Lift Gate not working

Several sub-models/ engine sizes/ etc.

I need to sift through all of this to find the correct diagram for the system in "Prodemand"

easiest thing to get it right on my end is to enter in your VIN (sifting is immediate!)

Reckon you can send it to me?

These diagrams show all fuses/ relays/ stuff and their locations. Easy stuff to check is found quickly, the computer/ electronic stuff may need a pro to diagnose.

Your turn

The Medic

It sounds like the BCM is having a problem. That is why it needs to be reset, has it done it again?

Please let us know so it will help others.

Best, Ken

Yes, it sounds like a BCM problem. You may need to replace it.

Have any of the Modules/PCM/ or any body control computers been replaced at all since this started happening? Or have they just been checking the wiring in the vehicle?

And yes we need to know the sub model (ie, XL or not), engine size, 4 wheel drive or just rear wheel, please, this will aid us if in finding the right diagrams for this vehicle.

Do you want me too look into the wiring diagrams a bit more or are you okay for now? You can always come back anytime.

Is this the Hybrid model? Gas/ethanol?

Okay, I have to tell you up front this is a very complex system, it uses Data lines to communicate with the ECM and other control modules in the truck. Okay, so is the Lift Gate Window release switch working, the rear window wiper motor, or any lights on the dash on for any of this systems?

There also is a 175 amp inline fuse that protects the tailgate relay coming from the alternator. The relay for the lift gate is located in a fuse panel under the hood, here is a diagram of that also.

The rear wiper and window release switch get power from the same junction. That is why I ask.

There is also a Power Lift Gate Module (which may be the problem), this controls all the lift gate functions from the interior control switch. Yes its confusing, Its located somewhere in the left hand side of the cargo area. There are two wires that power this module, you can actually check them for power at their fuses if you would like. They are hot at all times. Here are those two fuses. Ones under the hood, the other is in the Ignition fuse panel, under the left hand side of the dash. LGM fuse and OBS fuse.

Here is a diagram of the control module for the lift gate, you can see all the switches and actuators go right to it. Just trying to show you what you're dealing with. This module may be the problem, but you have to make sure there is power to those two wires and a good ground first.

Please let us know what happen Wayne.

Best, Ken