Need help.. 95 fuel pump
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Posting Guru
Joined: May 2002
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From: Baltimore
Need help.. 95 fuel pump
After a search, I've read many of the other posts, but still have a question. My 95 xlt 4.0 quit running last night while doing 50 mph. When I turn the key to 'on', I cannot hear the fuel pump prime so I'm sure my problem is fuel delivery related. I've checked the inertial switch, and PCM relays. All look good. My question is... can I check that I have power the fuel pump without dropping the tank? As my luck would have it, the tank is nearly full which means I've got a lot siphoning to do. Any/all thoughts on this would be appreciated.. Thanks!!
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Posting Guru
Joined: May 2002
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From: Baltimore
thanks for responding... If I have power to and from the fuel pump relay do I still need to worry about the inertia switch?? What I need to know, is where the wiring harness is (onderneath) that goes to the fuel pump. I found 1 connector plug (white) on the inside of the driver side of the frame rail. I thought that might be it, but I'm not sure. I don't want to drop the tank unless I have to. thanks!!
Elder User
Joined: Aug 2001
Posts: 942
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From: South Texas
According to the Haynes manual, 91-95 are all about the same design. If that is so, on my 91 the connector is indeed inside the frame rail and goes into the pump from behind the tank, basically about where the rear wheel is located. It should have at LEAST 3 leads in the connector, but possibly 4. 2 for the sender and 2 larger for the pump power and ground. (Not sure if sender and pump share a common ground)
Anyway, you should be able to locate, unplug and check for power at the connector.
Dialtone
Anyway, you should be able to locate, unplug and check for power at the connector.
Dialtone
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Posting Guru
Joined: May 2002
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From: Baltimore
Thanks for the responses.. One additional question... I pulled the codes, and am getting a 542 (fuel pump circuit failure). Would a faulty pump throw that code? I just want to make sure it is the pump before I drop the tank. Thanks...
Elder User
Joined: Aug 2001
Posts: 942
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From: South Texas
Here is a link for a detailed test of the code you posted. It a LARGE pdf file so be patient for it to koad. Look starting at page 102.
http://www.carsoft.ru/avtorepair/gtest.pdf
There are several possibilities for the code including a bad fuel pump.
Dialtone
http://www.carsoft.ru/avtorepair/gtest.pdf
There are several possibilities for the code including a bad fuel pump.
Dialtone
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Posting Guru
Joined: May 2002
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From: Baltimore
I finally got this fixed. It turned out to be the inertia switch. It didn't need to be reset, it had actually come unplugged. So when I was trouble shooting the problem, I was just looking at the reset button which was fine. I had to pull the carpet back a bit to get to the plug connector. Fortunately, I did all this before I dropped the tank/fuel pump. I would not have been a happy camper if I had dropped the tank only to find out I wasn't getting any power to the pump.
Thanks to all those that responded.
Thanks to all those that responded.
