Jim:
Thanks for the reply. Here is what I know so far:
1) My code reader will not read any codes from the 4x4 module.2) The problem only happens when the car is very cold, overnight on a freezing night. If it doesn't get cold, the light does not come on. The coorelation to cold nights is pretty strong.
3) The light can be reset by removing the 4x4 fuses (#17 and #18). If I do this when the car has been warmed up the light will stay off until the next cold morning.4) If I reset it by removing fuses, 4x4, including low range, works fine. If the light is on, no 4x4 action is possible.
5) I have read about others having issues with the transfer case shift motor. I played around with this a bit with no effect. I removed it, checked alignment, slightly moved the encoder ring in each direction, etc. I did this on a cold morning when the light will stay on, and none of my adjustments changed anything.6) Build date is May 2002.
7) Two or three times over the life of the vehicle until now, the light has come on for one start cycle and then reset the next time I've started the car. The issue never stayed around, and didn't seem temperature sensative.Pretty much, I'm shooting in the dark here. Before I take it to the dealer, any ideas on what components in the system would be temperature sensative? Anything I can do without reading 4x4 trouble codes? Any info would be helpful.
Thanks, Larry