1978 Mustang II Ghia

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1978 Mustang II Ghia

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Mustang >> Ford Mustang Tech >> Classic Mustangs >> Mustang II Section >> 1978 Mustang II Ghia

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1978 Mustang II Ghia - 3/25/2007 1:18:08 AM

chrisslim25

Posts: 2
Joined: 3/25/2007
Status: offline

I have a 1978 Mustang II Ghia that has an electical problem the alternator seems to be draining my battery and can't figure out why so if anyone has any help to fix it or what to change it would be great thank you.

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chris

Post #: 1

RE: 1978 Mustang II Ghia - 4/13/2007 5:08:54 PM

DonA

Posts: 48
Joined: 1/4/2007
From: NJ
Status: offline

Not sure how you decided that the problem is the alternator.

Best way to check is to disconnect the heavy cable from the alternator. Leave the battery connected and see if the problem go's away. If so problem is a shorted diode in the alternator. Go from there.

Otherwise the best proceedure for locating a problem such as you describe is to disconnect the ground cable then put a voltmeter in series with the cable. The meter should then read battery voltage.

Then disconnect fuses, wires, etc until the voltage drops.

Then you have found your problem.

Disregard any reading less than full battery voltage as it will not be significant.

PS - It might be a good idea to clean the top surface of the battery first as this can give you a false reading.

(in reply to chrisslim25)

Post #: 2