1976 Superior 54XL Restoration Log

Jean-Marc Dugas

PCS Member
The headliner was removed and is ready to go to the upholstery shop. We were not able to source the exact material but will be ordering the closest we can source.

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With the headliner removed, I will now have the opportunity to trace a few more wires and hopefully better troubleshoot a couple of electrical issues. I may also take this opportunity to apply some isolation / sound deadening material tothe roof.
 

Daniel Scully

PCS Member
Super Site Supporter
I used Dynamet and Dnya liner in the roof of the wagon and anywhere else I could, when I replaced the headliner and door panels huge difference in sound and heat transfer. 20220202_173253.jpg
 

Paul Steinberg

Administrator
Staff member
Super Site Supporter
Can you post a magnified picture of the material that you need? I was able to source the correct material from one of the restoration companies when I had the headliner done for my 1969 Cadillac. Most materials are still available if you know where to look for them.
 

Jean-Marc Dugas

PCS Member
Can you post a magnified picture of the material that you need? I was able to source the correct material from one of the restoration companies when I had the headliner done for my 1969 Cadillac. Most materials are still available if you know where to look for them.
The material was ordered this morning. There is no turning back now.
 

Jean-Marc Dugas

PCS Member
Today was an electrical type of a day. I figured with the headliner removed I would have greater access to the wiring.

My goals were simple, troubleshoot the issue with the door ajar circuit and figure out what was the purpose, if any, of two mystery wires located in the patient compartment.

I would definitely not have been able to trace all the wires if the headliner was still in place. For the door ajar circuit, all the wires from both rear side doors and the back door are spliced together near the D post of the car.

From there one of the wire goes to the fuse box where it is energized when the key is turned on and the other wire goes to a flasher relay located on the firewall in the engine compartment. Lastly, another wire comes out of the flasher relay back through the firewall and connects to the door ajar light located on the lower dash pad to the left of the steering wheel column.

This circuit has not been working ever since I got the car. It took me a while to figure it out but the issue ended up to be that the wires connecting to the flasher relay where connected backwards. I switched them around did the test and voila problem solved.

Next, for some reason the rear air conditioner blower wires caught my attention. It took me a while to trace all the wires from the source to the switch but I ended up finding out that one of the mystery wires was connected to this circuit. I do not understand why it is wired the way it is see the video attached.


I was able to trace the second mystery wire from the patient compartment as well as another mystery wires located within the Rat's Nest of wires behind the main overhead console. They both lead under the dash somewhere. At this time I'm not sure if these are just extra wires or if something that should be connected is not. We'll figure it out some other day.
 

Tim Prieur

PCS Member
J-M, that is one bad bowl of spaghetti that Superior laid out. Well done for tracing it all back. You will be able to write the book on these cars when you are done.
 

John ED Renstrom

PCS Member
Super Site Supporter
The only sure way to track down superiors wiring is to start at one end and haing on all the way to the other. Every one i got into was wired with the same white wire threw out.
 

Jean-Marc Dugas

PCS Member
It is still very messy, but except for one wire, all wires are now accounted for and identified. I can't help but scratch my head with the configuration of some circuits. In some cases, I am not sure if the wiring is original or if it has been modified, but I think that there will be some improvements before the headliner goes back in in the spring.

 

Jean-Marc Dugas

PCS Member
The excess to me is the part i don't understand. In places it in the yard stick range. Lot of money there wasted.
I agree. A good example is that in my car, there is a common ground wire in the wire loom for the front, rear, and side red flashing lights for a total of maybe 30 feet. This ground wire is connected to one light and all of the other lights are grounded directly to the body. This is OEM as there are no splices in this common ground wire except for that one light.
 
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