voltage change
Thread Starter
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Freshman User
Joined: Aug 2006
Posts: 42
Likes: 1
From: Roswell, GA
voltage change
My lights, and electric fans rev.. like a power surge.. So, I checked the voltage with a volt meter and found the voltage to go from 14.+ to 12 (at which time it slowly decreases.. point of contact neg to bare metal, pos to back of alt... had alt rebuilt by a reputable source and same problem.. if the Alt was dead, then my tach would be irratic and die.. what else could I look at.. ? Not looking for specific truck issues.... been around that post.. just generally what can create this type of issue.. would a new alt even be a possible solution..
Thread Starter
|
Freshman User
Joined: Aug 2006
Posts: 42
Likes: 1
From: Roswell, GA
thanks... Its an internal Regulator, had it replaced when rebuilt. One other tid-bit, the rebuild shop did not get it to fail during thier pre-test, but they did feel the rebuild was needed. so not worried about that. The idle, if that means the tach rpm's, they read correctly(600-650 on idle). I also was expecting a dead battery issue, after running it a while, but have not had a problem. I'll look into the other items.
Moderator
Joined: Jan 2001
Posts: 57,005
Likes: 2,750
From: Virginia
If it's doing the same thing it did before you took it to get it rebuilt, I would suspect you still have an intermittent problem they didn't catch. Something that is not a normal wear item like a intermttent coil winding. If you don't find anything else, I believe I would buy a new alternator.
