Question about Chevrolet Cavalier
There is usually only four, two for the sender unit, and power and earth to the pump. They are usually heavier guage wires than the sender wires, and easy to spot. If there are more wires, or they're all the same size, you'll need to get hold of a wiring diagram (photocopy from a dealers workshop manual) and find them from the wire colours. The power feed should only come on for a few seconds when the key is turned on, and then go off by itself, so i guess you could also just check all the wires for power one by one and see if they do turn off at the same time as the relay clicks off under the bonnet. Can you hear the fuel pump relay operating? If not there could a further issue, but check all fuses first, and then get an Auto Electrician involved if you're still stuck.
Hope this helps, Mark.
Posted on Dec 03, 2008
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Posted on Jan 02, 2017
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