Question about Cars & Trucks
On these vehicles the charging system is controlled by the PCM / the cars engine computer. would need to check if you are getting a signal from there to turn on the alternator. i have seen in the past where the connector at the alternator has broke or is loose. But i also have seen when the Stepper motor on the instrument cluster goes bad the gauge shows it not charging and the battery light will come on. if this is the case then you should give this company a shout.
Posted on Apr 21, 2015
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Posted on Jan 02, 2017
Hi, I can't tell you exactly what is wrong because there is too much involved at this point, what with 2 shops working with it, but I can give you some advise on what else to check. On the alternators and the wiring that supports them a small volt charge is taken off one of the slip rings, where the brushes ride, for the purpose of turning out the light. As I remember, this is a yellow wire that runs back to the dash.
To the alternator, it would be one of the wires that plug into the side of the alternator case.
Posted on Nov 27, 2008
Did you test the Alternator on or off the truck? It might be a problem with the control system to the Alternator. The regulator need a battery feed to work, It is usually ran through an alternator fuse.
Posted on Mar 11, 2009
verify the belt tension-er is staying tight and not floppy around at higher RPMS,or the belt is not slipping ,have the alternator checked at higher RPMS not at an idle.the last is make sure the single wire little wire connector is tight
Posted on Nov 22, 2009
Disconnect battery ground for 30 seconds & reconnect. Light should be out unless you have deeper diagnostic problem. Charging system good Battery good. This action should reset trouble light. Good luck!
Posted on Dec 29, 2009
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