4wd hi light flashing, but will not engage.
2005 Toyota Tundra 4x4 ex cab. When I push the 4wd hi button, light flashing
without engaging. Tryed slow, stopped, forward, reverse. No luck.
Most common is the transfercase servo motor, over time the brushes wear and the motor will no longer turn, you can try lightly tapping on the motor as someone pushes the button and see if it runs, otherwise you will have to do the involved circuit test to and from the controller to make sure it is getting the proper signals in and voltages out. HTH
Search Toyota Tundra Questions
Toyota Tundra Experts