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Post by Danny on Feb 19, 2006 21:49:25 GMT -5
hi, i have a 96 350 silverado. recently i noticed that my fuel pump relay would get really hot after i drove for a while. it actually gets so hot that the plastic around one of the connectors is actually melting. its melting on the relay and on the fuse box. many times i have gone to start my truck and it wouldnt start. all i do is take the relay out and put it back in and maybe wiggle it a few times and it works. it doesnt seem to be loose in the slots though. twice it has died on me while i was driving. oh and yes i have replaced the relay but i have the same problem. i think it is just a matter of time before im stranded somewhere on the side of the road. any ideas? thanks
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Post by re-tired on Feb 20, 2006 0:02:58 GMT -5
Either you have a grounded hot wire (unlikely) or your fuel pump is drawing to many amps. (Need a new pump)
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Post by DanD on Feb 20, 2006 7:40:56 GMT -5
Sorry I didn’t mean to forget you on the other board (TMM) but I’m glad you came over here. Like I was saying the truck should run if you unplug the relay due to the oil pressure switches, back-up means of supplying power to the pump. You said that the truck quits when the relay is unplugged and it shouldn’t, you also said that unplugging the oil pressure switch did not make any difference with the relay getting hot. I would want to know why the oil pressure switch circuit isn’t working as intended, maybe finding that will repair both problems. Start with making sure there is power at terminal D of the switch at all times and that there is power at terminal C when the truck is running. If so start chasing the gray wire from the switch until you find the open in the circuit. A quick way of testing the switch would be to jumper terminals D&C and see if the pump runs; if not and there is power at the orange wire, start chasing the gray wire again. If the pump does run replace the switch; that would also be an easy place to test the current draw of the pump, by connecting an ammeter across terminals D&C of the oil pressure switch. You should have 8 to 12 amps of draw while the pump is running. It could very well be that the pump like what re-tired said is drawing to much amperage burning out the oil pressure switch and the connections at the relay. One last thing the burnt connections at the relay box they must be either cleaned & recrimped or replaced, if you don’t they will come back and bite you. Let us know what you find and I promise not to forget you; these guys here wouldn’t let me anywise. LOL. Dan.  |
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Post by re-tired on Feb 20, 2006 23:19:14 GMT -5
Whoa ! Obviously i walked into the middle of something a little more invovled ....um ..excuse me ,pardon me. coming thru. Ok Dan , I'm back in the peanut gallery . Let'r rip  |
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Post by DanD on Feb 21, 2006 5:30:05 GMT -5
LOL re-tired LOL
I'm right there with you I sort of like this peanut gaalery.
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