I have a first gen 03 Tacoma DLX Crew Cab, 3.5, auto, and recently replaced dash lights. The battery was disconnected first and the process began, all went smoothly until I put it back together, the lights and gauges all function however, when put into 4WD, the light doesn't work, and it doesn't shift into 4WD. I checked the fuses and all are good unless there's a hidden one somewhere I'm missing. Any suggestions appreciated, the 4WD worked fine before the bulb change.
4WD Problems
- Thread starter Riley051
- Start date
JayQQ97
MW surVivor ... clutched. 348k on the 0D0
i had this issue a couple years ago in my '97... 4wd light went out in the summer and i had no way to really test if it was just the light and the front wheels were turning until a big snowstorm in the winter when i found out those front wheels were not engaging 
and it left me stranded a couple miles out and had to hoof it back in the cold and sleet.
turned out it was a faulty actuator switch underneath buried way up near the top of the transmission/transfer area
perhaps your '03 rig has the similar simple switch plug and not something purely electronic, i can't say for sure, many changes happened between '97 and '03
and it left me stranded a couple miles out and had to hoof it back in the cold and sleet.turned out it was a faulty actuator switch underneath buried way up near the top of the transmission/transfer area
perhaps your '03 rig has the similar simple switch plug and not something purely electronic, i can't say for sure, many changes happened between '97 and '03