Wire a nutral safety switch 3 prong in a 67a body

[D.Coulter]

Just looking for insight on how to wire a nutral safety switch 3 prong In a 67 ...not original trans....i do not have the wiring harness...thanks

 

[Cuda Al]

Get a pigtail like this
44CS31N Neutral Safety Switch Connector Fits 1969-1974 Dodge W100 Pickup | eBay
and use the center wire only.


Alan

 

[TrailBeast]

Just looking for insight on how to wire a nutral safety switch 3 prong In a 67 ...not original trans....i do not have the wiring harness...thanks

The center pin grounds when in park or neutral.
One wire from that pin attached to your starter relay ground terminal should do it. (Terminal 2 is the one to connect to)

That terminal on the relay has to be grounded for the starter to activate.
The center pin on the trans switch does that in park or neutral.

 

[D.Coulter]

That was easy...thanks guys...long live mopar

 

[D.Coulter]

The center pin grounds when in park or neutral.
One wire from that pin attached to your starter relay ground terminal should do it. (Terminal 2 is the one to connect to)

That terminal on the relay has to be grounded for the starter to activate.
The center pin on the trans switch does that in park or neutral.

View attachment 1716134110

That was easy...thanks guys...long live mopar

Ok, so here is another question....useing that pig tail NNCS31N, wired the way you said, will it operate the reverse lights, if not what do i need to do for those as they are not functional now. How they are new and wired into the new painless harness.

 

[TrailBeast]

Ok, so here is another question....useing that pig tail NNCS31N, wired the way you said, will it operate the reverse lights, if not what do i need to do for those as they are not functional now. How they are new and wired into the new painless harness.

The two outer pins on the switch on the trans are for reverse lights.
Power goes to one (really doesn’t matter which) and the other goes to the reverse lights.
Basically it just passes power from one pin to the other when in reverse.
Wire it to full time 12v if you want the reverse lights to be able to come on without the ignition having to be on. (Like brake lights normally are wired)

 

[Mattax]

To use the reverse light switch in the later NSS with a '67, follow the '67 4-speed reverse wiring.
This assumse the transmission has the matching rooster comb.

New wiring for our ‘67 B’cuda

The previous owner would have embarrassed the guys on Roadkill. Due to the number or cut wires, spliced in wires, disconnected wires and the general lack of color coding, I purchased new harnesses from M&H Electric Fabricators. Expensive, but damn nice… except … Why can’t they label their...

www.forabodiesonly.com

 

[RedFish]

For the 67-model w/ automatic trans, reverse lamp switch was in the cabin, mounted on the steering column or on the floor shifter. This circuit was not fused. Those are the 2 wires you'll need to route down to the later trans mounted switch (a purple and a purple w/white tracer if my memory serves).
Early on, one of the 3 bulkhead connectors was typically referred to as wiper connector simply because it had no other wiring in it. When the reverse lamp wires needed to go out and down to the trans, 2 of the previously unused ports in that connector were where these 2 wires were placed to get out of the cabin.
The reverse lamp circuit was fused for 68 model. Without referring to FSM wiring diagrams, I think they added this to the radios fused circuit.
I can't get onboard with hot at all times as suggested above. My reason being, a fault at brake lamp switch is a built-in battery killer. Why add another? I never really found the logic in having hot at all times brake lamps but... every brand was wired so for a lot of years.
I just recently noticed the brake lamps on my 2010 RAM are not hot with switch off.

 

[D.Coulter]

Thanks for the help guys ....i guess I'll start the hunt and see how it goes....I'll post the end results....
V/R
Coulter

 

[Josecuda]

The two outer pins on the switch on the trans are for reverse lights.
Power goes to one (really doesn’t matter which) and the other goes to the reverse lights.
Basically it just passes power from one pin to the other when in reverse.
Wire it to full time 12v if you want the reverse lights to be able to come on without the ignition having to be on. (Like brake lights normally are wired)

Ok, I know its an old thread but having similar issues here.

727 in a 68, using a 3 pin switch.

First Pin has 12 volt power
Middle Pin is wired to starter relay ground
Third Pin goes to the rear backup lights (terminal #6 on bulkhead behind kick panel)

When I shift to reverse the backup lights don’t work and pins show:

First pin still has 12 volt power
Middle pin is no longer ground,
Third pin shows no voltage

What else should I check to make it work?

 

[Mattax]

There are two versions of the three prong switch. See pictures here

neutral safety switch/ reverse light unit in trans

I need a reality check. I had some problems with my neutral safety switch engaging, so I got a new one several weeks ago. Now car starts fine, but I realized that I lost my back-up lights. I put the car up and unplugged the switch at the trans and jumped the outer two sockets in the wire plug...

www.forabodiesonly.com

Build drawings show the three prong harness for the 69 Model Year, either from the beginning or starting Jan of '69.

'68 would have been built with just a neutral safety switch on the automatic transmission.
Part numbers in this thread.

Single wire reverse light switch for 68 Barracuda

I need a part number for a single wire reverse light switch for the 727 in my 68 BarracudThe local NAPA can only come up with the normal 3 pin style and a 2 spade style? Any help would be appreciated Thanks

www.forabodiesonly.com

The three prong switch needs the correct 'rooster comb" in the transmission.

So if its a 68 transmission, without taking it apart, just use a single terminal neutral safety switch in it.
Then the reverse light wires either get connected to a switch on the steering column or in the center console with a gear selector.

 

[Josecuda]

There are two versions of the three prong switch. See pictures here

http://[URL]https://www.forabodieso...se-light-unit-in-trans.549001/post-1974451359

[/URL]

Build drawings show the three prong harness for the 69 Model Year, either from the beginning or starting Jan of '69.
View attachment 1716366751

'68 would have been built with just a neutral safety switch on the automatic transmission.
Part numbers in this thread.

http://[URL]https://www.forabodieso...itch-for-68-barracuda.490656/#post-1973449709

[/URL]
The three prong switch needs the correct 'rooster comb" in the transmission.

So if its a 68 transmission, without taking it apart, just use a single terminal neutral safety switch in it.
Then the reverse light wires either get connected to a switch on the steering column or in the center console with a gear selector.

Ok this is not the original transmission, not sure even which year it came out of. Gotta check that.

 

[Cuda Al]

Ignore the backup switch on the transmission and keep using the one in the car.
Just wire the neutral safety switch to the center wire on the3-pin switch.


Alan

 

[TrailBeast]

Ok, I know its an old thread but having similar issues here.

727 in a 68, using a 3 pin switch.

First Pin has 12 volt power
Middle Pin is wired to starter relay ground
Third Pin goes to the rear backup lights (terminal #6 on bulkhead behind kick panel)

When I shift to reverse the backup lights don’t work and pins show:

First pin still has 12 volt power
Middle pin is no longer ground,
Third pin shows no voltage

What else should I check to make it work?

I see you got the answer to your question.
My shifter has the backup lights switch provision on it, but the 42RH trans has the functional 3 terminal switch, so I used it.