We had a 2008 Dodge Grand Caravan which developed similar, seemingly random communication issues. After a lot of troubleshooting, they would always come back to one of the 22GA communication wires breaking near a point where the cable would flex. I fixed two such issues, one in the driver's door flex area (replaced the door harness with new) and one at the ABS computer (patched it up with a new piece of wire.) The car had about 100,000 miles and lived in Michigan. What was happening was the wiring harnesses were getting brittle and conductors were starting to fail in different places around the car.
I have to admit that this spelled the end of the car for us. Replacing all of the wiring harnesses in a modern car is not a feasible project for most people, and it certainly looked like that's what this vehicle would eventually need. I couldn't consider the car to be reliable anymore with electrical issues likely to pop up at any given time. So we sold it. It seemed like the only reasonable thing to do.
Hope your luck with your Magnum is better.
I have to admit that this spelled the end of the car for us. Replacing all of the wiring harnesses in a modern car is not a feasible project for most people, and it certainly looked like that's what this vehicle would eventually need. I couldn't consider the car to be reliable anymore with electrical issues likely to pop up at any given time. So we sold it. It seemed like the only reasonable thing to do.
Hope your luck with your Magnum is better.
