I have a 2006 Dodge Caravan that when I drive at highway speeds and it’s wet out, my air bad light comes on and about 50% of the time, the radio, fan, windshield wipers, and 12v outlet stop working suggesting the fuse or some other wiring is getting wet. The dealer cannot replicate and will not suggest any fixes. What do I have my local mechanic replace or seal?
I know there’s a Chrysler recall on 2005-2006 Caravans, #J38, but my Caravan falls outside the specs by 2 mths (it was for vehicles in service between Jan 2005 and April 2006).
When dry and the air bag light is out, if you can find the front air bag sensor, I’d wrap a baggy around it to keep water off. Then see what happens the next time it rains.
The problem could be due to a power input problem to the BCM module. Power from fuse 23 passes through the ignition switch and then to the BCM. Verify those areas are okay while the trouble is happening.
To make the trouble appear you might try running the vehicle through a car wash that also cleans the underside of the vehicle. Using a screwdriver handle to tap on suspected trouble areas is another way to help find intermittent problems.
We had a 2008 caravan, after 6 or 7 trips to the dealer with no real diagnosis. They just said that it seems that the various control modules could not talk to each other. They ended up buying that van back from us.