Topic: 1968 San Jose GT 390 Fastback Wiring Harness Restoration

[bullitt68]

Probably convienence control panel?

No I don't think so,  the convenience group harness has the 4 bulbs on it. Not sure if it is the Tilt-A-Way harness. I will check my tear down photos as well

[midlife]

I see what's part of the parking brake plug (I think...it could also be an AC plug), but the rest of the harness looks like nothing I've seen before.  It could just be how the photo was taken which doesn't show much of the plugs.

[bullitt68]

I see what's part of the parking brake plug (I think...it could also be an AC plug), but the rest of the harness looks like nothing I've seen before.  It could just be how the photo was taken which doesn't show much of the plugs.

I don't have AC on my car. Its not a great photo is it. The plugs are facing down and the relay or whatever it is is not shown. I will take a better photo

[Coralsnake]

I see the tilt harness. It is photo # 7

[Coralsnake]

Im thinking thats convienence control and the purple green wires are seat belt warning.

[bullitt68]

I see the tilt harness. It is photo # 7

Ok good to know. My tilt-a-way vacuum system was not functional. Someone replaced it with and electric solenoid set up at some point.

[Coralsnake]

They have bypassed the neutral safety switch of the tilt electrical wiring too...

[67gtasanjose]

I dont recognize the fifth photo, do you recall what that underdash harness plugged into? Its the one with the relay in the center of the photo?

5th picture is of the Convenience Group  harness.

[67gtasanjose]

They have bypassed the neutral safety switch of the tilt electrical wiring too...

I saw that too.

Those two wires should reach over to the connection to the starter interruption switch of the Tilt-away feature. I am not well versed in the 68 version of that circuit, I only know it prevents the starter from working by interrupting the solenoid wire while the wheel is tilted away.

[Coralsnake]

The safety switch is common to all tilt cars. “Neutral” safety may have been misleading. The switch is inside the vacuum motor and does not allow the car to start when the wheel is in an offset position.

[67gtasanjose]

The safety switch is common to all tilt cars. “Neutral” safety may have been misleading. The switch is inside the vacuum motor and does not allow the car to start when the wheel is in an offset position.

Ahhhhhh, yes...duh! I knew that! That one of the two Tilt-away harnesses is plugged into the main underdash harness "interupting" the starter solenoid wire at one of the under dash connectors (of the under hood harness ~located left of steering column). The ACTUAL neutral safety/reverse lamp connector is under the hood (above the throttle pedal arm), where the "loop" for a manual transmission car would be found.

I have amended my earlier reply to help others avoid confusion.

[preaction]

In picture #2 of the OP which is the engine compartment harness the two horn leads are finished differently, the passenger side lead has a plastic "tube"  running the length of the wire and the drivers side has been taped as is the rest of the harness Im in the process of going over my harness which has been finished in the same way is there a known reason for this ?

[J_Speegle]

In picture #2 of the OP which is the engine compartment harness the two horn leads are finished differently, the passenger side lead has a plastic "tube"  running the length of the wire and the drivers side has been taped as is the rest of the harness Im in the process of going over my harness which has been finished in the same way is there a known reason for this ?

Done on a number of the model years. Have no idea of why Ford and their employees designed it that way but since it cost money there must have been a reason.