There are several connectors under the drivers side of my dash that have been disconnected and just left laying out. It really bothers me and I am trying to figure out what they went to.

The only thing I could possibly think of is they went to something having to do with the A/C since it was removed, but I doubt this since all the PO did to remove the A/C was rip out the condensor, AC lines, and accumulator. I removed the compressor and installed a different sized belt after I got the car since all it was doing was putting dead weight on the car.

The other thing that crosses my mind is maybe they go to something having to do with the cruise? The cruise on my car does not currently work and I am trying to figure out why.



The first picture is a two prong black connecotr hanging out behind the fuse block. The second is a two prong clear connector sitting at the base of the column, and the third is a smaller clear single blade connector with tape hanging off it, very close to the larger clear connector.

Also, there is a black hose amidst all the wiring right above the brake pedal that is open ended and makes a whooshing sound when you depress the brake. It is just a little larger than a ziti. Anyone have any idea what this goes to?

 

i have a few like that as well.

my car doesn't have:
cruise
rear defrost
rear hatch button

maybe it's one of those?

 

Those fuzzy camera phones dont help. I also have a plug that looks like the one in the middle and the one on the far right. Chances are, those are for difference options that could be ordered with the car. So I wouldent worry about it much.

 

It looks like it's number 4 in my attached picture. I have no idea what it is and it's not connected on my car either.

Any ideas about numbers 1,2, and 3 in my picture? It looks like 1 and 2 can be connected, but should they be?

 

I agree with the guys, those blurry/grainy cellphone pictures won't tell us much.
But YOU can!

What wire colors do the connectors have. Pay attention to possible black/white stripes too.

I'm not sure if the orange and white wires in the first picture go to that connector in question but if so, it's the dome light connector for the light above the pedals. Some cars didn't come with it (be it from the factory or previous owner) but the connector is usually there.

Get us the wire colors and we can do more with those.

Lou

 

i've attached another picture showing wire colors.

any ideas?

 

Sure thing Lou. I always wondered whether or not there should have been a light by pedals. I also have no under hood light.


BTW, I'm gonna need your help with the STS wiring.

 

Malaka,

your connector #4 (pink/black and purple) is for the TCC, which you don't have on a 5-sp vehicle so don't worry about it (normally, it would connect to a switch on the brake pedal).

Connector #3 is just to supply power to some circuit. If everything in the vehicle works, it's probably just a spare for a feature that you don't have.

Connectors #1 and #2 sure look like they belong together. However, I could not find this single purple/white wire in any diagram. I really have no idea what it's for. Does your chime module beep if you turn the key on but leave the seatbelt off?

Lou

 

That black hose above the brake pedal is for the cruise. It connects to the brake pedal near the pivot point/brake light switch at the top and runs to the cruise control servo. That is what enables the brake pedal to turn off the cruise control when you press the brake. The other connectors do not connect to the cruise control that I am aware of. The connector for the cruise servo is a 6 pin connector on my 92.

 

Lou, here are some much better pictures I just snapped. I believe you were correct that the connector in the first picture went to the under dash light.

I was banging my head trying to figure out where the heck they would put an under dash light and then it dawned on me what the hole is in picture 2 I could never figure out. There is one on the passengers side panel as well and I can't remember off the top of my head, bu would be willing to bet theres also a connector up there also. I can find the lenses going for sale on ebay, but I cannot find the bulb assemblies or wiring harness for them. Any ideas where to look?

Picture 3 I believe is for the TCC/cruise switch which we have determined to be missing. Please confirm this as I am in the process of hunting down a new switch.

 

Picture 4, is still a 100% mystery connector. It is a single wire blade connection with a tanish colored wire. Any ideas?

 

Yes, the pink/black and purple wires on that connector indicate that it is for the TCC. It looks like you're missing the whole switch.

For that lightbulb, you can simply use any small bulb with a socket from the small side markers, for example. Should be available at any car parts store for a buck or two. If not, a junkyard will have dozens of them.

I'll take a look at the tan wire tomorrow. Where does the wire come from? The steering column? Underdash harness? Other? It might help me.

Lou

 

Lou,

I get the chime in either case, connected or not (I connected them for the hell of it). I wonder if this is the same one that Fire is trying to identify.

 

I am glad Malaka mentioned his chime module, because I just remembered that ever since I bought the car, the chime for the sealtbelts has never worked. I also see a fasten belts light on my cluster and never has it once lit up. What could be unhooked here?

So Lou, you are saying that the Connector in the first picture IS for the underdash light?

 

My seatbelts light/chime also doesnt work

i have an 85Z, i will look for connctors unplugged.

 

Yup, the orange and white wires in that connector are for the lightbulb that goes into the dust cover above the pedals.

Lou

 

Socks, my car is also an 85 Z28. If you find anything, let me know. It bothers me when something amiss! It makes me want to find it and fix it!

 

Lou, did you find anything yet on our mystery connector?

I dropped the dash panel and did a VOM check on it with the black lead grounded to the chassis, and nothing. I tried with the engine off, then the key in the on position, then with the engine running. I was convinced it might have had something to do with my absentee sealtbelt chime and light, but got nothing.

I attempted to follow it but it seems to go into that huge bundle of wires wrapped into electrical tape that snakes up toward the cluster. I can't be sure, but I think it exits out and plugs into the right side of the cluster. I saw a wire that looked the same color doing this but cannot guarantee it goes to our dead connector since I cannot follow it short of slicing open the bundle of wires. Maybe this is our sealtbelt light? Or another thing it could be is the choke light? I noticed my cluster has a choke light but I have not seen it come on once in the entire time I've owned the car.

