Ashton89iroc

Hey guys, while trying to find out why on earth my rear defrost won't work (i have good ground, but no test light, so i tried tracing the wires) i came across some wires that have been cut by a previous owner, and something else that just isn't plugged in and i have no clue what these two things are..i really want to find out if this is whats causing my rear defrost to not work....youll have to excuse my crappy resolution.

Project86B4Z

Looks like could be tcc lockup canceling switch connector

Ashton89iroc

what is the tcc canceling switch connector....and which picture are you talking about?

Project86B4Z

The one connector with a solid pink and a tan or black wire

Ashton89iroc

i found where the one with the 4 cut wires go. there are matching color wires coming out of the driver's side kick panel....any clue what those are for?

vetteoz

iTrader: (13)

Plugs into a switch at the top of the brake pedal ; unlocks the torque convertor when you hit the brakes

Ashton89iroc

what is the purpose of locking/unlocking the torque converter?

Ashton89iroc

nevermind on that last comment...google is an amazing thing.

that white plug i do not believe is the TCC plug, everything is already plugged in into my brake light switch. the wires coming out of that white one are pink with a black stripe and then purple. any ideas?

what about the other one?

vetteoz

iTrader: (13)

You think?

Ashton89iroc

there isn't anywhere else to plug anything in on my brake light switch....i don't understand how it could be it. man, i hate wiring problems...they're so confusing sometimes. lol

Ashton89iroc

on that unknown plug...looks like somebody connected the two ports on it by jamming a "U" shaped piece of wire in there so it connects the circuit or something....would that accomplish anything?

lt1zr28

i have a 89 Z i can look for you when i get back to my car

vetteoz

iTrader: (13)

Your car has been butchered ; there are wires cut and plugs disconnected.
How do you know you have the correct type or number of switches on the pedal?
PO could have done anything the bubba way

vetteoz

iTrader: (13)

It would bypass whatever it was connected to ( the cut end )

What colors are the wires?

Ashton89iroc

lt1zr28, i appreciate it man!

ok, the color of the wires i do believe are green, grey with green stripe, black and brown-ish tan.

the wires plugged into my brake light switch are orange blue and yellow in one plug and grey and what looks like brown in the other plug.

the reason i believe everything is plugged into the brake light switch is because i looked all over it, there aren't any open ports..plus, the original one was broken so i bought a replacement, it was the exact same thing and the same plugins that came off the original clicked right into place on the replacement.

I wouldn't call my car butchered either, this seems to be the only thing I've found that was either cut, or something wasn't plugged in right (other then the stereo system, PO obviously didn't know crap about sound systems)

Ashton89iroc

I found out there are different style brake switches. both have the same style top plug, but the back plug styles are different. one has two prongs and that style fits the mysterious plug i have, the other style is is the one i have on my car...and i also have the plug for that one.

I'm thinking when they made these cars, they wired both plug styles so you can use either one.

vetteoz

iTrader: (13)

A manual car doesn't use the TCC switch

Ashton89iroc

im not talking manual vs. auto. Its cruise control vs. non-cruise control.

I found they have different switches for that. so maybe GM put both plugs in for the sake of ease of installation, and that way there wasn't a special wiring harness for the cars ordered with cruise control delete.

abray1

Could it be the connector for the bose kick panel speaker box? I think I remember the plug being in a recessed place in the box.

vetteoz

iTrader: (13)

Probably
but in any case the plug you have disconnected , as shown by the wire colors in the circuit diagram , is for the TCC

Ashton89iroc

TCC switch= mystery solved! thanks guys!

so you think the other one went to the bose speaker system? huh, i had no clue the kick panels were speakers...

abray1

I have an iroc that came with the bose system and the kick panels were boxes with the speaker and amp all made in the kick panel. They had a square plug that fit in a square slot in the back of the kick panel and I think it looked just like the plug in your picture. The bose system had speakers in both kick panels and the rear deck cover that was also lockable. I put infinity speakers in mine and a kenwood deck. I also put speakers in the dash (plates) and also 6x9s in the sail panel and it turned out to be an awesome system. The bose system didn't work very well and the little amps weren't very reliable but it was a good idea and I like the lockable storage lid in the back. The 91-92 rear deck lids had bigger 6.5 inch speakers. If you can find your rpo codes I think it was U code but I can't remember it. Try not to cut it since a lot of guys try to add the bose option.

Ashton89iroc

yea, i went digging around in the car today. I have the rear deck lid, so i knew i had the Bose system in the car. but i didn't know all what that entailed, i took apart the kick panel and all the circuitry looks good, no burns or anything...so i believe it may still work. I've also heard they're unreliable, so i think i'll gut it and put some modern speakers in it. I've seen a picture of the underneath side of the rear deck lid, and mine doesn't look like it at all...i believe someone gutted the wires out of it for some odd reason. doesn't matter since ill go ahead and upgrade it now that I've figured out what it is. I really appreciate the help guys!