'93 240 automatic - where is the relay/switch for the fifth gear?

The wire goes up through a rubber plug into the passenger compartment and up into the center console to where the relay is. You can get heat shrink butt splices to make waterproof joints, or you can solder the wire together and cover it with a piece of heatshrink tubing. In a pinch, a normal butt splice with a good coat of electrical tape will work.

Forgive my ignorance, but where can one usually find "heatshrink tubing"? Thanks.

Btw, I find this whole thing pretty dumb. This overdrive thingy could be removed entirely and the car always able to reach 4th gear. I don't see any use for this thing which has caused me a good deal of aggravation and worries.

It's handy if you're hauling a heavy load or towing a trailer, it prevents the transmission from hunting, which newer computer controlled automatics usually don't do.

You can get a bypass plate from IPD, or just wire the solenoid to switched

12V. Heatshrink tubing can be found at an electronics store, Radio Shack carries it. Heatshrink butt splices are sold at any autoparts store in the electrical section.

Update: I soldered the two wires and use heatshrink tubing. Btw, the insulation around the wire is crumbling into dust.

In retrospect, I believe the wire broke in two as a result of driving in 10-12 inches of snow for 10+ miles. I must have hit something hard, like ice and it broke the wire.

Everything is fine now. I must not be normal for worrying so much about my 240...

Thanks to all for your help. You've got a nice group in here.

The heat and oil do nasty things to that wire over time. Last time I worked on an auto 240 I replaced the whole wire from about an inch from the solenoid to where it goes up into the car. New wire got two layers of heatshrink tubing over the whole thing.