Also, today I tested the two wire connector by the fuse block and you are indeed correct that it goes to the underdash lights as it came off and on when I pressed and released the door button. However, when I dropped the panel on the passengers side I could NOT find this connector. There was no evidence that one ever existed. No stray or snipped wires. Does it sounds like something was taken out or was the passengers side underdash light piggy backed off that one connector? And if not, would you see any porblem in rigging it up this way?

 

today i broke my thumb, and im in a cast. so i wont be lookin for wires any time soon.

my 85 came with underdash panels that had the lights in them, their on both sides. and the domelight is also on teh same circuit. search for teh wires, they should be there.

the choke light on my car works, since its carbureted. i dont think your choke light would work since its tpi.

sorry i cant check out my car right now

 

When I bought my car it was actually missing BOTH underdash panels.

I bought a set off ebay that I (think) came off an 82. Each panel has a socket for an underdash light. The drivers side of my underdash has the connector for an underdash light, but the passengers side does not.

By the way, sorry about your thumb. That sucks!

 

i remember reading a topic on TGO here a while ago, ill try and do a search, but it seemed that some people had the underdash (hush) panels, and some didnt.

last time i read teh topic i dont think anyone was sure of why or which cars got them.

 

Sorry for not getting back to you earlier.

I didn't find much but I still think it has to do with the audible warnings system (door chime). Either for the seat belt or for the doors.

If you don't have your door chime module anymore, then I wouldn't worry about it.

Lou

 

Could you describe to me exactly when the door chime comes on and what it sounds like?

The only chime I have EVER heard from my car is when I turn of the ignition and the headlights are still on. And It's more of a constant beep than a chime.

I was looking through the wiring diagram in my Haynes manual last night and trying to make sense of it. I did find a tan wire going to the convenience center and I'll check again when I get home.

Also, do you find it odd about how there is a connector for the underdash light on the drivers side but not the passengers side? Couldn't I just piggy back the passengers side light off the drivers side connector?

This just really bothers me that something is broken it makes me want to find the problem and fix it.

 

[QUOTE=FireDemonSiC;4015966]Could you describe to me exactly when the door chime comes on and what it sounds like?

The only chime I have EVER heard from my car is when I turn of the ignition and the headlights are still on. And It's more of a constant beep than a chime.[/quore]

Yup, that's the "chime", just a constant beep.

Test these two scenarios as well:
- when you open the door with the key in the ignition.
- when you turn the ignition on but the driver seatbelt is fully retracted.


Yup, it's odd. But we're talking about cars that are over 2 decades old. Count the previous owners and imagine what they've done to the car.

Yes, you could run an extra pair of orange and white wires from the driver side light to the passenger side.

However, check behind the passenger kick panel for the door jamb switch. Does it have a white wire attached to it? Where does it go?


Yeah, welcome to the club. If I wanted to fix everything that's wrong with my car, I'd have to quit my day job. Heck, I'd probably just redesign it. The sloppy steering, the illogical suspension, the electrical system .... I could keep going.

Too many things to fix. Some of them broken.

As I said before: Count the previous owners and imagine what they've done to the car.
And also don't forget where the car came from originally, it's a Cheby!

Lou

 

Yes. Previous owner is the reasons I'm missing my TCC/Cruise switch entirely...

I'm going to go out on lunch break and tinker with that wire. I know for a fact that nothing chimes in relation to my door or seatbelt. Do you think it could possibly wake anything up if I grounded that wire to the chassis? I figure worse case scenario, I blow a fuse...

 

Most of the signals for the audible warnings module are ground signals so that would be a good test.
As you said, worse case scenario (if the wire is not what we think it is), a fuse pops. That way, you'll at least know which circuit to look at!

Let me know what you find out.

Lou

 

OK. In one hour I'll go perform the test and report back with the results!

 

Lou, just came back from messing around with the connector.

I tried grounding it with both the engine off and then on and got nothing. Then I got froggy and decided to give it some juice, still nothing. No chimes, no lights, no blown fuses and no smoke.

BTW my door chime DOES work. It's just the seatbelt light and chime that doesn't.

I'm beginning to think this connector might go to the shift light. Heres why:

When I first bought my car, I noticed it had a 145 speedo. Since there was no 145 in '85 I figured it had to be a swapped cluster or speedo in the least. When I opened the trunk, I found an extra cluster bezel that was for a MANUAL car and had the shift indicator in it. Is there any way to confirm this theory?

 

Ok, I give up.
The black wire could possibly be the seatbelt wire but who knows. Same with the tan wire, it should be for the door ajar alarm but that works fine anyway.

I don't know the '85 wiring as well as the '90's models and although they should be nearly identical, there's always something that GM changed every year.

If you can live with a disconnected wire and with not knowing what it's for, I say leave it disconnected.

As for the shift light, I don't think that's the wire.

Sorry I couldn't help more.
Lou

 

Black wire?

And It's cool. The only thing in my car that doesn't work other than the underdash lights (But we figured that out) is the seatbelt chime and light, and it has me completely stumped. Apparently this tan wire does not go to that feature, so it must be either a dead end or a feature not incorporated on my car. I'll just tell myself it went to a power mirror or foglights, since my car has neither. It would be nice if we could get someone on the board with another 85Z28 to drop their hush panel and look. Maybe if we could see what plugs into it we would have a good idea.

BTW, When the weather warms up and fabricate my custom tails, I'll be contacting you on help for the STS wiring

 

when my other hand gets strong enough ill be sure to take that panel off and check for wires.

sorry i cant be of much help

 

Let me know what you find!