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1996 STS
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12 Posts
Discussion Starter #1
Ok guys I'm in major trouble here. Last night I was working on my father's 1996 Cadillac STS. The keyless entry wasn't working, so I was messing around with the RFA module behind the rear seat. Ended up grounding one of the wires on the connector for that module, blew a fuse behind the rear seat. Replaced fuse. Everything works fine in car.

I go to start it, starts fine, everything is fine, except I get the BATTERY NO CHARGE warning. Check voltage at battery, its 11 something, not getting any charge. Only code present is IP1911. The closet thing I could find in the code page was B1911 - Generator L-Terminal Problem.

Check battery with voltmeter and at an auto store, checks out fine.

Its possible but highly unlikely that the alternator happened to go out by coincidence. I'm thinking I blew a fuse/relay something somewhere. Maybe the one that tells the alternator to "turn on". Please help me out. What can I check before pulling the alternator?

Thanks in advance.
 

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Registered
1996 STS
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12 Posts
Discussion Starter #2
Does anyone know the wires on the plug on the alternator? Can I test them with a multimeter to see if the alternator is getting the turn on signal?
 

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1926 Model T street rod, 2000 Jaguar XJ8, 1999 Corvette.
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6,738 Posts
The thickest fat wire should have 12 volts at the alternator. Thats the 12 volt "exciter" wire that signals the alternator turn on.
 
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