A friend of mine bought a 08 3500 4x4 with the electric 4wd. It worked for a while and then it just quit one day. We replaced the switch and the tccm (transfercase control module). He even put in a new actuator in the front diff. I can't even communicate with the module with a tech 2. Can someone point me in the right direction or does anyone have some wiring schematics they can give me.
LMM: 08 won't shift into 4wd
- Thread starter gmac32
- Start date
Worked on a truck that the batteries went dead on, they jumped it off a 200amp battery charger and it fried the tccm and got a new and it had to programmed before it would work
checked all fuses and relays. we did not reprogram the tccm because we cant even communicate with it with the tech 2. we are pulling our hair out and I dont have much left anyhow
Not to derail but I have a very similar situation. Batteries died jumped it with a 300 start and ever since four wheel drive works half the time. How do I know if its my tccm for sure. Thanks in advance
This truck wouldn't work at all and the lights on the knob weren't on. I swapped one from another truck and it worked so we just bought a new one and took it to the dealer to have it programmed. Been fine ever since.