Voltage regulator failed in my Alternator
#16
Moderator
WELL my nephew replaced my alternator with a rebuilt one, and guess what, still not charging... took it to Richardson Generator and they said, YEP, not charging... and said probably the wiring plug (3 prong) on the back of the Alt, was bad.. said they are very hard to get off and it is probably broken... they ordered one, said next tuesday or wednesday they would have it.. had them recheck the old alternator, and it checked out OK, no problem... my question is, I have owned this car for over 4 years, if that plug is bad, how did it get that way?
looking for answers??
here is my takeoff...
looking for answers??
here is my takeoff...
In my past experience, I found leaking engine oil from the valve cover gasket caused your type of problem. Some ingredients in the engine oil damage the connector. You know engine oils contain sulfur and others to prevent bearing damages. Those increase the contact resistance and the built up heat there damage the contacts more and more causing the housing bad too. Check your generator carefully, it must have some engine oil not the PS oil there. The PS oil kills the slip rings and the engine oil kills the connector, according to my experience. We need to pay some attentions on alternators not to drop any oil.
Last edited by Yamae; 04-10-14 at 06:41 PM.
#19
I second that... great people that do good work.
#20
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Reason I ask is I just had the same problem yesterday and recharged the battery myself before taking to AutoZone (where I bought the battery) where the manager said via his hand held device the battery was fine but the voltage regulator was bad.
My plug housing broke before and I went to Pull-A-Part and found the same plug used on many Toyota Camry models and I cut off the cable there and spliced it into the Lexus. Repair $1.00
#21
When you say it was the three prong plug that was the problem then what did you do? Was the plug just gummed up or need cleaning to create good contact or did you replace the plug all together?
Reason I ask is I just had the same problem yesterday and recharged the battery myself before taking to AutoZone (where I bought the battery) where the manager said via his hand held device the battery was fine but the voltage regulator was bad.
My plug housing broke before and I went to Pull-A-Part and found the same plug used on many Toyota Camry models and I cut off the cable there and spliced it into the Lexus. Repair $1.00
Reason I ask is I just had the same problem yesterday and recharged the battery myself before taking to AutoZone (where I bought the battery) where the manager said via his hand held device the battery was fine but the voltage regulator was bad.
My plug housing broke before and I went to Pull-A-Part and found the same plug used on many Toyota Camry models and I cut off the cable there and spliced it into the Lexus. Repair $1.00
#22
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Thanks for your help.
#23
Moderator
IG to Ignition circuit for the field coil current + regulator.
S to the battery for a voltage sensing.
#24
NOW once again, the little plug you take into your hand (get the picture) and push into the back of the alternator, was my problem, they ordered a new one, put it on, plugged (with their hands) it into my alternator, and it worked, and is still working. sorry no photo.
#25
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YOU are making this hard, (if you dont understand, get professional help)
NOW once again, the little plug you take into your hand (get the picture) and push into the back of the alternator, was my problem, they ordered a new one, put it on, plugged (with their hands) it into my alternator, and it worked, and is still working. sorry no photo.
NOW once again, the little plug you take into your hand (get the picture) and push into the back of the alternator, was my problem, they ordered a new one, put it on, plugged (with their hands) it into my alternator, and it worked, and is still working. sorry no photo.
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