I'm working on a 35amp Motorola alternator attached to an A4. It's not charging the batteries while in the boat but was taken to a shop and tested ok on the bench.
When I put a meter on the + lead on the back of the alternator with the engine running I can read 12 volts but I assume this is from the batteries.
From the regulator there seem to be 3 other connections.
1 Yellow wire with a black plastic connector going to the coil(positive I presume).
2 Brown wire(I think) grounding reg to the case.
3 Green (I think) running off somewhere else I should know but I don't.
So assuming the bench test was accurate and the alternator is good what other testing can I do to troubleshoot this issue?
I plan on metering the positive alternator connection again with the engine and ignition off then just ignition on to prove that the connection to the batteries is good(no bad fuse etc).
I also plan on metering the positive alternator connection with the engine running and the wire to the battery disconnected to see if it produces any voltage(I expect it wont).
Any suggestions would be appreciated
When I put a meter on the + lead on the back of the alternator with the engine running I can read 12 volts but I assume this is from the batteries.
From the regulator there seem to be 3 other connections.
1 Yellow wire with a black plastic connector going to the coil(positive I presume).
2 Brown wire(I think) grounding reg to the case.
3 Green (I think) running off somewhere else I should know but I don't.
So assuming the bench test was accurate and the alternator is good what other testing can I do to troubleshoot this issue?
I plan on metering the positive alternator connection again with the engine and ignition off then just ignition on to prove that the connection to the batteries is good(no bad fuse etc).
I also plan on metering the positive alternator connection with the engine running and the wire to the battery disconnected to see if it produces any voltage(I expect it wont).
Any suggestions would be appreciated
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