I have a 96 Chevy K1500 5.7 which keeps blowing fuses for the power outlets (cigarette lighters). Really annoying issue which I think is connected to my power locks as well (which do not work either). I have replaced the fuse before which worked for about a week, then blew again. Now it blows as soon as I try to replace it. Any ideas?
First off the reason for instant fuse blow is because this is a positive wire grounding out or touching/crossing a grounded surface. I would first target the Cig lighter outlet connections also if the outlet is rusty inside looking, replace it.
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Remove connector from cigarette lighter and see if it stops blowing but yes if fuse blows it won't read codes on scanner,fuel pump pressure or fuel pressure regulator usually has same symptoms as what you are discribbed.
Unplug cigarette lighter, check circuit, unplug each door individualy at first, Don't forget the back doors, check circuit. Usualy the door wiring is damaged but there may be more then two cigarette lightes depending on the model.
That or the wiring to it is shorted at some point. Remove the connection at the center back of the socket and replace the fuse--if ok, replace or repair the socket. If still blows fuse, check the wire you removed for damage near any metal object.
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