Question about 1984 Ford F 150

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84 ford not charging

The altenator is new as well as the battery and the regulator. I did have this new altenator checked after i replaced it but still nothing. Any ideas?

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The only thing that comes to mind is electrical connections--battery cable connections (obvious, but worth mentioning) and all wiring to alt. and regulator, nothing loose, corroded? I'd also check the battery by swapping in something else that may fit, or having it tested. Yes, it's new, but I have seen (although rarely) a bad battery that was right off the shelf, wouldn't take a charge.

Posted on Nov 26, 2008


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The first question for you is, What is the charging output for the altenator at idle?? If less than 12.3 volts, replace altenator. Typically, the altenator gets tested at 2500-3000 rpm on a bench tester. Your problem may be in the low rpm output range.

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84 ford not charging

Possibly could solve the problem IF the cables are bad. Do u know if they might be original? If they might be, (or almost original) I would replace them, as 25 years is mighty ancient when it comes to cables. Running out of ideas!!!! Keep me posted. Gotta get to work, will check in later.

Nov 26, 2008 | 1984 Ford F 150

1 Answer


well for starters your altenator is bad because what it is dolinging is over charging the battery hence why it boiled off the water/acid in the battery. the regulater is intergrated into the altenator. there is not a short because numberone your car would not start and two your battery would explode. i never test a battery or altenator at a store like napa or Oreilly's because they are not mechanics ......they are parts guys. your altenator should charge the battery at no more than 14 volts and the average is 13.5 volts. you need to replace the altenator the reason why you are losing a charge is be cause as the car is running the battery is being discharged because the regulator is defective in the altenator. please rate this thanks

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