Hi,
I'm new here and all ready need help. I picked up mu 06 Ram 2500 4 days ago havent started it for 2 days. This evening I started it and the voltage went up to 15-16 and then I hear a click and the voltage dropped to 12.5-13 the click back up to 15-16. The Lights dim and get bright each time. This cycled several times and then stopped. It remains charging at 15-16. It did occur with engine off initially while in vehicle with interior light on. Noticed the dim/bright. Any direction is appreciated.
Thanks
David

 

This is a normal occurance. It is caused by the grid heaters cycling off and on causing a large voltage draw. Usually happens after the truck has sat for a while or it is very cold outside.

Totally normal.

 

Thanks!
David

 

This information might also be in the owners manual

 

hello,
i understand about the grid heaters. my question is that my truck seems to charge at about 15-16 amps. this seems high, no? i thought the normal was about 14 amps. the manual states that if the voltage is too high a chime will sound. have not had any chimes. just seems 15-16 is high.

what do you think?

david
socal

 

The guage reads in volt, not amps. The charging voltage is dependant on battery temp but that is within the normal range.

 

sorry, ment to say volts. hell, if the alt was only putting out 16 amps i think my truck would be in trouble.

good to hear tht the 15-16 volts is okay.

socal