Trailer / Rear Gate / Windows Electrical problem

[N8800SS]

So my 03 Sport recently decided to have a major electrical melt down.

These items do not work:

1. Power windows (all)
2. Rear Gate (no power at all)
3. Parking Lights (all)
4. Dash lights (illumination)
5. Constant 12 v power to parking light on trailer pig tail


What I have tried for each:
1. Fuses - (all, multiple times, visual and ohm/power check); window lock out switch , swapped relays
2. Fuses (all), getting power to ECU, swapped relays, unplugged battery and ECU for 10 min.
3. checked bulbs and fuses
4. checked fuses
5. Traced power (black/green wire) from pig tail all the way to source, constant 12 v throughout...


I know the rear gate ecu and lock mechanism can go on these vehicles. However, with the other issue described above I'm not convinced this is the problem. I found out about the trailer parking light issue when I hooked my trailer up and melted the wire on the trailer.

I'm at a loss on where to go from here... next stop: stealership....

 

[N8800SS]

I suppose I didn't ask a direct question... Anyone have any thoughts? Similar experience? Can the dealer diagnose the problem without throwing parts at it?

Thanks!

 

[N8800SS]

I guess I'm on my own...

I'll try to report back any findings.

 

[nocturnalenemy]

Wish I could be of help, but no idea where to start. Free bump anyway...

 

[Stuck CAPS]

So my 03 Sport recently decided to have a major electrical melt down.

These items do not work:

1. Power windows (all)
2. Rear Gate (no power at all)
3. Parking Lights (all)
4. Dash lights (illumination)
5. Constant 12 v power to parking light on trailer pig tail


What I have tried for each:
1. Fuses - (all, multiple times, visual and ohm/power check); window lock out switch , swapped relays
2. Fuses (all), getting power to ECU, swapped relays, unplugged battery and ECU for 10 min.
3. checked bulbs and fuses
4. checked fuses
5. Traced power (black/green wire) from pig tail all the way to source, constant 12 v throughout...


I know the rear gate ecu and lock mechanism can go on these vehicles. However, with the other issue described above I'm not convinced this is the problem. I found out about the trailer parking light issue when I hooked my trailer up and melted the wire on the trailer.

I'm at a loss on where to go from here... next stop: stealership....

Check for shorts in the body ECU. That's just a suggestion coming from here because the drl's/parkling lights are all in the body ecu, so i think all these other parts are, too. If not there, check for a major short coming from the battery to the main ECU.