiser, Cadillac Fleetwood
 
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 Fuel pump relay ground issue

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GasTT



Posts : 2675
Join date : 2009-01-19
Age : 28
Location : Treasure Coast, FL

PostSubject: Fuel pump relay ground issue   Mon Jun 03, 2013 6:47 pm

Working on a RMW for somebody. Fuel pump not working. I applied 12v to the test lead and got nothing. Diagnostics point toward fuel pump relay ground. I applied 12v to the test lead while grounding the sending unit right at the connector, still nothing. I know the pump is dead. But still, the relay is not grounding. Cleaned the drivers head front grounds at the coil still nothing. Any ideas?
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sdstick



Posts : 4278
Join date : 2009-03-20
Location : Revere, MA

PostSubject: Re: Fuel pump relay ground issue   Mon Jun 03, 2013 10:13 pm

Drivers side kick panel ground is maybe the relay

Not sure where the sender ground is on a wagon...never looked...sorry

When you put 12v on the prime wire do you have 12V at the pump connector?

Check 12V to any ground back there

If you get 12V Make your own ground & see if the pumps any good

_________________
Steve


96BBB 28K 3.42 Bolt-ons
95BBB 100K 3.73 383 New DD...already broke fixt the 4L60E twice
95 Black WB4 Hole...ee...grail
96 Black WB4 No holes in this
95BBB 189K 3.08 Old DD Stolen...by Matt. Cool
Whine..eee...Silver LS6
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GasTT



Posts : 2675
Join date : 2009-01-19
Age : 28
Location : Treasure Coast, FL

PostSubject: Re: Fuel pump relay ground issue   Tue Jun 04, 2013 10:15 am

I have power at the rear connector grey wire when connected to the test lead. I applied 12v and ground directly to the pump side of the harness today and nothing. GWS fuel pump.
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sdstick



Posts : 4278
Join date : 2009-03-20
Location : Revere, MA

PostSubject: Re: Fuel pump relay ground issue   Tue Jun 04, 2013 10:27 am

Exactly

Hopefully fuel connections, straps & bolts are still servicable

Did 2 (Matts & mine) in 4 hours the other day

Took me 1/2 hour (+) to eventually yank the 3/8 connection apart on my DD

Whoever replaced it bent 1 of the 4 legs of the internal snap retainer ( OEM metal connection)....SOB...not much blood when it let go luckily... Laughing

I also had to balance the heat shields during re-install because of how Matts exhaust runs...PIA

I was SOoooo happy I had anti-siezed every bolt in Matts & my DD wasnt beyond.


_________________
Steve


96BBB 28K 3.42 Bolt-ons
95BBB 100K 3.73 383 New DD...already broke fixt the 4L60E twice
95 Black WB4 Hole...ee...grail
96 Black WB4 No holes in this
95BBB 189K 3.08 Old DD Stolen...by Matt. Cool
Whine..eee...Silver LS6
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boojum



Posts : 2152
Join date : 2009-01-21
Age : 29
Location : NH

PostSubject: Re: Fuel pump relay ground issue   Tue Jun 04, 2013 8:41 pm

GasTT wrote:
I have power at the rear connector grey wire when connected to the test lead. I applied 12v and ground directly to the pump side of the harness today and nothing. GWS fuel pump.

Try to reverse the polarity briefly and back a few times.
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GasTT



Posts : 2675
Join date : 2009-01-19
Age : 28
Location : Treasure Coast, FL

PostSubject: Re: Fuel pump relay ground issue   Tue Jun 04, 2013 11:09 pm

Ill give it a shot
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PostSubject: Re: Fuel pump relay ground issue   Today at 8:19 am

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Fuel pump relay ground issue
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