Can't drive my truck! Need help ASAP with Electrical - Ranger-Forums - The Ultimate Ford Ranger Resource


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Old 04-30-2010
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Can't drive my truck! Need help ASAP with Electrical

Hopefully i can get some help here
I drive a 2001 3.0 v6 4x4 AT
Alright so i went to start my truck this morning and it started. I let it warm up for about 30 seconds then it started chugging so i let it run a little longer and it was just getting worse. Then my lights started dimming and the radio shut off so i shut the truck off.

No other cars at the house to jump it so i went to school came back had brother in law jump it and follow me to autozone.

They tested my battery and he said the alternator wasn't doing anything. Drive back home (died 3 times) went and got an alternator off of an explorer (130 amp) Guy guaranteed it to work or he had another one he would give me.

Went home put it in and same problem. I tested the battery and it is only getting 12.28 volts. Not enough, so i wiggled the plugs and wires to see if they were loose and no luck nothing jumped up or changed it just slowly dropped.

Now i have no ride!!! Need your guys help

I had both alternators tested, (old and new) Both Passed. i bought a new battery and had the starter tested and it's good..
I don't know what too do next
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Old 04-30-2010
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I've had this happen before. Took the battery and alternator to Autozone to be tested. Both passed. A few days later it happened again. Took it back and it was the alternator. How old was the new alt that you got off the Expo?
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Old 04-30-2010
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I had them test both my alternators, my old one and new and they both passed and idk how old it is
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Old 04-30-2010
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Try another alternator. It's worth a shot.
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Old 04-30-2010
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Make sure the fuses for the alt is good. Also the wires that plug in the back.

It needs input current to create output.
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Old 04-30-2010
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id say just pay the extra money and buy a brand new one that should solve the problem
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Old 04-30-2010
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that`s not the problem

pull the battery out and check wiring harness that is connected to the inner driver`s side metal fender

friction has rubbed off the wiring insulation and the battery charge wire has grounded out to the metal fender
you will have to remove some of the electrical tape

i had the same problem in the winter time ( both alternator`s checked out fine for charging )
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