1972 Dodge Charger SE 440 where does this wire go?

[Kobrak]

Enclosed is a picture of the wire. It seems to be a ground and it is in the harness that contains the wires for the windshield wiper switch. I don’t see anywhere on the switch that looks like a tab broke off, but who knows?!

 

[pnora]

What does your wiring diagram show?

 

[70chall440]

Looks like the wire for the washer.

 

[Nacho-RT74]

Washer function is part of the switch so part of the plug/harness on 72 and lates no matter if 2 or 3 speeds. I think 71s with 2 speeds wipers could still get “manual” (foot pedal) washer? Can’t recall. But still, if electric pump, would be into the wiper plug, not divorced like 2nd gens.

Thick black wire with white trace around there? Damn! At this moment I don’t recall anything like that! Just blower for A/C-Heater, however that wire normally is not with a separated insulation/plug, but inserted into the control switch plug if A/C or into the blower speed switch plug if Heater

 

[Kobrak]

What does your wiring diagram show?

pnora, doesn't show it. It does show the same wire (black/white strip) for the light switch. but I don't see anything for the wiper switch.

 

[Nacho-RT74]

The only 2 black wires with white trace arriving around there are for Heater/AC blower (14 gauge) or Headlights switch (12 gauge)

Heater/AC wire gets power with key in RUN or ACC

Headlights switch wire is constant.

But no one of them are with a separated plug/insulator.

Is some of these plugs melted and maybe installed divorced from the existant switch plug?

A/C control unit should get brown, tan, blue, light green and the mentioned black traced white.

 

[Kobrak]

The only 2 black wires with white trace arriving around there are for Heater/AC blower (14 gauge) or Headlights switch (12 gauge)

Heater/AC wire gets power with key in RUN or ACC

Headlights switch wire is constant.

But no one of them are with a separated plug/insulator.

Is some of these plugs melted and maybe installed divorced from the existant switch plug?

A/C control unit should get brown, tan, blue, light green and the mentioned black traced white.

I was so focused on the wiper switch I didn't even look at the heater control! I'll get a chance to have a look maybe later today. Thanks a ton Nacho-RT74 for the help.

 

[72RoadrunnerGTX]

Enclosed is a picture of the wire. It seems to be a ground and it is in the harness that contains the wires for the windshield wiper switch. I don’t see anywhere on the switch that looks like a tab broke off, but who knows?!

Nacho mentioned it, C1-14BK*, keyed power supply for the blower motor or A/C control. Non-A/C, would plug directly into the blower switch terminal 4. With A/C, would plug into the under dash supplemental A/C wiring harness supplying power to the A/C control switch, blower and compressor.

 

[Kobrak]

I was able to have a look at the heater/AC control unit tonight and I do see a black/white strip connected. So, that black/white remains a mystery!

 

[72RoadrunnerGTX]

I was able to have a look at the heater/AC control unit tonight and I do see a black/white strip connected. So, that black/white remains a mystery!

Looking at your picture again, doesn't look to be black with a white tracer, certainly not a 12 ga wire. Looks more like gray with black trace, 18 ga or smaller. If so, that would likely make it the tach signal wire (T11 20GY*). Where does it go to, if it’s the tach wire it should route to a gromet in the firewall in ’72.

 

[Kobrak]

Looking at your picture again, doesn't look to be black with a white tracer, certainly not a 12 ga wire. Looks more like gray with black trace, 18 ga or smaller. If so, that would likely make it the tach signal wire (T11 20GY*). Where does it go to, if it’s the tach wire it should route to a gromet in the firewall in ’72.

Thanks much, I'm hoping to get back out in the shop to have a look tonight!

 

[Kobrak]

Looking at your picture again, doesn't look to be black with a white tracer, certainly not a 12 ga wire. Looks more like gray with black trace, 18 ga or smaller. If so, that would likely make it the tach signal wire (T11 20GY*). Where does it go to, if it’s the tach wire it should route to a gromet in the firewall in ’72.

72RR, I was able to have another look yesterday and I confirmed the tach wire (Gray White) is in place. The wire in question is definitely Black/White.

 

[Nacho-RT74]

Ok, so, the mistery continues.

As mentioned, just the headlights and the A/C-heater plug harnesses could get a thick black wire around. Can’t recall if the headlights is traced. It comes straight from the main ammeter/alt wire splice so is hot all the time. The black traced for the A/C-heater is spliced into the ACCs network, so is switched on by the ign switch coming from fuse box.

This is assuming is part of the underdash harness and NOT an added wire by some other ACC harness, or non original added accesory

 

[Nacho-RT74]

Headlights power in wire is also traced white.

 

[Nacho-RT74]

Please, check the headlights switch plug. They tipically melts just right at that wire location.

Maybe the melted cavity was replaced by that divorced single plug

 

[Vaanth]

If this Charger SE has tilt steering, the black with white tracer wire connected to the heater/air conditioning control now is likely C1-12BK* which originates at the steering column through an inline fuse. In this case, the C1-14BK* black with white tracer wire is unused and was originally supposed to be taped back in the harness. The tape back operation may have been missed, or it has been untaped and exposed over the years. This wiring can be seen in the following image:

This wiring is shown in Figure 20 on page 8-152 of the wiring diagrams in the 1972 Dodge Chassis Service Manual.

To verify that this is the unused C1-14BK* black with white tracer wire, with the battery disconnected, check for continuity between the loose terminal and the heater/air conditioner fuse at a the accessory bus bar in the fuse block.

 

[Nacho-RT74]

Good to know and very interesting!

 

[Kobrak]

If this Charger SE has tilt steering, the black with white tracer wire connected to the heater/air conditioning control now is likely C1-12BK* which originates at the steering column through an inline fuse. In this case, the C1-14BK* black with white tracer wire is unused and was originally supposed to be taped back in the harness. The tape back operation may have been missed, or it has been untaped and exposed over the years. This wiring can be seen in the following image:

View attachment 1895798

This wiring is shown in Figure 20 on page 8-152 of the wiring diagrams in the 1972 Dodge Chassis Service Manual.
View attachment 1895797

To verify that this is the unused C1-14BK* black with white tracer wire, with the battery disconnected, check for continuity between the loose terminal and the heater/air conditioner fuse at a the accessory bus bar in the fuse block.
View attachment 1895800

Vaanth, thanks for this. The car does have the tilt column! Another mystery solved on this car. Thanks again!