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Fuel Pump constantly runs

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Old Sep 23, 2010 | 08:21 PM
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smgospod
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Default Fuel Pump constantly runs
I have a 1989 cherokee 4.0L. The fuel pump runs constantly even if the key isn't in the on position. As long as the battery is connected. the pump runs. Why is that? possible Starter Relay? Any other ideas?
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Old Sep 23, 2010 | 08:42 PM
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fuel pump relay bad
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Old Sep 23, 2010 | 08:45 PM
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If it's not the relay, something is shortening.

Check the relay as that is the most obvious. If the relais is ok, break out the multimeter and start checking the various wires/circuits.

Jeroen
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Old Sep 23, 2010 | 10:36 PM
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Yeah, it's probably the shortening. This kind of stuff happens when it needs to be replaced.
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