Hi All,

I have a 2005 SUT that has a fluctuating voltage issues. It started out of no place, I left the car along for about 8 days and the battery was dead – no accessories/lights were left on so I jumped the car and went on my way. I have checked the battery terminals, one was loose - tightened it - but there were still swings in the voltage. I replaced the alternator, swapped out the battery, checked accessory connections and it still swings.

Does anyone have an idea of what could be wrong? I’m kinda stuck…

Thanks

 

what does "swing"mean?
are u saying you can see it go up and down ,as you just sit there running?
on the h3 there is a control line from bcm i think,to the reg control,like an enable.
just from memory when i looked at something a while back.

more info....