mtu1293
Senior Member
I've mentioned this in my build thread, but starting its own topic here on the PW forum as well. This is on my 2019 PW
Ever since I've owned the truck (1 year now) I've gotten a random SERV 4WD light that comes on. Mainly when just driving in 2wd, 90% of the time it clears once the truck is shut off and restarted. I've had at least three times in a year where the light hasn't cleared with restart. Of the three times, it cleared with the truck still running. Unfortunately it is out of warranty - miles wise.
Typically hasn't been much of a concern, but it did almost burn me once. I was doing a rescue of two vehicles stuck on a muddy trail, and the light came on. Of course needed 4x4 at the time, so it got a little interesting for a bit. Was backing down a 2 rut trail, and all of a sudden light went away and I got my 4x4 back.
- Does this randomly, mainly when in 2wd. Can be nice out, raining, snowing, warm / cold, driving straight, turning, slow speeds, highway speeds. etc
- Tcase does shift into 4low, but with the light on axle doesn't connect so technically in 2low
- checked wiring connections: made sure they where snapped in and no frayed wires.
- Sometimes goes months without coming on, other times happens multiple times in 1 day.
Few weeks back the light came on while in town 4 times within 30min, so on the way home I swung by the dealer. They where able to check it right then, and the tech said it was giving a tcase fault. I always assumed it was the front axle disconnect motor causing the problem. They wanted to check all the wiring so I scheduled an appointment, figuring I might as well start somewhere. They checked all wiring, and found no definite issues, so they are trying to say MOPAR says tcase not serviceable and to replace at $1800. The one thing they did find was a corded pin on the wiring (crossing fingers that could be it). So they concluded if that doesn't fix it, they say replace the tcase.
Even though there is a tcase position sensor, as well as the electric actuator for front axle disconnect. I still have a feeling it is one of those two, either makes sense in a way. That is if the light comes on again, after cleaning the corroded pin.
Guess mainly just looking for any advice and/or if someone else has had this same problem.
Ever since I've owned the truck (1 year now) I've gotten a random SERV 4WD light that comes on. Mainly when just driving in 2wd, 90% of the time it clears once the truck is shut off and restarted. I've had at least three times in a year where the light hasn't cleared with restart. Of the three times, it cleared with the truck still running. Unfortunately it is out of warranty - miles wise.
Typically hasn't been much of a concern, but it did almost burn me once. I was doing a rescue of two vehicles stuck on a muddy trail, and the light came on. Of course needed 4x4 at the time, so it got a little interesting for a bit. Was backing down a 2 rut trail, and all of a sudden light went away and I got my 4x4 back.
- Does this randomly, mainly when in 2wd. Can be nice out, raining, snowing, warm / cold, driving straight, turning, slow speeds, highway speeds. etc
- Tcase does shift into 4low, but with the light on axle doesn't connect so technically in 2low
- checked wiring connections: made sure they where snapped in and no frayed wires.
- Sometimes goes months without coming on, other times happens multiple times in 1 day.
Few weeks back the light came on while in town 4 times within 30min, so on the way home I swung by the dealer. They where able to check it right then, and the tech said it was giving a tcase fault. I always assumed it was the front axle disconnect motor causing the problem. They wanted to check all the wiring so I scheduled an appointment, figuring I might as well start somewhere. They checked all wiring, and found no definite issues, so they are trying to say MOPAR says tcase not serviceable and to replace at $1800. The one thing they did find was a corded pin on the wiring (crossing fingers that could be it). So they concluded if that doesn't fix it, they say replace the tcase.
Even though there is a tcase position sensor, as well as the electric actuator for front axle disconnect. I still have a feeling it is one of those two, either makes sense in a way. That is if the light comes on again, after cleaning the corroded pin.
Guess mainly just looking for any advice and/or if someone else has had this same problem.