Engine/Transmission (1998.5 - 2002) Alternator???

[DLausche]

This morning on the way to work I noticed my check gauges light was on so I checked the gauges and the voltmeter was low. I plugged in my digital voltmeter from the RV into the cig lighter and it was at 11. 1v. Figured I could make it to work and then charge the batteries for the ride home. Well, I got a few more miles and it was down to 9. 6v. Turned and headed for home. It was down to about 8. 5v and the gauges all went dead and it was really running weird and was shifting really oddly. Made it to the driveway and it died.



So, am I thinking correctly that it is the alternator that is likely the problem? Sure seems like that to me, but it has only 105k miles on it and I've read the alternators seem to go 200k+. The truck has been shifting fairly oddly the past several months so I am wondering if it is the diodes that are out. Can just the diodes be replaced easily or should I go with a rebuilt unit?



Also, how do I tell which model/brand alternator I have? I looked very briefly at it this am before stealing the wifes minivan and heading to work. It has a quick release harness/plug that goes straight into the back.



-Deon



On edit: Forgot to mention batteries are < 1 year old.

 

[B.G. Smith]

Remove the alternator and take it to an auto parts place and have it checked, sounds like that is the problem. Could just be the brushes. A few years back you could get diodes, brushes etc. for alternators but I don't know what is available over the counter now. A starter/alternator shop could rebuild but I would check on the price versus a rebuilt from auto supply first. bg

 

[DLausche]

It was the alternator. I lucked out after 3 auto places said they could not test it the last place said to go to the alternator rebuild shop around the block from their store. They had one in stock for $140. Very nice people to deal with. A&B Auto Electric in Burnsville, MN.



-Deon