Back up lights

[Matt Palguta <mpalguta@domain.elided>]

Hello,
    It doesn't matter which of the OUTER two pins are connected to the fuse panel or to the lights. In reverse the switch just makes a connection between the two pins. Current flows from the fuse through the switch to the bulbs then to the infamous local grounds at or near the bulbs.


>  Date: Mon, 18 Jan 1999 13:45:45 -0500
> From: "The Staub Family" <jstaub@domain.elided>
> Subject: 3 prong switch on transmission.
>
> The 3 prong switch has the backup lights AND the neutral safety. The middle
> pin is the neutral safety and is switched to ground when the transmission is
> in Park or Neutral. The outer two are for the backup lights. The IHC manual
> shows one going to the fuse block and the other going to the lamps, but
> doesn't say which. Good luck,
> John
>
> <<Date: Sat, 16 Jan 1999 09:38:03 -0700
> From: "Phillip L. Knapp O.D." <plknapp@domain.elided>
> Subject: Reverse (Back up) Lights on 74 IH Pickup
>
> Hey List,
> I'm trying to get my backup lights back in working order (after being
> pulled over by the police for no license plate light).. I've got the bulb
> receptacles rewired, and all is working, but I don't have a clue
> where the switch on the transmission linkage is to turn them on. (I
> don't want to make the wife crawl under the pickup and touch the
> wires together EVERY time I backup <Grin>). I've noticed the 3
> prong electrical connection to the transmission.. but I thought this
> is the neutral safety... can it be reverse switch also?
>