Doing the WT ground mod

[Rather Be Wheeling]

I live in Cali and my grid heaters deleted. I only throw a code in the winter with hard starts. Other than that it doesn't show up. You should be fine

[Doubletrouble]

 Since unhooked this morning no issues, no warning lights either. 

[Haggar]

As long as the relays stay in place, and you just unhook the main power lead, you will not show an error in the PCM.

 

The computer is kinda stupid.  It only checks that there is resistance in the control circuit.  (that is how it knows there are relays there to be cycled.) It does not CONFIRM that power flows from the battery to the grid heaters. 

 

So basically, if you leave the relays in place, the computer thinks everything is kosher.  It doesn't know you have it relaying nothing.....

 

Hag

[Doubletrouble]

 I'll leave them unhooked for now, I will get them replaced before long but leave them.unhooked until the weather requires them again. No sense in straining the batteries if not needed.

[Mopar1973Man]

Nothing to worry about... Grid heaters for Idaho are only suggested to be used from October to April. After April I typically just unhook the grid heaters its just a waste or power.