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Hello, I am looking for help w electrical issue on a 1988 ford 5.0 gt. This is a no start issue where the first turn of the key you get one click then dead. Following all the normal ckecklist items, I did find the start solenoid to be bad so I replaced. Now solenoid is good but when you turn the key you get no click and the car looses all power. Not even the hazard lights, dome light, nothing. Seems to be no power anywhere but at the batt. Then you leave it sit for ten min. and all the power resets. Everything works again until you turn key, then total power loss for ten min. again…..Help
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Sounds like something is shorting the ecu and it’s fitted with a surge protector. (it’s a guess)
Try removing all the fuses and replacing 1 at a time until it happens again.
Also check battery voltage before you do the above.
Sounds like a bad starter motor, hit it with a hammer if you can get to it, sometimes this will jar the armature causing it to spin.
Make sure you tightened your battery cables and clean them if you didn’t do so already. Also make sure you tightened the cable up at the solenoid end too.
Look hard at your battery ground to the frame/engine block. Take it off and clean it with a wire brush. Looking at the wiring diagram, the hot from the battery goes to the starter relay and splits to the ignition switch and the starter. It passes through 2 fusible links to the ignition switch. I would be looking at my grounds first.
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