Dash harness question

[Sonny]

I am replacing my dash harness (one with the bulkhead connector and fuse box) in my '70 Belvedere. There is a white ground wire that attaches to the underside of the steering column and branches off with a double white wire with round plug near the wiper switch and a single white wire with round plug near the headlight switch. I used and ohm meter and they are all the same wire. These wires are loose on my old harness (not connected). Can someone tell me where they attach if at all?

 

[Bill Monk]

Not sure but you find find the answer you are looking for here:

http://www.mymopar.com/index.php?pid=27

 

[Sonny]

Not sure but you find find the answer you are looking for here:

http://www.mymopar.com/index.php?pid=27

Thanks. This one is better than the assembly manuals but still doesn't show the ground.

 

[PurpleBeeper]

Can you possibly get any picture of these wires? Are they ground wires or not really connected to anything? In your/my harness, there are several wiring "dead ends" for wires going to options that you/me don't have. In most cases, they just made one wiring harness & if a car didn't get a particular option, the wires are still there, just not hooked up to anything.

I have a 70 Road Runner & what you describe "sounds" like ground wires. I have white ground wire going to my headlight switch. I have a black wire that goes from basically the steering column to the steering column support bracket (steering wheel ground - wire about 6" long), but no white wire on my column. I "think" there's a ground wire near the wiper switch that goes to the windshield washer button, but I can't remember for sure OR what color it is.

The only other "single wire" coming out of my column is yellow (not white) and it goes to either the key buzzer or light for the key (A01 light package), but I can't remember between those two off the top of my head.

 

[Sonny]

Can you possibly get any picture of these wires? Are they ground wires or not really connected to anything? In your/my harness, there are several wiring "dead ends" for wires going to options that you/me don't have. In most cases, they just made one wiring harness & if a car didn't get a particular option, the wires are still there, just not hooked up to anything.

I have a 70 Road Runner & what you describe "sounds" like ground wires. I have white ground wire going to my headlight switch. I have a black wire that goes from basically the steering column to the steering column support bracket (steering wheel ground - wire about 6" long), but no white wire on my column. I "think" there's a ground wire near the wiper switch that goes to the windshield washer button, but I can't remember for sure OR what color it is.

The only other "single wire" coming out of my column is yellow (not white) and it goes to either the key buzzer or light for the key (A01 light package), but I can't remember between those two off the top of my head.

Pictures:
I'm thinking it's not a ground.

 

[PurpleBeeper]

Dang Sonny, my wiring harness is NOT like yours. Obviously, that white one with a hoop on the end is a ground, but the double white wire with the female bullet connector??????

Can you compare it vs. your old wiring? Maybe the new harness has the correct wires, but different colors? Maybe it just got taped a little off so the routing of the wires is deceiving? Geez....I'm not sure, thought the one "double white" wire does look familiar.

Do you have a factory wiring diagram? If not, PM me and I will send the pages you need out of the factory service manual.

 

[Sonny]

Dang Sonny, my wiring harness is NOT like yours. Obviously, that white one with a hoop on the end is a ground, but the double white wire with the female bullet connector??????

Can you compare it vs. your old wiring? Maybe the new harness has the correct wires, but different colors? Maybe it just got taped a little off so the routing of the wires is deceiving? Geez....I'm not sure, thought the one "double white" wire does look familiar.

Do you have a factory wiring diagram? If not, PM me and I will send the pages you need out of the factory service manual.

It actually matches my original. Remember I have a low optioned Belvedere not a rr or GTX. I can't find it on any electrical drawing, plus the originals are all unhooked except for the circle terminal. Plus all 3 white ends "ohm" positive.

 

[PurpleBeeper]

It actually matches my original. Remember I have a low optioned Belvedere not a rr or GTX. I can't find it on any electrical drawing, plus the originals are all unhooked except for the circle terminal. Plus all 3 white ends "ohm" positive.

Geez... I wish I could help more. I would be surprised if the low-option Belevedere had a different wiring harness than Satellite/RR/GTX. The only "odd ball" part of the dash harness I've ever noticed is the with/without Tic-Toc-Tach wiring.

I can't think of how it would help you, but I do have an old Belvedere harness I pulled out of a salvage car many years ago. It's boxed up in my garage somewhere. I mainly got it for the connectors and such if I ever needed one.

 

[Wietse]

Where is the circle terminal connected on then at the old wiring?
And if these other 2 are also on the old wiring, do the also test positive with Ohm meter?
(Same test as you did on the new wiring harness)
If so my guess is it will be a ground, the other 2 terminals will be for optional accessories that your car does not have.

Actually the wiring (blue and grey) for the tic-toc-tach are a separate harness, well at least for the Coronet it is.

 

[Sonny]

Where is the circle terminal connected on then at the old wiring?
And if these other 2 are also on the old wiring, do the also test positive with Ohm meter?
(Same test as you did on the new wiring harness)
If so my guess is it will be a ground, the other 2 terminals will be for optional accessories that your car does not have.

Actually the wiring (blue and grey) for the tic-toc-tach are a separate harness, well at least for the Coronet it is.

It's bolted to the frame behind the wiper switch (lower right behind pink wires in pic):

 

[Wietse]

Well, if anything is bolted on the frame you can say for sure it is a ground wire.
Anything else will short on this connection.
Probably the other 2 plugs will be for i.e. a gauge assembly, radio, a/c, etc. as an additional ground wire.
Like on a rallye gauge dash it is grounded by the frame itself, i think a dedicated ground wire on each assembly is a better option though.

In your case i would wire it back the way it was, if everything works it's ok.
In the meantime i would try to find some more info/drawings for your specific car.

 

[threewood]

On my 69, the only white wire I can think of goes to the brake switch which is essentially a ground for the brakelights when depressed

 

[PurpleBeeper]

View attachment 431289
It's bolted to the frame behind the wiper switch (lower right behind pink wires in pic):

Hey Sonny, I pulled out the old '70 Belvedere harness in my garage last night and it does have those white wires (I'd cut off the loop). Unfortunately, I did not mark the wires to know where each one goes, but I unwrapped some tape to verify that you have exactly what you think. Those white wires are all connected & don't splice/connect in with anything else. I wish I could be more help.

 

[Sonny]

Hey Sonny, I pulled out the old '70 Belvedere harness in my garage last night and it does have those white wires (I'd cut off the loop). Unfortunately, I did not mark the wires to know where each one goes, but I unwrapped some tape to verify that you have exactly what you think. Those white wires are all connected & don't splice/connect in with anything else. I wish I could be more help.

Thanks for checking for me. I'm not going to worry about it however I think I will hook my gauge pod ground to it.

 

[oldbee]

Extra grounds never hurt!