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My wiring at the solenoid and regulator has seen better days. With the help of Midlife and Motorcity I am making some progress. My car is a 72 with rear defrost/center gauges/convenience group/tach. The harness area in question is pictured below.

 

1871684913_72wireharness.jpg.6a71ed1e63598d026607eb0f34bab898.jpg

 

My questions if someone could assist are:

 

The wire identified as rear defrost runs across the top of the shock tower support and also plugs in the hood light. This is connected to a 20Amp circuit breaker that looks to be in rough shape. NPD advertises a 20Amp breaker for the convertable. Does anyone have a rear defrost car with this breaker?

 

The black and orange wire marked as unknown, does anyone know its use?

 

NPD and CJs circuit breakers would these work?

 

http://www.npdlink.com/store/products/circuit_breaker_20_amp_c4dz_14526_b-102057-1.html

 

http://www.cjponyparts.com/convertible-top-switch-and-circuit-breaker-1965/p/WT1/

BKDunha

72 Mach 1 H-Code (Concourse driven restoration)

67 S-Code Factory GT with 4-Spd

68 Mercury Cyclone (Pro-Street project)

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My wiring at the solenoid and regulator has seen better days. With the help of Midlife and Motorcity I am making some progress. My car is a 72 with rear defrost/center gauges/convenience group/tach. The harness area in question is pictured below.

 

 

 

My questions if someone could assist are:

 

The wire identified as rear defrost runs across the top of the shock tower support and also plugs in the hood light. This is connected to a 20Amp circuit breaker that looks to be in rough shape. NPD advertises a 20Amp breaker for the convertable. Does anyone have a rear defrost car with this breaker?

 

My 71 Had the same type of stuff on the fenders. It's still in boxes right now. -kcmash

 

The black and orange wire marked as unknown, does anyone know its use?

 

I would have to chase it to see what it goes to.- kcmash

 

NPD and CJs circuit breakers would these work?

 

http://www.npdlink.com/store/products/circuit_breaker_20_amp_c4dz_14526_b-102057-1.html

 

http://www.cjponyparts.com/convertible-top-switch-and-circuit-breaker-1965/p/WT1/

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eddyW the one I have marked as alternator in the photo is part of the alternator harness and I have the replacement for that. The other wire marked as UNKNOWN goes back into the main harness and attaches to the same junction block as the alternator lead. Thanx, but I think it is not part of the alternator harness.

BKDunha

72 Mach 1 H-Code (Concourse driven restoration)

67 S-Code Factory GT with 4-Spd

68 Mercury Cyclone (Pro-Street project)

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Brian,

 

I just looked at my car and it also has the wire marked unknown. My car has rear defrost and power windows. I have no idea how to trace it for you but willing to help if I can.

 

Jeff

Jeff

1972 Q Code Convertible

 

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Don't know if this will help but there is an orange and black wire in the under dash harness for the rear defroster. It is the main wire that runs to the heating coils on the back glass. The harness that I have has P/N D1ZB-18C394 on that wire. I also have the rear defrost and that wire to the breaker. The gage and color appear to be the same as the wire that runs from the harness back to the rear window.

 

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50 F1

73 Mach 1

86 F150

96 F150

2014 F150

Always looking

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The breaker also services the Rear Seat Back Release Solenoids in Non-Convertibles. This is due to the high current draw of the solenoids. My car doesn't have the "Unknown" wire, and I lack the rear defrost option, so it seems likely as others have suggested that is what that wire is for.

2013 Ford Focus SE Flex Fuel 5spd - Daily Driver

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