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Alternator removal? check?


Guest Anonymous

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Guest Anonymous

My 1976 has a Bosch AL89X alternator which i think might be shot. It was having a hard time starting a few weeks ago, very week start. I replaced the battery and that seemed to help but now i have a dead battery every morning. Its so bad that if i jump it, it will start ok but when i drive it almost 45 minutes to work, turn it off and try to start it, nothing. any ideas?

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Go to Harbor freight tools and get yourself a $5 digital multimeter and check the alternators voltage at idle and about 3000 RPM. My old alternator would only put out around 6 volts and would always drain my battery. My new alternator puts out a constant 12+ volts from idle to higher RPM's. Or remove it and have it checked at your local auto part store. I'd get the multimeter. It's always good to have one in your tool box anyway. Good luck!!

http://www.harborfreight.com/cpi/ctaf/displayitem.taf?Itemnumber=92020

David G.
1989 Volvo 240 Wagon "Da Brick" Daily driver
1992 Nissan Sentra SE-R "Hitomi" Sleeping. Waiting for NEO VVL!!
1976 BMW 2002 "Diana" The never ending project!!!

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My 1976 has a Bosch AL89X alternator which i think might be shot. It was having a hard time starting a few weeks ago, very week start. I replaced the battery and that seemed to help but now i have a dead battery every morning. Its so bad that if i jump it, it will start ok but when i drive it almost 45 minutes to work, turn it off and try to start it, nothing. any ideas?

The 02FAQ is here to help you.

http://www.bmw2002faq.com/content/view/36/32/

Chris B.

'73 ex-Malaga

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Chris - excellent post.

My experiences are documented on the tii registry website. In a nutshell:

Call around to see if parts stores have an older tester. The newer ones cannot test older alternators (and they won't have the correct plug).

Look for a local auto/marine electric repair shop. They specialize in this stuff and should give good advice.

Also - check the 2 screws that hold the regulator to the fenderwell. The regulator needs a good ground to work well.

And - my alternator wiring harness was somehow missing a 3rd wire from the regulator. It was charging, but I cut back the sheath and extended the missing wire to the back of the alternator.

Jim Gerock

 

Riviera 69 2002 built 5/30/69 "Oscar"

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This diagram might help. I had my 2002 for about 3 months and one day had some problems like you are having and it was only producing half the power. I got a hold of this diagram and it never was grounded. The alternators have rubber bushings so you have to have a ground wire from the ground post. Please see diagram.

02_charging.pdf

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