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Unread 05-04-2015, 09:42 PM   #1
p1garcia
Registered User
1990 YJ Wrangler 
 
Join Date: Nov 2006
Location: california
Posts: 3
Neutral safety switch/backup lights

Hi, I've replaced my neutral safety switch on my 90 4.2l automatic after my backup lights stopped working. Trouble is now my backup lights also work while I'm 2nd gear and 1st gear. Anyone else had this problem before? I tried two different brand nss switches before getting an original mopar one. All switches have the same result.

I also replaced the harness for the switch but it didn't make a difference. I'm thinking it may be the comb lever inside the transmission pan that touches the switch. Anyone ever swapped this out? Where can I find more info for this?

Thanks,

Phill

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Unread 05-05-2015, 10:57 AM   #2
Que89YJ
Web Wheeler
1989 YJ Wrangler 
 
Join Date: Apr 2008
Location: Detroit, Michigan
Posts: 17,965
http://www.jeepforum.com/forum/f12/n...roblem-355591/

Read the installation instructions carefully. I think its an installation issue. Its near the bottom of the thread.
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Unread 05-05-2015, 06:45 PM   #3
p1garcia
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1990 YJ Wrangler 
 
Join Date: Nov 2006
Location: california
Posts: 3
Quote:
Originally Posted by Que89YJ View Post
http://www.jeepforum.com/forum/f12/n...roblem-355591/

Read the installation instructions carefully. I think its an installation issue. Its near the bottom of the thread.
Thank for the link. I read through the thread. The install instructions are for a different kind of nss than the one on mine. The switch in mine is the three prong style that attaches to a female plug. I can't find much info on installing this type of switch. It just threads on and plugs into the harness. I've tried installing it with all the different gears on. No go.
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Unread 06-28-2015, 09:48 PM   #4
p1garcia
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1990 YJ Wrangler 
 
Join Date: Nov 2006
Location: california
Posts: 3
Update just in case anyone else has this problem. I ended up biting the bullet and taking my Jeep to a transmission shop. End result was the pan was removed and the internal gear selector comb switch had to be swapped out. Looks like the inside plastic piece that touches the nss sensor broke at the end where the drive, 2nd, and low gear would have pushed the sensor. This caused the backup light to turn on in gear.
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