Voltage fluctuates after truck is at normal temperature?

[R.Taylor]

Hi Everyone,
I noticed something today that struck me as odd. After 45 minutes of driving 25 miles... . Both freeway and city when I pulled up and put her in park I noticed the voltage drop down and then back up several times. Exactly like what it does on cold mornings when the heater grid kicks on and off. Not sure why the grid would turn on after the truck is at near 180 degrees. It was 40 degrees when I left... . The grid cycled and did it's thing when I started her up, It was 47 at the shop when I arrived and it seemed to start cycling as soon as I pulled up and parked.

Is this normal or is there perhaps an issue here?

R. Taylor
2006 2500 CTD Crew Cab with all the options minus power rear slider.

 

[Motorhead]

From what I have read on our site, that is normal as the grids react also to ambient air temperature.

 

[Bob4x4]

Hi Everyone,

I noticed something today that struck me as odd. After 45 minutes of driving 25 miles... . Both freeway and city when I pulled up and put her in park I noticed the voltage drop down and then back up several times. Exactly like what it does on cold mornings when the heater grid kicks on and off. Not sure why the grid would turn on after the truck is at near 180 degrees. It was 40 degrees when I left... . The grid cycled and did it's thing when I started her up, It was 47 at the shop when I arrived and it seemed to start cycling as soon as I pulled up and parked.



Is this normal or is there perhaps an issue here?



R. Taylor

2006 2500 CTD Crew Cab with all the options minus power rear slider.

There is a flash for the 06's with charging system issues



Bob