Ok electronic gurus, I have a problem and I would appreciate some help.
My car is a M30 swapped turbo'd monster that I can not drive because it refuses to charge. I have checked the common items but I will admit that I assumed that it was a faulty +/- 30 year old alternator so I replaced it with a Bosch AL129X 115amp alternator which is identical to the original M30B34 alternator.
So here is where I am,
New Battery
New Bosch starter
New Bosch alternator
12.2 volts at the battery and thats with it running or ignition off.
1.9 volts at the exciter wire on the back of the alt with the key on
Battery warning light in the dash works well BUT... when the battery voltage dropped on me while driving home at night from out of state 2 weeks ago the battery dummy light never came on. Luckily I have the LCD voltage display in my car so I had the unfortunate experience of watching the voltage count down to my doom which ended up being exactly 8.9 volts at which point the car started to run like crap and shut down.
That was when I got the new alternator. I installed it and still no charge. And thats when I checked the exciter..... 1.9v. And thats when I went to the ETM to find out about the warning light, which comes on when you cycle the ignition switch.
Update: still not resolved but more information.
I checked for voltage at pin 1 on the c101 chassis side of the connector with the key on and the c101 disconnected. I have battery voltage at that point (12.4v). I then connect the c101 and I check for voltage on the engine side of the connection and I come up with 1.9v. Thinking I have a bad connection I once again checked the chassis side with the c101 connected and it now only has 1.9v.
Is my blue wire grounding out? What would cause a 10 volt drop in power going through the exciter wire when the c101 is connected?
My car is a M30 swapped turbo'd monster that I can not drive because it refuses to charge. I have checked the common items but I will admit that I assumed that it was a faulty +/- 30 year old alternator so I replaced it with a Bosch AL129X 115amp alternator which is identical to the original M30B34 alternator.
So here is where I am,
New Battery
New Bosch starter
New Bosch alternator
12.2 volts at the battery and thats with it running or ignition off.
1.9 volts at the exciter wire on the back of the alt with the key on
Battery warning light in the dash works well BUT... when the battery voltage dropped on me while driving home at night from out of state 2 weeks ago the battery dummy light never came on. Luckily I have the LCD voltage display in my car so I had the unfortunate experience of watching the voltage count down to my doom which ended up being exactly 8.9 volts at which point the car started to run like crap and shut down.
That was when I got the new alternator. I installed it and still no charge. And thats when I checked the exciter..... 1.9v. And thats when I went to the ETM to find out about the warning light, which comes on when you cycle the ignition switch.
Update: still not resolved but more information.
I checked for voltage at pin 1 on the c101 chassis side of the connector with the key on and the c101 disconnected. I have battery voltage at that point (12.4v). I then connect the c101 and I check for voltage on the engine side of the connection and I come up with 1.9v. Thinking I have a bad connection I once again checked the chassis side with the c101 connected and it now only has 1.9v.
Is my blue wire grounding out? What would cause a 10 volt drop in power going through the exciter wire when the c101 is connected?
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