Below 20 degs. Problems

[MVVorce]

I am having 2 problems with my truck when it is below 20 degs. and am wondering if anybody else is seeing this. #1 My heater control between defrost and floor don't like to work until it is above 20 and then it works fine. Dealer has parts on order for this problem. #2 My headlights will flash between headlights and foglights every once in awhile for no reason. When this happens the headlights go out and only the fog lights are on and I do not have the foglight switch on. This happens when on high or low beam it makes no difference and only when it is cold.

 

[CLAYTON]

No idea

 

[ddutil]

The lights are controlled by the Instrument Cluster's computer. I experienced a failure of the said cluster once: I pushed the flasher switch to right but the truck flashed left



Have your dealer check the cluster, and its connectors. In my case, they had to replace the whole enchilada.



HTH, Dan

 

[MVVorce]

Thanks for the information Dan. The mechanic at the dealer mentioned the cluster controller but said to see what happens for a while. I guess I will have to tell them to take a look at it.