alternator - Team Camaro Tech
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post #1 of 6 (permalink) Old Mar 28th, 03, 09:53 AM Thread Starter
 
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my car would start but would not keep charge so i replaced alternator. now i connected new alternator,then put terminals back on battery,neg post ok but when i put positive post on it would spark,please help,thanks p.s i know i'ts probably something stupid that i did wrong
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post #2 of 6 (permalink) Old Mar 28th, 03, 10:04 AM
DjD
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Not much you could have done wrong the 2 wire plug in the alt only fits one way I believe. I think the spark you are seeing is why your car wasn't charging before with the old alt. You have something shorted to ground that shouldn't be... I'll assume your car is a '69 by your screen name but tell us a bit about it. Is it stock? Any electrical mods? Stuff like that...

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post #3 of 6 (permalink) Old Mar 28th, 03, 04:46 PM
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The amount of spark is sort of preportional to the amount of oops short or grounded out wire. If it's a hard core sparking I'd figure maybe positive lead to starter or other heavy wire that could of lived with a shorted out condition thru the problem. The starter wire coming down the firewall behind the engine takes a lot of abuse also and might of lost some insulation.
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post #4 of 6 (permalink) Old Mar 29th, 03, 04:50 AM
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Migs, Did you charge the battery up backwards before putting the new alternator on?

If the battery was dead it could be charged backwards giving you reverse polarity. I've seen it happen more than once and the battery will spark nicely when you go to hook it up.

Otherwise, I agree with the others you may have a short somewhere.

Drew<br />69' X-11 Coupe
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post #5 of 6 (permalink) Old Mar 29th, 03, 07:19 AM
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Migs;
There may be something wrong or there may not.
First - always hook the Pos. cable up First! Then hook up the Neg. There may not be a spark when you do it this way. "Problem" solved.
Refer to DjD's reply about options or stuff you may have added that draw power all the time. Even a clock can product a "spark" at the positve cable. Try hooking a 12~14vdc test light between the cable and the post of the battery - if it lights there is a draw (or short if it's bad) the light may barely glow or be brighter if the drain on the battery is high - now start disconnecting things or pulling fuses (mark them) to see if the light goes out, when it does go out that is your draw on the battery. Anything you've added to the car can cause this - Alarm, Stereo and Amps, etc...
If it is none of those try unplugging the connector to the Voltage Regulator for the Alternator. It's located on the radiator support to the drivers side of the radiator. It may be what was 'bad' in the first place - not the alternator. If the points have frozen shut the regulator will draw voltage all the time.

Good luck and keep us "posted" on what you find;

John

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post #6 of 6 (permalink) Old Mar 30th, 03, 08:39 AM Thread Starter
 
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thanks guys,today is sunday,a great time to take all your advices and put them to work.let you know what i came up with,thanks again for the info migs 69
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