Quote:
Originally Posted by benz fanatic
About 2 weeks ago my battery went dead. The battery is fairly new so I suspected my alternator. I charged the battery and it was OK for a day or two and went dead again. I checked the alternator and it was not charging. I charged the battery again and drove the car. I noticed that the windows were working well (for no charging) so I got home and checked the voltage again and now it was at 16.7. I changed the regulator from a known good alternator on my shelf and viola!, 13.8 volts. All was fine for a week now. I put an aftermarket radio in today and it kept shutting off. Finally I realized that it shut off everytime I accelerated. I turned on the lights and blower fan and that ended that. So... it's over charging again. I noticed in a picture of a new alternator that it had a ground tab beside the main plug. I do not have that. Could that be making it over charge? I hate to buy a new regulator, when I'm sure the one I put on was fine. Can anything go bad in the alternator itself that causes this? Thanks, Andy
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Andy,
You need to clean all the connections, not just on the outside, both 1/2s need to show bright clean metal. Your earth strap likewise.
Is the idiot light coming on when you turn the key & then going out when the car starts?
Please report back after cleaning & tell us what the red light on the dash is doing.
__________________
Grumpy Old Diesel Owners Club group
I no longer question authority, I annoy authority. More effect, less effort....
1967 230-6 auto parts car. rust bucket.
1980 300D now parts car 800k miles
1984 300D 500k miles 
1987 250td 160k miles English import 
2001 jeep turbo diesel 130k miles 
1998 jeep tdi ~ followed me home. Needs a turbo.
1968 Ford F750 truck. 6-354 diesel conversion.
Other toys ~J.D.,Cat & GM ~ mainly earth moving
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