1987 Corvette Z51 4 + 3 overdrive help???

[vettebob]

Man, I hope somebody can help me with this.... I have been web/forum searching for hours and can't find it. Trying to get this '87 Vette ready for a trip asap. My books don't have the correct wiring diagram and I can't find it on the net.

I want to convert my 4 + 3 to a manually switched operation. (By pass the computer.)

I have seen it said many times to just cut the tan/black wire at the relay and run it to a switched ground. But here's my problem. My relay has TWO separate tan/black wires going into the relay.

Here's the wires on the relay connector:

Brown (verified goes to ALDL)
Pink w/black stripe (Assumed to be power, and has 12v with key on.)
Two Bluish Green wires together on same terminal. (Go to O.D.)
TWO separate tan/w black stripe wires. ??? (These both have 12v with key on.)

So how do I bypass the computer with this setup?? I don't dare take a chance on frying the computer.... budget is shot from other fix ups and repairs!

Thanks!
vetterobert

[ChuckG]

Manually switched? Your OD switch break or something? My turns on and off just fine with the rocker on my console.

[vettebob]

Yes, I want to have it manually switched. I don't like the operation in 2nd and 3rd gears, and want to just switch it on when I am on the highway and in fourth gear. Mine has the momentary button on the shifter. I want to bypass the computer and have a manual on/off switch.
Thanks,
vettebob

[ChuckG]

That's weird. My shuts off with the rocker and stays off until I turn it back on.

101 Projects for your Corvette says unplug the second gear switch and sort the plug on the transmission, but I did and all it did was completely eliminate the OD. Maybe their advice was for the later 4+3s with the switch on the stalk?