Silver

Hopefully, this is an easy fix... my overdrive indicator light stopped working today. The switch is working fine and it switches in and out of overdrive just like it's supposed to. I tried gently pulling the switch button in hopes of finding a bulb burnt out, but the button doesn't seem like it wants to be pulled out. Since I would prefer not to break something I thought it was time to ask the pros for some advice.

wannadiesel

Do you still get a WTS light? The bulb is powered by fuse #2 which may be blown. If the WTS light still works the fuse is good. There should be power on the dark blue/white wire when the key is in "run". Check to see if the PCM is trying to turn the light on. When the light is "on" (OD locked out) there should be ground on the black/orange wire.

The light bulb is not designed to be replaced. The part number for the switch is 5600 4669.

Silver

Just checked... the WTS indicator is working OK... but still no OD light. I will have to check more tomorrow. We drove to the mountains on Friday and the OD light was on when I shut the truck down. The truck sat in a motel parking lot until this afternoon (Sunday). When I started it up and got ready to leave the light was no longer working. Thanks for the reply!

Silver

I finally got some time to check this thing out. I am pretty well satisfied that the problem is simply the light being burnt out. Now for the next question... how do you get that #*%@^& switch out without breaking something?

Silver

Hopefully, one day this may be of benefit to someone...

This is how I replaced the light in my 92 Dodge overdrive switch (same for cargo switch). I used a Radio Shack #272-1141 mini lamp ($1.49). The biggest pain was getting the switch out of the dash. Smaller hands are beneficial here as there isn't much room to work.

Gently open the switch up (you will see the 4 little tabs) to gain access to the lamp. Unsolder the lamp leads and knock off the excess solder. Prep the new lamp by breaking off the plastic around the base. There is also some sort of a plastic-like insulating material around the base that may need to be shaved down (I used an exacto knife). Once you have done this, cut the leads to length and strip the insulation.

Solder it back in and reassemble the switch. You are good to go.

wannadiesel

Stickied.