Alternator

[jimma]

i have a 1992 318is my alternator was pushing out 17v on my meter. I went out bought another one. my car runs for about week and the alternator dies. went and got another one thought it might have been a bad alternator but it did again week lata. i have know idea what it could be

[victorgallas]

Originally posted by jimma@Aug 15 2005, 07:49 PM
i have a 1992 318is my alternator was pushing out 17v on my meter. I went out bought another one. my car runs for about week and the alternator dies. went and got another one thought it might have been a bad alternator but it did again week lata. i have know idea what it could be

[snapback]369807[/snapback]

Since your previous alternator outputed 17v your battery got fried, prety much it wont hold any more charge. I am amazed that you did not fry electronics.

Anyway replace the battery too, and make sure all electrical conttacts are clean and tigh..

have fun

[jimma]

yea i replaced the battery and i ran new wires for grounds they were old but it still does not work im hopping i didnt fry the computer

[victorgallas]

Originally posted by jimma@Aug 16 2005, 12:46 PM
yea i replaced the battery and i ran new wires for grounds they were old but it still does not work im hopping i didnt fry the computer

[snapback]369964[/snapback]

I dont want to scare you, but if you reach 17v that is enought to fry 12v circuitry,

Altouhg most electronic car computers will sustain such voltages. Look for some relay. BMW uses bosch diode relay, they are designed so that they will not work if there is reverse polarity or high voltage. Most likely you fried the DME Relay together with some other main relays, look for burn fuses, and relays.

Hope this helps.