NSS or backup switch

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Apr 7, 2016 | 04:20 PM

black & blue 78/9

Thread Starter

Laughing Gas

Joined: Mar 2016

Posts: 757

Likes: 43

From: Cheyenne, Wy

NSS or backup switch

I'm trying to fix the backup lights on my 79 Bronco. 1156 bulbs are good. Grounds are good because tail/brake lights and marker lights work. I have continuity between reverse light sockets and between the rev sockets and the connector underneath by the rear bumper. I can not find the backup switch on the transmission.
Which is more likely to be bad, the NSS or the backup switch? OR should I be looking at something else? C6 automatic, 351m
Thanks for your help.

Last edited by black & blue 78/9; Apr 7, 2016 at 04:29 PM. Reason: Let out info

Apr 7, 2016 | 04:29 PM

mikeo0o0o0

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Joined: Apr 2009

Posts: 14,333

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From: Stanley, VA

Quote:

Originally Posted by black & blue 78/9

I can not find the backup switch on the transmission.
Which is more likely to be bad, the NSS or the backup switch? OR should I be looking at something else?
Thanks for your help.

It's the same switch, two functions, one switch. 78-79 should be on the side of the transmission, where the manual selector arm is.
If it's not there then I would say that's your problem.

Apr 7, 2016 | 06:35 PM

SlikWillie

Cargo Master

Joined: Sep 2013

Posts: 3,256

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From: Pryor, OK

On the drives side of tranny. Remove the "J" arm, then remove the two small bolts, then slide it off the shaft. Disconnect the wire connector. Install in opposite order.