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Old 03-31-2015, 03:47 PM   #1
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Electric problems

The cars runs fine and the headlights have no problems on at night but the inside the CD player and the battery needle drop when stuff is on. The car has a bigger alt I got the battery and alternator tested but nothing wrong

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Old 03-31-2015, 03:57 PM   #2
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Underdrive pulleys? Those will do it. Could also be a loose connection somewhere.

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Old 04-01-2015, 08:45 PM   #3
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I would check all the grounds thoroughly.Pay special attention to the secondary ground(strap between back of cylinder head and firewall.The link below goes into detail about this.Make sure the charge indicated light on the dash comes on momentarily when you first turn the key on.If it doesn't,repair the circuit because a non functional charge indicated light can cause the alternator to not charge.Did you paint the alternator or its bracket by chance??If so,the alternator is case grounded which means it won't be grounded correctly if its not bare metal to metal.Make sure your serpentine belt is tight enough because a worn tensioner will allow too much belt slack causing an under charge condition.
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Old 04-03-2015, 01:06 PM   #4
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Foxbodies have VERY weak alternators, barely adequate for a bone stock car. Even if its a "bigger" alt you need to upgrade it to 94-up spec which is called the "3G conversion". Look it up on the interwebs. Fixes a lot of power issues with the foxes.
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