The PO put post 66 tailights in our 66 and it has the capacity for backup lights. Our truck also has a 73 C6 and so I believe has the back-up light neutral safety switch on the tranny. Can anyone point me to a wiring diagram that would show the set up? My 66 diagram of course does not have backup lights diagrammed. Thanks for the help

 

1967/77 F100/350's use the same steering column mounted NSS regardless of what A/T they have: C7TZ-7A247-A .. NSS (Motorcraft SW-600).

1978/79 F100/250 with C4's use a different NSS than F100/350 with C6's. Both NSS's are located on the transmission.

 

Bill, what would that column mounted NSS look like? Never noticed anything unusual on the column and I have NSS function. WOuld the backup lights work from that NSS switch. There is definitely a switch of some sort on the passenger side of the C6. This truck is a real frankenstein. The C6 could be a later model.

 

1967 was the first year that backup lights were available for trucks, Bronco's and Econolines.

1967/72 F100/350 Styleside tail lamps that have the backup lamp lenses encompassed within the tail lamp lenses can be installed in 1964/66 F100/250 2WD & 1966 F100 4WD Stylesides.

The NSS selector lever attaches to the shift tube thru a hole in the steering column shroud. Its knife blade end fits into the NSS.

The lever is the same 1965/77 F100/350, so if your truck has an A/T, it's already present.