How do I removed the idlerpulley on my 2006 honda ridgeline

SOURCE: Honda Ridgeline Service Manual

4WD only operates when gear selector is in L and under 18 mph. the rest of the time your 4Wd will activate automatically if the front wheels start to spin,

SOURCE: 2006 honda ridgeline

Pull out the rubber boots, and unhook the limit slider on the right side.

SOURCE: Replace the tail light in a 2006 honda ridgeline

Open the tail gate, and remove the 2 screws on the side.

SOURCE: honda ridgeline key fob program

If it is a factory keyless system than you do need it done by the dealer, but if it is an after market system then reply back with manufacture and model.

SOURCE: HOW TO RESET LIGHT AFTER YOU SERVICE VEHICLE

depending on your vehicle options, turn the key to the off position and then either push the trip reset or the select/reset button and turn the key to the "on" position just before the vehicle "start" position, then wait 10 seconds and the light should go off. if not make sure the outside lights are off and set the parking brake and try again