The past few mornings it's been 25 degrees here. I go and start my truck to let it warm up a little and get the frost off the window. Normally the grid heater will cycle after I start it for a few minutes this morning and yesterday it only cycled one time. It did cycle before I started the truck and one time after but that's all. I didn't have the truck plugged in. Is this normal or do I have an issue? 

No, that no normal.  Is the wait to start light coming on?    Do you have any codes?

No codes and the wait to start light comes on and stays on for a bit then goes off. Starts like it should. 

How do you tell if it's post cycling, are you watching v gauge or just the tone of motor

Only way to cancel post heat is to exceed 25 MPH or allow it to idle more 5 minutes.

I can hear the change in sound and see the lights dim as I am walking the dogs.  Maybe i just wasn't paying enough attention but I swear it only cycled one time this morning and yesterday. Really weird. 

I reckon i wasnt paying enough attention. It done fine this afternoon after work. Maybe it was just me. Sorry guys! 

It's cool at least you asked questions and found out...

5 hours ago, Mopar1973Man said:

Only way to cancel post heat is to exceed 25 MPH or allow it to idle more 5 minutes.

Or another mystery switch from @IBMobile when he decides to Spill the Beans 

I guess so! I Hate to waste yalls time tho! I need to hurry up and get me a quadzilla so I can get high idle, get better mpg, and better monitor stuff.  Thanks again! 

Heck maybe toss in OBDLink LX too in the pile. Helps with diagnostics and error code erasing.

If the grid heaters ever arent cycling then it should trigger a code...

4 hours ago, Mopar1973Man said:

Heck maybe toss in OBDLink LX too in the pile. Helps with diagnostics and error code erasing.

Probably not a bad idea!