truck not charging

rawdog

rawdog

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Jan 28, 2007
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I have a 96 auto that periodically goes dead for no reason and along with that wont shift properly.I also get a GEN light on the dash from time to time. Any ideas?
 
Bad alternator or batt cable regulator/exciter wire connection issue.
 
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Guages work,the batterys charge but will drain down at night.Doesnt appear to have a draw when batterys are re connected and the batterys draining is an intermittent problem. Mainly when the cold weather hits. The volt gage doesnt appear to be over 12 volts but when the GEN light comes on it goes over 14 volts and the truck wants to shift but doesnt. ECM?
 
If its a bad alt, whats up with the GEN light and the trans shifting?
 
Battery cables are new and the truck is our service truck for my HVAC business so sees minimal travel and off and on.Maybe 8000 per year
 
The GEN light means the alt isn't working properly. Trans shifting could be a result of the alt issues.

Most parts stores will test an alt for free. Since it's an easy job, just take it out and go to a parts store. If it's bad, buy a new one while you're there. If it actually does test good (doubt it), then go back and check more connections, etc.
 
Rawdog, did you ever get this issue figured out? Could it be a belt tensioner?
 
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