99 F250 V10 4x4. Hopped in the truck this am, fired it up and the OD off light is on. I thought that's weird as I dont recall hitting the button. Hit the button and nothing, the light stays on. Put it in park, shut it down and fire it back up and its normal. But I see that depending on how I wiggle the shift lever I can make the OD off light come on. I assume I have a short in the wiring thru the shift lever tube??? Any help would be great.

 

The little wire harness has chafed through and is intermittently shorting one of the wires to ground.

Remove the column shrouds to inspect and repair.