02 Cavalier fuel pump will not power on
January 29th, 2013, 12:57 PM
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02 Cavalier fuel pump will not power on
the fuel pump in my cavalier will not power on at all. I know it is good because i hook a direct 12 volt line from the battery to the pump and it powered right on. I have 12v all the way from the battery to the harness and all the way through the harness to the plug that connects to the fuel pump. Any other reasons why the pump will not turn on?
January 29th, 2013, 2:02 PM
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fuzes are good, relays are good, like i said i have voltage the whole way through, the fuze has no physical damage and i get 12 volts when testing it, also the relays are clicking on
January 29th, 2013, 2:23 PM
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the fuel pump in my cavalier will not power on at all. I know it is good because i hook a direct 12 volt line from the battery to the pump and it powered right on. I have 12v all the way from the battery to the harness and all the way through the harness to the plug that connects to the fuel pump. Any other reasons why the pump will not turn on?
This is how it works. With key switch on, anti-theft yada yada ok, the fuel pump relay energizes. The normally open contacts close from a fused circuit to energize the pump.
The relay contacts could be burned. Check the +12 volt post from the fused fuel pump relay base with key on for voltage, do you have it? If so, jumper that to the post that goes to the pump, does it run? If so, replace the relay.
January 30th, 2013, 6:36 AM
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I'm confused. You hot wire it direct from the battery and it runs. You hear the relay click, fuse is good.
This is how it works. With key switch on, anti-theft yada yada ok, the fuel pump relay energizes. The normally open contacts close from a fused circuit to energize the pump.
The relay contacts could be burned. Check the +12 volt post from the fused fuel pump relay base with key on for voltage, do you have it? If so, jumper that to the post that goes to the pump, does it run? If so, replace the relay.
This is how it works. With key switch on, anti-theft yada yada ok, the fuel pump relay energizes. The normally open contacts close from a fused circuit to energize the pump.
The relay contacts could be burned. Check the +12 volt post from the fused fuel pump relay base with key on for voltage, do you have it? If so, jumper that to the post that goes to the pump, does it run? If so, replace the relay.
yeah it all confuses me too. I have 12 volts right at the plug on the harness for the pump. I did a continuity check on the harness and all the wires are good. But one more thing i just remembered.....when i put the key in the one postion ( not attempting to start the engine) i get 12 volts on the meter just for a second and it goes away. Is is supposed to do that?
February 2nd, 2013, 12:33 PM
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I am having the same problem with my 2002 Chevy Malibu, I have taken fuel pump completely out tested and cleaned connections worked fine until I put it back together. I am stumped it makes no sense at all
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February 2nd, 2013, 12:36 PM
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if you get anywhere with it, please message me, id appreciate it
February 2nd, 2013, 12:54 PM
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the fuel pump in my cavalier will not power on at all. I know it is good because i hook a direct 12 volt line from the battery to the pump and it powered right on. I have 12v all the way from the battery to the harness and all the way through the harness to the plug that connects to the fuel pump. Any other reasons why the pump will not turn on?
The fuel pump shouldn't have power unless the f/p relay is closed. It should only be closed for 2seconds at key on and then be off until the engine starts. You are checking on the pink wire, correct?
February 3rd, 2013, 6:37 AM
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the ecm commands the fuel pump on by energizing the control side of the fuel pump relay.
The fuel pump shouldn't have power unless the f/p relay is closed. It should only be closed for 2seconds at key on and then be off until the engine starts. You are checking on the pink wire, correct?
The fuel pump shouldn't have power unless the f/p relay is closed. It should only be closed for 2seconds at key on and then be off until the engine starts. You are checking on the pink wire, correct?