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Originally Posted by billrei
I just went through a weird experience with the charging system of my 1980 300TD. On Weds on my way to work I found that the radio and then the blinkers were not functioning I thought at first it was a fuse. That night when I went to leave the battery was completely dead. I jumped it and started home. I found if I put on anything more than the headlights everything dimmed out. However the alternator light never came on at any point. When I got home I put the battery on charge and after a half hour there was enough charge to start the motor. I cleaned the contacts on the alternator and found that the belt seemed somewhat loose so I tighten it. I left the charger on to get a full charge. The next morning the battery showed 13.0 volts with the engine off. After starting I got 14.8 volts at about 1,000 rpm. Reving it did not raise the voltage any higher. I drove to work and when I arrived I check the voltage again at 1,000 and it read 14.6 volts. Has anyone had experence with a Bosch built in voltage regulator failing with a high voltage level? I'm going to throw in another alternator I have as a spare and see what happens over the weekend.
Go Patriots!!!
Bill
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It must be that time of year, Bill. My 190E did the same thing. At first, with lots of electrical accessories on, I did get a very dim glow from the voltage idiot light in the dash. As it got worse, though, the light stayed off. This all happened over a couple of days. My car died as I coasted into a parking spot at the local pizza place (luckily!), so I got a ride home, pirated the battery from the Mustang, and drove home on the battery alone. I have an alternator on the way to swap that out (it was cheap, so I bought the whole alternator rather than just the voltage regulator).
I'll send you good karma for your repair if you'll do the same for me! Ha ha...
Good luck,
Chris