918dodge

Both battery's run 14.98 to 15.29 and it holds steady for about 2 mins when I 1st start the truck then you can hear it surge and see it in the dome light until I rev the truck a little

PWong

Are in located in a cold region with ambient temp below 66f?
The grid heater would cycle on off and cause the voltage surge.
The grid heater would stop cycling once you drive the truck over 15 mph.

As far as both batteries reads the SAME voltage you are fine.

918dodge

I'm located in Oklahoma it has been kinda cold but I keep my truck plugged in because I work on the road an I'm only home 2 days a week

PWong

You might not have the WTS light before start but the grid heater still operate after start.

918dodge

Anytime I have it plugged in I don't see the wts light but if Itsunami not plugged in the light will come on

918dodge

Thanks for all the advice this is my first diesel and I'm still trying to figure it all out

May Ng

I HAVE A 2007 DODGE RIGHT SIDE BATTERY OVERCHARGING THIS WHAT I HAVE TO DO? the cables between the batteries from left to right is not making contact or is intermittent resulting in overcharging the battery on the right............................. so hears the deal I,am replacing all battery cables WITH OEM PARTS AT THE DEALER SO ITS under warranty.......................................... ........................................ and getting my old parts back from the dealership TO INSPECT
MYSELF .................................................. .................................................. .... but I am also backing up those OEM cables with new one's that I will make my self, in a sense a failsafe cable system grounded to a different location A $835.00 JOB FROM THE DEALER OOHHHH ****BUT IF YOUR HANDY YOU CAN FIX IT FAREWELL FRANK

PWong

It's working as designed.

918dodge

I've been thinking about doing that too I just hate taking my truck to a dealership and having them charge so much for things I think I can do with a little help from Google lol

May Ng

I DO UNDERSTAND BUT HEARS THE THING THE ALTERNATOR CHARGES THE BATERY ON THE RIGHT? YES THE CABLE RUNS ALONG THE RADIATOR AND OVER TO THE LEFT OR DRIVER SIDE BATTERY? YES THAT CABLE IS BAD BUT CHECK THE GROUNDS AND IF POSSIBLE BACK UP THE GROUND LINES TO DIFFERANT FRAME LOCATIONS And make sure all connections are clean and tight frank

918dodge

I figured out my problem i needed a bigger key power source I just used the pink with the yellow stripe it's 10 gauge wire hooked it up and put a relay to the voltage regulator and truck runs like new thanks for all the help