2005 V6 Mustang Electrical Problem - Ford Mustang Forum
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post #1 of 3 (permalink) Old 4 Weeks Ago Thread Starter
Justin4675's Avatar
Joined: Oct 2019
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2005 V6 Mustang Electrical Problem

My car has a problem where the alternator fluctuates charging between 12-15 volts. My headlights get dim and fan slow down then go back to normal then I'll happen again a few mintues later. I can't give my car anymore than a hair throttle because It'll shutter and misfire.

So far I've gone through 3 batteries and 5 alternators. The pigtail that connects to the alternator has been replaced and I replaced the pcm but it still keeps happening. Unplugging the pigtail from the alternator will make it charge steady at 14 volts but the shuttering and misfire still happen. Any ideas on what could be wrong?

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post #2 of 3 (permalink) Old 4 Weeks Ago
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Your problems (both of them) probably have nothing to do with the battery or alternator. Start by looking into your ignition systems (plugs, wires, etc.) and fuel supply.

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post #3 of 3 (permalink) Old 4 Weeks Ago
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Could be a ground issue. Check them all including the block to frame ground.

Cherish those around you,for at the blink
of an eye,they can be gone.

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