To all
I could use some help on wiring again. I am working on my 70 wagon. It appears that this was a three speed vehicle, but has been switched to a auto. Where originally would I find the backup lights swith. I am assuming this would have been some sort of manual switch attached to the tranny- that when you put it in reverse it completed the circut and the lights came on? I am guessing the switch is not there but maybe the pigtail still is- what color is the wiring and is it located by the tranny? How about for an auto- how does it work?

 

The three speed manual tranny had the backup light switch on the steering column at the shift linkage. The C4 automatic has a combination neutral safety and backup light switch mounted to the shift lever shaft on transmission. Picture is of the C4.

 

great post, Richard!
Is the schematics for the "other end" of it available? Either the manuel or (the C4 came in '73) auto?

 

All the wiring diagrams can be found here: SeaBiscuit68

 

Thanks Richard, looks like the BU lght switch ('73 plus) comes out @ same place w.washer & radio do.

 

Thanks for the photo- I think I am more of a visual kind of person- to see it helps. The c-4 does not have the switch intalled, but it came with the truck with boxes of other stuff. So I am sure I can install it back. My question is that if this truck was originally a three speed (still has shifter collar) but now has BM shifter on the floor. Can I wire the auto switch in? I replaced the turn signal wiring switch in the steering column and do not remember any wires that were not used that might have gone to the back up switch? I am also curious- I know the later trucks came with a nuetral saftey switch- did a 70 have one? I am assuming not-I have seen people loop them back into itself to bypass the switch, but would have noticed that. So if I wire the switch that came with the tranny (75) that has a combined switch- will it work? This truck has an antique tag on it- so It does not need inspected, but I would like back up lights- in your opinion would it be easier to just put these lights on a toggle switch and call it done?

 

Yes, you can use a toggle switch for the backup lights, but would highly advise wiring in the NSS. Most aftermarket shifters have provisions for at least one switch. I have no experience with the B&M, but see no reason why you can't use the stock switch.You will have to determine that.

 

a toggle switch
That's what I did. May depend on the Inspection station. B4 I had it I just left in the lenses w/o a back up lense in. Our state - if not equiped, not needed. Now da guy sez: "wipers, lights, back up" & I just flip em on.

 

a toggle switch
That's what I did. May depend on the Inspection station. B4 I had it I just left in the lenses w/o a back up lense in. Our state - if not equiped, not needed. Now da guy sez: "wipers, lights, back up" & I just flip em on.