Burning Smell in Cab

[Torq_Shep]

I have recently developed a burning smell in the cab, and I am curious to see what theories evolve here.

 

- Smell develops after ~15 minutes of driving. 

- No visible smoke.

- Smells very akin to burning brakes.

- I usually am not running the blower motor. It has been very moderate temps here. 

- I usually am not driving at night.

- Could be clutch starting to go but I am not ragging on it and am not lugging the engine. Tach follows vehicle speed when in gear. 

 

All of the wheels are cool to the touch. When I pop the hood, no smoke comes from underneath. When I leave it running in the driveway I do not appear to have any major leaks (like rear main on the exhaust pipe...). 

 

I don't have a ton of time to dig into it right now, so it is mostly sitting parked. I might get a few hours this weekend to look at it but figured I would ask for common things. This thing has so many things wired into the cab that I would not be surprised if it is electrical, but it smells different than the overheating speakers from the likely overpowered amplifier (another thing I have not fixed =P).

[pizzaman09]

Burning electrical and hot brake/clutch material do smell about the same.  Look at the wiring under the dash for sure.  Also check to see if anything that shouldn't be is running against the exhaust.

[Gjeep]

Don't know you're truck but only time I've smelled burning plastic in an MJ and XJ was the HVAC control connector to fan speed selection. Both Jeeps were over 200K at the time.