1972 TCS (Trans Control Spark) 454 Wire Harness Question

[Monte M.]

I am putting my 1972, with a 454 and a 4-speed back together. I have a few questions on the TCS wire harness.
I have gone through the past threads, but came up empty handed.

Does anyone have a picture of the harness for a 72 big block car.

Thanks Guys,

If you cannot post pictures to this site, you can send me a picture at mbusiness@comcast.net

[Monte M.]

Re: 1972 TCS (Trans Control Spark) 454 Wire Harness Question

Maybe a better question is:
Is there actually an additional harness or is it just the one plug that ties into the main harness?

[Terry M.]

Re: 1972 TCS (Trans Control Spark) 454 Wire Harness Question

I was thinking that there is not a separate harness, but at the same time I was hoping someone with more experience with a 1972 would offer to help.

[Paul O.]

Re: 1972 TCS (Trans Control Spark) 454 Wire Harness Question

The only separate harness section that I remember is the green harness section that goes to the temperature sensor in the right cylinder head. All other connectors are built into the main engine harness if I did not forget something which can happen.

Paul 18046

[Monte M.]

Re: 1972 TCS (Trans Control Spark) 454 Wire Harness Question

Thanks Terry, Paul.
What I did is went back and carefully dug through the harness. I have found the two wires that plug into the TCS switch. It appears they took off the plastic clip, put tape over the actual connectors and tucked the wires back into the harness. They actually did it with tearing anything up. In pictures, the black clip looks like a generic one. I have an old harness. It might have the clip on it.
It looks like all I have to do is slide the wire connectors back into a clip and it will be correct.

This car has been a great lesson to me and a lot of my friends. I have owned it since the 80's. Whoever owned the car before me changed quite a few things, but he took a lot of extra time to make sure that anything he did was done without altering the car. I am actually surprised that the little black connector is not in the parts bin I got when I bought the car. Everything else except the carb was there. Of course it was the carb missing.


Thanks again for the input. This one had me going for a bit.


If anybody has an original TCS switch connector or the original rigid vacuum line that comes off the TCS and heads forward on the clips that are held by the passenger side intake bolts, I am interested. I have an original rigid vacuum line, but I think it is shorter than original. Does anyone have the original overall length?

[William C.]

Re: 1972 TCS (Trans Control Spark) 454 Wire Harness Question

The wire Terminals (Metal parts) go into a connector (Plastic part) if you are looking for the end that connects to the Trans, unfortunately it is a molded-on part if the print I am looking at is the correct one for your application. Easy way to tell is to look at the terminals on your wires, and see if they have a lock tang on the back of the terminal. If the back is flat, then ti was originally a part of a molded on application, and you best source would be a donor harness for use as a repair piece (Pass cars used the same application) This info is taken from a 1971 prnt, but '72 should be the same. If they have a lock tang, send me a PM and I'll look at some other prints for other options.

[Edward J.]

Re: 1972 TCS (Trans Control Spark) 454 Wire Harness Question

Monte, Is the plastic clip in the shape of a T or are the clips side by side on the solenoid? I may have one.my 72 is at home on lift but it is also a small block, not sure if the big block is different.

[Monte M.]

Re: 1972 TCS (Trans Control Spark) 454 Wire Harness Question

Ed,
First, the original connectors are still attached to the wires and they are the kind that have the little tab that locks the clip in once you side it in place. The original black connector was a side by side style. In the few pictures where I can see a clear picture of the clip, it appears to be the very generic side by side clip we see on many thing.
Ed, I do not want you taking one off of your car. In my experience, they are the same clip even though the TCS is not mounted in the same location. If you had a good picture of one, that would go a long way in finding another.

Bill, I appreciate the input, but I am working with the TCS end if the connection versus the trans end. This end is not a molded end. It is the standard lock in end (thank goodness).

Once Again, thank you, for the input.
Monte

[Edward J.]

Re: 1972 TCS (Trans Control Spark) 454 Wire Harness Question

Monte, is the connector on the solenoid? or temp sender? I may have a extra connector depending on which one it is you need.

[Monte M.]

Re: 1972 TCS (Trans Control Spark) 454 Wire Harness Question

Ed,
I need the connector that actually plugs into the TCS solenoid. On the small block car, the solenoid is mounted to the intake bolt about half way back on the passenger side. On my car it is actually mounted behind the carb, just in front of the distributor. The connector looks the same for both cars as the TCS switch itself does.

My temp wires are all in tact and in the correct places with the correct connectors. In fact, I think I have an extra temp wire if someone needs one.

If you do have an extra connector, send me your Pay-Pay address and what you want for the connector to: mbusiness@comcast.net
In fact: if you want to send a picture of the connector to that address, I am sure I will be able to tell if it is the correct one if there is any question in your mind.

Do you need anything specific for your 72. I have lots of misc. parts laying around. I am in a clean out mode around here. If it is not for one of the cars I own right now, or it is not a very important part, I am getting rid of them. Let some other people who need the parts get their hands on them so they can better their cars.

I am in need of a few hard to find parts. I have located someone who has them, but he has no interest in selling the parts. He no longer even has a car. Yet he just likes owning the parts and just likes hanging onto them. It is his right to do that, but it made me realize that maybe it is time for me to sell off some of my NOS stuff that I am just hanging onto because they are so rare.

Joe Lucia was nice enough to look up a lot of the parts and told that some of the parts are pretty hard to find. Even if I cannot get the parts I need for my car (the 63) I can get rid of some of this 72 stuff I have to help someone else out.

Enough rambling. Let me know about the connector. Ed, I like your choice in the year cars you choose to own. You seem like a very smart man if I do say so myself. (lol).

Thanks Again,
Monte

[Edward J.]

Re: 1972 TCS (Trans Control Spark) 454 Wire Harness Question

Monte I will look tonight and send you a PM.

[William C.]

Re: 1972 TCS (Trans Control Spark) 454 Wire Harness Question

Thanks Ed, Sorry I was on the wrong end. For what it is worth, the Part number is 02973407. May still be available via the "Standard Parts Catalog" but used on MANY GM cars of the 60's and early 70's. At least two were used on the Corvette engine, Tiyr applicationas well as the trans kickdown switch for automatice. May also have been used on the Windshield wiper motor also. Picture attached if I can...

[Monte M.]

Re: 1972 TCS (Trans Control Spark) 454 Wire Harness Question

Thank you,

[Bill C.]

Re: 1972 TCS (Trans Control Spark) 454 Wire Harness Question

Monte,

I actaully have the 72 only 454 vacuum tube - goes into the two spring clips and connect the vacuum lines fro the TCS and carburator.
This part is not reproduced anywhere.

Before I sold my car I had someone make an exact copy of my original.
I had a hair-brained idea to try reproducing them but figured it be crazy since it is only for 454 1972 cars...

LOL


let me know if you are interested.

Bill

[Monte M.]

Re: 1972 TCS (Trans Control Spark) 454 Wire Harness Question

Bill,
Good to hear from you. I hope all is going well.
I am very interested in the vacuum line.. I have one now, but it is off another car and is shorter than the original on the 72 with a 454.
Send me a PM with your Pay-Pal and how much you want for the part and we can take it from there.
Thank you.
Monte