The only lights that come on when I turn the key on are the oil pressure and water in fuel light, then the WIF light goes off.

 

your grid heater aint working then phil.....

 

been going forever without it.
I'll figure it out one day

 

I'm gonna have to disagree with you there, bud.

The grid heaters are set up to cycle once the air temp is at 59* or below. Depending on temp they may cycle one or both. Once the truck is started they may continue to cycle, one, both or alternate between the two until the intake temp is where it needs to be.

Mine will usually cycle one or 2 more times when it's 20* or colder.

 

1st gens are different I do believe.

 

I don't own a 1st Gen and haven't had time to look at shortman's and compare to my system but-

Dodgeram.org says-

http://dodgeram.org/tech/dsl/FAQ/cold_wx.htm

Alldata says-

OPERATION

The air intake heater system uses relays and heaters, controlled by the electronic controller, to preheat the air before it enters the combustion chamber. The relays purpose is to ENERGIZE the air intake heaters so that they can warm the incoming air as it enters the intake manifold. The air intake heaters can be ENERGIZED before and/or after engine cranking, depending upon the intake manifold air temperature. The electronic controller receives a signal from the charge air temperature sensor that indicates the air intake temperature. If the air intake temperature is at or below 59°F (15°C) the electronic controller will start the air intake preheat or post-heat cycle.

PREHEAT CYCLE

The air intake preheat cycle will start if the following conditions exist:

* The ignition switch in in the ON position.
* The electronic controller has not received a crank signal.
* The air intake temperature is at or below 59°F (15°C).

If the preheat cycle is started, the electronic controller will illuminate the Wait-To-Start lamp. Once the preheat cycle has finished, the Wait-To-Start lamp will go out, and the engine can be started.

If the electronic controller receives an engine crank signal while the preheat cycle is running, the air intake relays will be DE-ENERGIZED causing the preheat cycle to be aborted.

POST-HEAT CYCLE

The air intake post-heat cycle will begin if the following conditions exist:

* The engine has been started and is running.
* The air intake temperature is at or below 59°F (15°C) when the ignition switch was turned ON.

The intake air heaters have two different modes of operation depending upon the intake manifold air temperature, either both heaters are ENERGIZED or they are cycled ON and OFF individually (while one is ENERGIZED the other is not and vice versa). The amount of time that the air intake heaters remain ENERGIZED depends upon the intake manifold air temperature.

 

I did some more digging around the net and found these little links which appear to be page scans from the Dodge FSM-

http://dens-site.net/Dodge_CTD/Grid_...alSup-14-5.jpg

http://dens-site.net/Dodge_CTD/Grid_...alSup-14-4.jpg

And some other good info:

http://dens-site.net/Dodge_CTD/Grid_Heater_Relays/

Based on all of these it looks like the 1st and 2nd Gens share the same operating parameters. The relays look different though from what I remember mine looking like.

 

Thanks.