O/D button won't light or truck won't kick down
 

Hey there, new to owning a Dodge and recently bought a 96 ram 1500 5.9mag auto 4x4. I was recently driving on the highway and when I hit the O/D button on the dash it didn't light up and the truck never downshifted. Where do I begin to diagnose the issue? While driving it shifts into all 4 gears.

The O/D off button just sends a signal to the PCM. The PCM takes it from there. So, need to see if you get power to the switch, and if pressing the button actually gets the signal back to the PCM. Grab the service manual for your truck from here, check out the wiring diagram, and see what ya got.

Was wondering where you went. Thought I'd have full drive up the to check on you :D

I have been one sick puppy for the last week and change.... and it ain't done with me yet. You can probably expect me to drift in and out for the next several days. Today is the first day this week I can almost think straight. :)

I hope you get better! Rest and drink plenty of Gatorade!

I hate gatorade. That stuff is nasty. :D

I have a god supply of orange juice though.

What!?! I love it or Powerade.
You need electrolytes, they hydrate you.

Only if I can keep them down. :D