'03 Relay to Fuel Pump

[jhinn939]

Hello everyone, just need some quick help.

Long story short, car shutoff while driving down road. Discovered no fuel to be issue, fuse good, relay good. Ended up replacing pump, performed bench test on old pump and nothing. After installing new pump still nothing, did bench test on new pump and works. Put a jumper across relay sockets using wire and checked for 12v at both sockets which was good and at wiring connection at pump, nothing. Checked at bulkhead socket connection, nothing.

My question is are there any other components between relay and bulkhead connection or what the best way to proceed from here is? Would performing an Ohm test between relay and bulkhead connection work? I've searched for hours on google and can't get a definite answer. I did find a very simple wiring diagram for an '02 (attached) which listed a fuel pump oil pressure switch but in parallel and a fuel pump testing terminal (can't find any information on either, like location, etc).

Any help would be very appreciated, thank you.

 

[jhinn939]

So a little update, while sitting at work I found the attached diagram which is suppose to be for a 2003. It is showing the only thing between the relay and the bulkhead connetor (C305) is another connector (C200). Does anyone know where this connector may be located?

 

[Chris Ingram]

Here is a link to an older post with simular problem at c305. Sounds like it is under driver seat.
http://buickforums.com/forums/threads/16645-02-Gas-Gauge-issues-Help

 

[jhinn939]

Ok, was able to work on the car some today. Pulled the bulkhead connector completely out and found the problem. The 12v connector deteriorated so bad the wire detached from the connector. while pulling up the carpet to get to the connector I noticed a good amount of water trapped under the carpet in the cushioning.

Next step is to replace connector (once I can find one) and investigate why water seems to be collecting under the carpet.

I will try to keep this post updated in case anyone else has similar issues. Hopefully it will help you out.