Hey guys I just had to jump my truck this evening, which I haven't had to do with this truck since I bought it two years ago. I put my multimeter on it and it only seems to be charging around 12.5-13 volts, which I know means that the alternator isn't charging properly. I was wondering if I should rebuild it, get a factory replacement, or if any of you all knew of any performance alternators that would be comprable in price to a factory one?

 

Could be your voltage regulator, too. Check that it's grounded well and re-check your charging voltage. It's always good to have a spare behind the seat.

 

Before you buy a alternator you might want to check your voltage regulator. Its on the fire wall and ther are notorious for going out . And they are about $13.00

Charliex25

 

I agree with Charlie about the VR.

Also, charge your batteries overnight, let them sit for 6 hours without starting the truck. Measure the voltage of the battery and if it is lower than 12.3 your batteries are toast, won't hold a charge.

The alternator may be only putting out 13v cause the battery is soaking up the extra voltage charging.

You can replace the brushes in your alternator and save some bucks.

 

thanks guys, I just haven't had time to go out an check it yet, I also don't have a charger, so I can't charge it over night.