Clean Your Neutral Safety Switch A442F

[93yotasr5]

I’m gonna order some lithium grease so that I can do this. My reverse lights work but I get the intermittent start I have replaced the starter, The wires that go to the starter, all of my grounds and fusible link. This is the only other thing I can think of that might be causing my issue.

 

[calokie]

I’m gonna order some lithium grease so that I can do this. My reverse lights work but I get the intermittent start I have replaced the starter, The wires that go to the starter, all of my grounds and fusible link. This is the only other thing I can think of that might be causing my issue.

Thanks for the thread resurrection! wonder if the OP is still around to describe the "slipping in reveres", was this like a grind when going from drive to reverse?

 

[xetura]

Thanks for the thread resurrection! wonder if the OP is still around to describe the "slipping in reveres", was this like a grind when going from drive to reverse?

I was having issues not being able to stay in 1st/L. Replaced the NSS and all is good.

 

[skw6r]

Bumping this thread as I am having similar issues. Intermittent starting issues (no crank with charged battery), hard shifting into reverse, R and D dash lights go on and off if I jiggle the shifter, reverse lights also work intermittently with jiggling of shifter. I’m assuming since the connection can be re-established by moving the shifter it’s more likely the contact points in the NSS versus corrosion at the connector that are causing the problem.

 

[tech_dog]

My 94 is shifting and starting fine, but my N light on the combination meter fails to light 90% of the time, occasionally coming on. All bulbs are new, and all other PRND2L indicators work normally.

Unless I'm missing something the EWD doesn't have a lot of info, but I suspect it's either the C13 or B1 connectors, image below. I'm guessing it's not a problem with the A/T indicator switch at the top right of the image, because the transmission is indeed shifting into neutral and I have no issues starting. It seems B1-1 must be going to +12 or I wouldn't shift to neutral.

I'm also pretty sure this is distinct and different from the park/neutral switch, which I believe directly reads the actual transmission mode, not the shift lever position.

Has anyone else serviced this AT/Indicator switch, top right of first diagram, or even know where exactly it is? I can't find a diagram that makes it clear, but included the closest below. I want to check the signal path to get this figured out.

Thanks,

T.

 

[bunkbed]

This thread really helped me out. I had no reverse lights, no PRNDL2 lights on my dash, and shifting into reverse from any gear was rough. No issues with starting the truck. Pulled off my park/neutral safety switch (which was a pain), and some of the prongs at the end of the harness were very corroded. One prong actually snapped off completely. Replaced with a new part and all symptoms resolved.

The hard part of this job is getting to the electrical connections which are routed up over the transmission and through the firewall. I had to do all the work from under the vehicle as my truck is a LHD and there's too much in the way from above. Probably a lot easier if you had a real lift. The OEM NSS part was about $180 shipped.