Neutral switch/lost connector

[6T7Merc]

I know ive posted previous threads concerning my neutral switch for my 67 merc but ive come across other things to confuse me.
When i bought the truck there was no neutral switch on the truck. Neither on the steering column or my tranny(c6). There is no free connector on my harness which would have lead to the switch which came from factory and there are no cut offs. The only connector that i can find that seems to be it would be the one in the picture i have included but i found it with the plug in exactly like in the picture. If anyone has any ideas or help that would be great as i am switching to a 79-78 tilt and have to have someway of hooking it up. I have purchased a new switch im just looking for the connector. Thanks in advance.

[Thunderfoot]

That is the wiring for it that connector on the end of it that has the wires looped back on itself, is the jumper connector for use with a manual transmission.

It is the (H) connector in this diagram for the 67 http://www.fordification.com/images/sch ... gauges.jpg
One wire is for the neutral safety (#32) and the other is for the reverse lights (#140).

You can cut those loops in half and wire it into the wires going to the neutral safety switch on the transmission (for the newer style setup)...

[6T7Merc]

Thanks! Thats good to know. The only thing im confused about is where the neutral switch went before since there still is that loop connector and i dont have a manual transmission!

[Thunderfoot]

In 67 the truck never came with a C-6 trans, the only automatic that was avalible was a Cruise-O-Matic.

You should be able to decode what your truck came with here http://www.fordification.com/data-1967.htm unless there is something about the Candian trucks that is differant...

1967 Transmission code found on the data plate on the door.
TYPE ------------------------------CODE
4-Speed New Process (NP-435)- A
3-speed overdrive ----------------B
3-speed Ford Light Duty ---------C
3-speed Ford Medium Duty (T89F)- D
3-speed Ford Heavy Duty (T87G)- E
4-speed Syn. Warner (T18)- ----F
Cruise-O-Matic -------------------G

As the more popular trans was a manual transmission back then, one of the previous owners must have put in the C-6 and installed a automatic steering column out of another truck to convert it over.
From the looks of it they never connected the neutral switch off the column when they did this...

One other thing you can do to confirm this is look at the wiring in the engine compartment just below the steering shaft there should be a 2 wire connector that has Black-Red stripped wires on it and the connector is "L" shapped. This is the wiring for the reverse lights when you have a manual transmission. With a manual trans there would be wires plugged into it that go to the reverse light switch that is on the trans or the bottom of the column depending on the manual trans used. For an Automatic transmission there will be a short Jumper connector plugged in it.
So if you look at this and it has no Jumper connector in it then that would also point to it having had a manual transmission before...

[6T7Merc]

Thunderfoot,

I took a look at my VIN plate and found the transmission code to be C. I guess this is a change in the Mercurys also meaning that my orig trans was a c6?
I also took a look again under my dash and no such wires for the reverse lights exist. The only one found is the one in the diagram i earlier noted.

[Thunderfoot]

Thunderfoot,

I took a look at my VIN plate and found the transmission code to be C. I guess this is a change in the Mercurys also meaning that my orig trans was a c6?
I also took a look again under my dash and no such wires for the reverse lights exist. The only one found is the one in the diagram i earlier noted.

C= 3-speed Ford Light Duty = 3spd manual transmission, this is the standard equipment transmission in the truck and it would have had a column shifter...

The connector for the reverse lights is on the engine side that I was talking about. Here is a picture of the one on my 4sp manual trans that is floor shift so the switch is on the trany in mine. The 3 speed column shift had the switch on the column in the engine compartment. For an automatic there will be a short jumper wire here...

[SteveC]

AH HA that is what that thing is ....i wondered for ever what that thing was

[6T7Merc]

my truck is nto or ever was a manual and there is no such connector in the engine compartment for the tranny. I dont know whats up with it...

[mrsnicks]

I am very interested in this thread. My truck was originally a manual, so the wires under the dash just have loopback wires on the connector.

Does anyone know what would be required to get the neutral safety and reverse lights working on a manual wiring harness, when an automatic was put in the truck.

Thanks!

Patrick

[Thunderfoot]

I am very interested in this thread. My truck was originally a manual, so the wires under the dash just have loopback wires on the connector.

Does anyone know what would be required to get the neutral safety and reverse lights working on a manual wiring harness, when an automatic was put in the truck.

Thanks!

Patrick

Patrick,

Depends on which column or neutral safety switch you have / use. If you have the stock 67-72 auto column in your truck you just hook up the neutral safety switch to the column and plug it in where that jumper (loop back wire) is under the dash. If you have a later model trans / column the neutral safety switches were mounted on the trans and you just need to run the wires inside and hook them up to that same jumper under the dash.
The neutral switch also has the reverse light switch in it (on both types I listed above).

For the reverse lights to work though you need to make a jumper for the engine compartment wire. This will complete the circuit for the reverse lights to work.

Here is a picture of my 69 with Factory automatic and the Factory jumper it has.

[rjewkes]

well now i know what that jumper there is now cool.

[KF100TK]

How would you get the neutral safety switch and reverse lights to work when you have a B&M shifter on the floor?
I have the old C-6 so i don't have the new style trans safety switch.

[fordman]

i think you can put the new style trans switch on your old trans. but you have to drill the trans riser thigns to get it to bolt on. and you may have to do something else. i forget. maybe the shaft hasd to be changed i can't remember for sure.

[KF100TK]

I am trying to avoid adding the new switch because the exhaust is in the way and i don't have a right angle drill
to tap the new holes.

[Thunderfoot]

How would you get the neutral safety switch and reverse lights to work when you have a B&M shifter on the floor?
I have the old C-6 so i don't have the new style trans safety switch.

Check with B&M with the model shifter you have, they should have a switch that mounts in the shifter for this.