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Old 09-10-2010, 10:20 AM   #1 (permalink)
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Default 1989 B3 Audi 80

Hi Guys i just got a 1989 audi 80, which has been garaged for 20 years, its an American Spec. car, it only has 70000 Km on it, its an automatic car, but i replaced the org. 3 speed gear box (due a mechanic error, when he put the wrong oil in it which fried it) with a 4 speeder from a b4 model, the car was runing fine till last week, when while your driving all the lights go weak & radio keeps restarting then is turns off and then there is no power until i change the car battery (yes change the car battery with a new one), i checked the alternator but it seems to be working fine, can any one think of any thing to guide me through this....thanks
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Old 09-14-2010, 10:07 PM   #2 (permalink)
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The alternator may seem to be charging at idle but it may not be putting out enough amperage at road speed or under a load. I would take it to a local auto parts store and have then test it just to be sure. Also make sure your ground/earth connection from the battery to the frame is clean and tight.

Good luck and the car looks great.
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Old 09-22-2010, 11:25 PM   #3 (permalink)
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I agree...the alternator may be fine at idle but under load is not doing it's job. I would replace the voltage regulator on the back of the alternator and see what happens...somewhat cheap expense and you might get lucky...post back. Cheers!


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Old 09-23-2010, 05:53 AM   #4 (permalink)
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Thank you very much guys, for your quick & kind replay's, I had my trusted electrician look at it, and he confirmed that the voltage regulater is indeed the issue, but it doesnt need to be changed, all it needs is cleaning, and thats what he did inc. cleaning the contact ends by sand paper, and its been trouble free ever since...
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Old 09-30-2010, 04:27 AM   #5 (permalink)
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I would take it to your local (Honest) garage mhashim.
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