S-10 & Blazer 1982-2005
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94 S10 changed the fuel pump but the fuel pump wont turn on

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Old October 24th, 2017, 10:34 AM
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Default 94 S10 changed the fuel pump but the fuel pump wont turn on

my 1994 S10 5 speed wont start , was at the airport went in and out then jumped in my truck but it wouldn't start, changed the fuel pump , cause I thought it was broken , replaced the fuel pump and strainer, found out the fuel pump wasn't turning on when I turned the key
any suggestions ?

Last edited by T Meekis; October 24th, 2017 at 2:36 PM.
Old October 24th, 2017, 2:04 PM
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wondering if its the fuel pump relay switch ?
Old October 24th, 2017, 3:00 PM
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That would be my guess. Swap the relay with the horn, or a/c relay (if you have a/c).
Old October 25th, 2017, 10:48 AM
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I did the swap after work yesterday but the fuel pump still wont start when I turn the ignition on , I even changed all the relays for the a/c horn and fuel pump
Old October 25th, 2017, 11:26 AM
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If you don't have a volt meter, get a 12 volt test light. With ignition on, check the wires to it, I assume you checked the fuse.
Old October 25th, 2017, 2:37 PM
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yes after I replaced the fuel pump and wouldn't start the first thing I did was check/replace the fuse , ( I also didn't put my truck bed back on yet if that has any effect on why it doesn't work :P ) so next step will be to get a volt test light , test the wire on the fuel pump or the fuel pump relay ? or both ? and thank you kevinkpk for your help

Last edited by T Meekis; October 25th, 2017 at 2:40 PM.
Old October 25th, 2017, 2:43 PM
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Pump, if it has power that will save you a step. If no power at the pump, back track it to the relay, and fuse.
Old October 26th, 2017, 9:51 AM
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Started my truck after work yesterday ! I connected a grounding wire from where u pour gas into the tank ,to the frame of the truck , I honestly didn't know that would make a difference , I connected the grounding wire from the one the comes out of the fuel pump to the frame but didn't think to connect the wire that was connected to the top of where u pour gas , next to the gas cap
Old October 26th, 2017, 10:01 AM
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then found out my alternator seized up , wouldn't turn , was wondering why the belt was screeching like crazy and started smelling burnt rubber when the truck was running lol found out it was the alternator my truck was sitting there all year outdoors , a friend of mine said its most likely rust due to the age of my truck , don't know what kind of work the previous owner did or how old the alternator is , but that's next on the list , change the alternator :P took it off the truck already , just need to get a new one and slap it on , then my truck should be good to go
Old November 13th, 2017, 1:33 PM
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did you check the pump fuse and relay ! if either one of those things are bad the pump won't work !




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