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Old 08-10-2007, 01:40 PM
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Generator issue

My car battery is not charging. It reads about 12.2v; enough to start and run, but with lights or anything like that it slowly drains the battery. I started the car, turned on lights and wipers, had someone get the revs up to about 2000 and there wasn't any charging occuring, steady at 12.2/12.0...and dropping at the battery. Any thoughts?

It's a 1962 cadillac.

Thanks in advance

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Old 08-10-2007, 02:04 PM
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generator problem

If you have the original electrical system in the car you'll have a seperate voltage regulator. There's a way to bypass the regulator and in effect "hot wire' the alternator. If the alternator charges then you know the regulator or the associated wiring's at fault. If it doesn't charge then you have an alternator or related wiring problem. It's been a long time and I'm not at work so I can't tell you off the top of my head which wires to jump. I don't want to guess because I don't want to be responsible if you start your car on fire. I'm sure someone here remembers or has the info at their fingertips.
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Old 08-10-2007, 02:38 PM
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im an idiot. I tightened up the belt and it jumped to 13.7v....but it makes a horrible screeching sound. It is unbearable. Is the screeching a good indication that it is time for a new belt?
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Old 08-10-2007, 03:06 PM
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generator problem

Yes, or possibly one of the driven pulleys is attached to something that is seizing up. For example an A/C compressor, alternator, P/S pump etc.
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Old 08-10-2007, 11:10 PM
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Doc here,

Most likely you have a glazed fan belt now..replace it first off..

Then is you still get squeal, you probably have an end bell bearing going out..

IF you can locate a rebuild kit for a GENERATOR, it will (should) have end bell bearings..rebuild the GENERATOR..including the brushes, and clean the copper pad pickups on the armature, until shiny copper, and have no burrs..

When installing the GENERATOR bearings..get a very small punch, dimple the races 1/3 the way around on each..this will prevent the bearings from EVER spinning.

Use a hobby knife to clean out the insulators between the pickup pads , be careful not to scar a pad edge as this can tear up the new brush set.


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Old 08-24-2007, 09:40 AM
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I know this response is extremely delayed, but is that just proper maintenance Doc? Should that be done fairly regularly?
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Old 08-24-2007, 01:34 PM
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Quote:
Originally Posted by ggassert
I know this response is extremely delayed, but is that just proper maintenance Doc? Should that be done fairly regularly?

Doc here,

Only if you regard new brushes, bearings, turning of the pickup pads, and the like ... routine maintenance..Usually those only have to be done once every 5 or 6 years...

Belt inspection, wire connections..YES..but let me ask you this....

When was the last time you checked yours??

If you don't remind someone , they WON'T do it...


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Old 08-24-2007, 01:38 PM
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I can't even tell you. I actually inherited the car, so i am slowly going over it doing what I can...which isn't much. I had planned on replacing belts, but full time college student and part time job doesn't leave much. I will be replacing the belts and will attempt the generator rebuild.
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Old 08-24-2007, 01:45 PM
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Quote:
Originally Posted by ggassert
I can't even tell you. I actually inherited the car, so i am slowly going over it doing what I can...which isn't much. I had planned on replacing belts, but full time college student and part time job doesn't leave much. I will be replacing the belts and will attempt the generator rebuild.
`

Doc here,

An honest answer..

Most will tell ya..."Do it all the time..when I tune up.." .. But never do..they wait until it snaps on a stretch of desert somewhere..and the nearest one is 150 miles away...

AT least this way...even if they SAY the do..you will know, they will AT least check it this time ..to be sure..and you might save them some heartache down the road



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Old 08-24-2007, 02:56 PM
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thanks for the help, doc
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