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Why isn't there any voltage in the fuel pump but relay is good on a contour?
Wiki User
∙ 13y ago
Did you remove the pump? If not, are you relying on the fuse/ relay contacts for a reading, or did you test each individual connection between the wiring harness plug and the fuel sending unit plug? Just because the relay works, the wiring before or in the pump/ harness connector may be: corroded or loose. There should be an additional fuse for the pump, check that. Also, are you having any other "odd" issues with the ignition circuit, such as when you turn the key, does the ignition cylinder not energize the instrument cluster or occasionally as you rotate the key from "on" to "start", does the cluster suddenly black out for a sec. then return? Electrical issues are a annoying to say the least....
Wiki User
∙ 13y ago
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Wire to electric fuel pump has low voltage?
if you have checked the voltage with a dvom then you need to verify that the power source at the fuel pump relay is correct, if it has the correct voltage pre-relay then your problem is post-relay. if the voltage is not correct pre-relay then simply trace and repair the power source. if the problem is post relay then check the output voltage directly at the relay, if voltage is good trace and repair line from relay to pump. if voltage is not correct then replace the fuel pump relay
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