what is this

edison1970 · December 10, 2017, 08:58:46 AM

Wiring the dash and using a harness from a 74. What is this blue box over the heater controls?

anlauto · December 10, 2017, 09:26:06 AM

Possibly some sort of seat belt interlock system ? I'm not sure.

Cuda Cody · December 10, 2017, 11:07:41 AM

I'm not sure. Never seen that connector before.

1 Wild R/T · December 10, 2017, 11:20:50 AM

Like Alan said, seat belt module...

edison1970 · December 10, 2017, 02:04:25 PM

I popped the cover on it and there is a circuit board inside. Quite a few wires going into it. My factory manual is from 1970 so it doesn't show it. Otherwise, most of the harness is the same.

Roadman · December 10, 2017, 02:25:07 PM

Looks to have a 12 gauge yellow and a 12 gauge tan in it.

Car have power windows. Does one of those wires go to the ammeter ? I'll try to find a 74 wiring diagram, that will tell us.

dodj · December 10, 2017, 02:31:26 PM

As Alan and Wild have said.........seat belt module...'74 only.
The ones I have are orange. Never seen them in blue b4.

71vert340 · December 10, 2017, 03:24:41 PM

My 74 Charger has that seat belt interlock module. I've seen them in white, blue/green and Yellow-tan/orange. Here it is mounted on my 74 Charger dash frame.
Terry

Roadman · December 10, 2017, 03:34:30 PM

I'm studying these ----http://www.mymopar.com/downloads/1974/74ChallengerB.JPG http://www.mymopar.com/downloads/1974/74ChallengerA.JPG But they don't say the gauge of the wire.

We will figure it out.

edison1970 · December 10, 2017, 03:51:19 PM

If it is for the seat belts, what does it actually do? Since mine is not a 74, do I need to be concerned? Just want to make sure I don't run into an issue like the car won't start without the belts.

Roadman · December 10, 2017, 04:29:55 PM

Quote from: edison1970 on December 10, 2017, 03:51:19 PM
If it is for the seat belts, what does it actually do? Since mine is not a 74, do I need to be concerned? Just want to make sure I don't run into an issue like the car won't start without the belts.

I think, but not sure that trying to use a 74 harness is going to work . I will continue to research.

cuda hunter · December 10, 2017, 04:52:06 PM

Just to show it, this orangish one is on my 74 charger.
With the stupid seat belt and seat bottom sensor. Got that reset switch in the engine bay to go along with all that crap.

1 Wild R/T · December 10, 2017, 05:21:13 PM

What year is your car? Mixing years on a harness can be a mistake.... Lots of components stay the same but harnesses definitely change allot from year to year & model/option pkgs.... The 74 seat belt interlock does lock out the starter unless the belt is buckled when the weight sensor in the seat shows there is enough weight on the seat to close the contacts.... It can be bypassed but it just shows you need to know what your getting into when swapping harnesses..