No Reverse Lights - Switch Replacement? (1 Viewer)

Joined
Mar 14, 2018
Messages
22
Location
Atlanta, GA
Trying to resolve my reverse lights issue but I'm running into a roadblock. Already checked fuses/bulbs and all are good, which leads me to believe that it could be an issue with the switch. Anyone know where the reverse light switch is located on a 1994? We looked over the transmission (A442f) but couldn't figure it out. Any leads would be helpful - even better with pics - unless we're looking for the wrong thing entirely. Thanks!
 
Joined
Feb 7, 2015
Messages
696
Location
Eastern Washington
Looking at the wiring diagram for my 1997 (yeah not the same year but may be close) there is a wire (red/blue) that runs from the ECM and then branches to the combination meter (read that as instrument panel), the Auto Trans indicator switch and the reverse lights. It appears the power routes from the battery, through the AT Indicator Switch and then to the ECM, instruments and lights.

It's hard to tell in the FSM but the position switch looks to be connected to the transmission and is attached to the gear selector in the cab by some linkage.

You checked fuses and bulbs but did you verify 12V at the light socket when in reverse? There are a couple connectors along the way that could have issue and there is also a white/blue wire that runs for ground. On mine it's connects in one of the rear quarter panels so verify that is in good shape too. If your grounds are good and there is no 12V at the socket I'd start at the indicator switch and trace the red/blue wire checking for power along the way.
 
Last edited:
Joined
Mar 25, 2005
Messages
2,131
Location
Edmond, Oklahoma
How’s the R indicator light on the dash? Lit up when in reverse? Others normal? I have a 94 that the transmission started out in 2nd gear occasionally and the reverse lights were out. Can’t remember exactly but the indicator lights had some issues as well and the Neutral Safety Switch barrel plug was corroded.
The NSS determines what gear PRND2L you are in and a corroded plug will affect this operation. Common problem here due to its location. Might check there.
 

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