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73-87 Chevy _ GMC Trucks => 73-87 Chevy & GMC Trucks => Topic started by: gutts on April 16, 2016, 05:55:00 pm
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Hello All !
I have a problem I cannot figure out . Perhaps I am missing something ? Long story short :
Key on =power to fuel Solenoid (I tested it it is good)
= no power going to tank switch
I have run the truck momentarily with jumpers to the wires that go back to the rear of vehicle. Both pumps work . The truck has undergone a engine transplant. This has been a year long process. Through out the process there seamed to be an intermittent issue with this . With all the fuel wires, switch , solenoid , oil pressure switch , intact , I've got nothing .
I know where the feed wires exit the firewall and go to the tanks .
Where do the wires that go to the fuel switch come from ? I believe they come from the solenoid??
Where to look ? Are there any common problem areas ?
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If you jump B+ to the test terminal at the fuel pump relay does it run on either tank?
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If I power up the solenoid, I get power to the tan /white wire . So have power going out . I have taken the switch out (temporarily) . With a test light , I tested the wires going into the back of the switch . I have nothing there ...?
I have been working on this problem for a long time . I am stymied . I am thinking that the wire (tan/white) is broken between these points . Does it go straight from the solenoid to the switch ?
Thank you for your response!!
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What I mean by power up is , I get power "going out " of the tan wire .
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What solenoid are you talking about? If you want help diagnosing your problem, you need to have everything connected correctly and nothing bypassed or unhooked
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Sorry , my terminology is wrong . When I used the word "solenoid" I was referring to the fuel relay.
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Okay so with everything hooked up, if you run a B+ to the pigtail at the fuel pump relay, does it work in either tank position and or do you hear either fuel pump running?
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Hello Mr Vile
Thank you for backing me up and telling me to start over . I went back through it again , and I found that , that switch was um kind of intermittent. I do believe that that was the problem . I only get a bit of time here and there to work on it . I will post again if I run into another problem
THANKS
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the switches do get a gummed up and will work like you described. think theyre $15 at the parts stores