The reverse lights on my truck were either not coming on, or would occasionally flicker on/off when stepping on the gas (extra pressure applied to switch in tranny). I first unplugged the switches connector testing continuity between the pins when the transmission was in reverse, and never got a reading. I removed the switch and found that it would only sometimes make the proper connection when pressed a specific way, so I knew the switch was bad.

You might have to get creative with this switch removal as there isn't a ton of space to work with. I tried a 19mm crows wrench, but it was too thick to fit around the switch, so I purchased a stubby wrench set, cut the 19mm wrench down to 3 1/4 inches long, and used an angle grinder to cut a slot for the wires to go through.

Please don't purchase the cheapest switch you can find, because some of the aftermarket ones don't reach far enough into the transmission to make contact with the reverse pressure indicator. I would instead recommend getting this OEM part from somewhere such as nissanpartsdeal.com.

Switch P/N: 32005-21U1B

The complete list of items used in this project, and other projects, can be found in the Parts List below.