Was at a stop light and hit my O/D button 3 times and the ABS and emergency brake lights lit up on my dash. Figured out that the fuse blew, fuse #20. Changed it out and the lights went away but now when I hit the O/D button it doesn't turn overdrive off. I checked the manual and there are no other fuses other than fuse #20 for overdrive. Anyone have any ideas, gonna be towing on the fourth and hopefully I can get this resolved. Trucks is a 2004 3.0.

 

A common problem with the OD switch is the wiring harness chaffing or breaking where it exits the shift arm. This can result in intermittent/non-operation and or a short to ground.