Firstly thank you Buick64203 and LARRY70GS for the suggestion in my earlyier thread about my fuse block for suggesting that I get a copy of the Buick Service Manual. An INCREDIBLY valuable resource. Thanks to it I believe I have identified what these wire/connectors are but I wanted some confirmation with any who have seen uncut/unmolested versions of these. Firstly I believe the below pic is where the temperature control unit is (face plate removed to be restored) and my car had a dummy in the right gauge window and the 2 gray wires were about in that spot. So despite the bare nature of the second wire I think both of them are supposed to be the dash lights for a tach or clock in that spot (bonus points if you can confirm the one remaining gray socket is the correct socket and can tell me where to get a replacement for the missing one :Brow. The second connector on the right with the yellow wite looks from a wiring diagram to be the radio power wire and the bit of cut wire inside (can tell color as they as they were cut too far down inside) was supposed to go to the front speaker ( I found the wires for it cut and laying off inside the dash as well). Was I right/wrong on these ? Second pic below is the radio plate area removed and I think the pulled out connector is supposed to be the Horn Relay/Buzzer connector. The other one I forgot to pull it out but you can see it laying back in there is a red or orange 1 wire with a large cylindrical connector on the end and I'm thinking that is for a glove box light that may have been only an option? The third pic below I have the gas pedal in the shot to give a frame of reference for location but I have this what looks to be black and white striped? wire with a clip style connector (circled in red). From what I remember about my 79' Regal I had, it is a dash frame grounding wire? Where did this little guy "usually" clip to on the dash frame? Even though I'm sure it can go anywhere I am trying to get everything back to factory so I can be rock solid in the wiring (definitly not an electric kinda guy lol) so when stuff still doesn't work I can looks at components in the system. One last thing is that none of my dash lights (bulbs confirmed working from switching them around) are working though all other inside and outside lights seem to work (still waiting on replacement tail light harness so that section is not in the system and I haven't located the right and left floor courtesy lamps which I assume were standard) and when I take the printed circuit board off the back of the speedo and I turn the lights on and key on the left blinker light glows faintly and blinks slightly slower but with lights off the glow is not there and it blinks at it's normal rate. Do these symptoms happen to sound familiar to anyone? I am suspecting the light switch but I do have a lot of gremlins I am keeping track of at the moment lol.
First pic, gray wire with bulb socket is light for either tach or clock. Last issue, bulbs not working sounds like a bad ground?
Scott is correct. First pic shows the two gray wires for either the clock or tach. The connector with the yellow wire is the radio power. The two wires that are cut short in that same connector with the yellow wire are for the front speaker. One is green, the other is green with a black tracer. You are correct on the horn relay connector. And orange wire is the glove box light. Last pic is a little fuzzy, but if its got a ring terminal, its a ground. As far as the instrument lights, the power comes out from the gray wire on the headlight switch. So check the gray wire coming out of the switch for power. There are some grounds that need to be attached to the printed circuit board for the lights to work
I just took a complete under dash harness and cluster out, so all the wires and where they go are fresh in my head. Ask away!!
That wire in this picture, http://www.v8buick.com/attachment.php?attachmentid=335053&d=1463728845, is the THM400 transmission kick down. That and a yellow wire go to the gas pedal switch of a THM400 equipped car. Your car is a THM350 eqipped car. I can see the downshift cable end attached to the gas pedal in the picture.
My esteemed colleague is correct:laugh: I just checked the skeeee-matic and there is black with a white tracer going to the kickdown switch.
Hmm I wonder if your right 87GN_70GS about a bad ground as I was going back and looking over the diagrams in the service manual again and its page 120-30 diagram 120-18 and i see the back of the clock connector showing 2 branches coming off the black, one being the black itself and a small indicator of ground to the case. Then the two lights for the clock have ground to the case indicators as well. I dont see how the case could be getting a ground honestly because thier is no metal tab connecting the mounting posts like the fuel gauge and speedo. With no tabs to attach a ground on the clock case and I see no ground wire like the wiper and light switch anywhere near the location I think I'm stuck on that one. Someone with a working clock setup will have to chime in for sure again being no electrician I don't know if you can have to many grounds or not enough to just run my own. LARRY70GS man i cant believe I didn't notice the actuating cable coming through the firewall right there at the pedal. But then again I wasn't looking for it so good thing it wasn't a snake! So is a TH350 car supposed to have the downshift switch as well? because I am noticing there is no bracket if so to mount it and no other wire near there especially not a yellow one. I would definitly like to get one back on the car if it had one because a cable in clearly there. BUICK64203 since you seen a uninstalled harness maybe you noticed a wire with this clip and also LARRY70GS maybe you are for certain now that you see this but the pic is as close and as not blurry a pic I could get of the black and white striped wire under the dash that may?may not be a transmission kickdown wire. Does this clip end look familiar at all? Thanks all very much for the help so far everyone
The wiring will be there for a THM400 equipped car regardless of what transmission the car is ordered with. Looking at what you have, I'm not surprised you could be missing wires.
been tracing and figuring out more of what I have. It definitely is a pretty butchered harness so I think I'll get what I can working and leave well enough alone until I can get a replacement dash harness and engine harness as I have noticed that one muddled up too. Thanks to all who helped sure is helpful to have someone to bounce ideas off of and get suggestions or confirmation. :TU:
