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Old 05-12-2003, 07:00 AM
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Post 66 Mustang, multiple Problems...

I got a couple problems…
1) Alternator or Voltage regulator? Had the battery tested and it’s good. But it’s not picking up any juice when the engine is running, I’m guessing Altinator but my pops-in-law suggested that it may be the voltage regulator…
2) Second problem, no lights work on the car but the headlights… no turn signals, brake lights or rear lights. Couple this also be tied into the voltage regulator? Why would my headlights work but nothing else.
Looks like the previous owner tried to redo the interior and when he removed the dash to paint the interior, he didn’t cover the wiring so all the wiring is painted white.

I’m in the process of trying to remove all the white paint (that’s a bunch of fun) and I don’t want to have to rewire the whole car if I don’t have to… could the voltage regulator be the solution to everything?

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Old 05-12-2003, 04:14 PM
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To check the alternator, connect a wire at the regulator connector between the "a" terminal and the "f" terminal. The alternator will then put out all that it can. Checking with a volt meter at the battery, it should read about 13.5 to 14.5 volts. If it does show readings in that range, the alternator is good. Then check with the regulator hooked up. If not, make sure that you have 12 volts at the large connection in the rear of the alternator. If the voltage reading is less than atleast 13 volts, the regulator is due to be replaced. As far as the lights are concerned, I doubt it is related to the charging problem. I have an old Chilton's manual for Mustangs that has the wiring diagrams. There is no indication that the lights go thru the charging system on that car. I would check for fuses and fusable links.
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