mustwarnorcas

Hey all, so close to getting my jeep ready for the road. Just having some issues with my reverse lights. So wiring to the lights is good and the bulbs are good. However, When it comes to the plug for the reverse switch, I'm not getting power. Theoretically, I believe that I should get power to one side of the plugs for the reverse switch. I've tried tracing the power wire to the switch but to no avail at the moment. What should I be checking to get power to the switch?



Here is the reverse switch plug where I believe one side should be getting power. Neither side gets power.



This is the wiring from the plug into the cars wiring.

EZEARL

AW4 transmission? The backup lights are controlled by the NSS(neutral safety switch)on the trans. Have you had any dealings with it?

00t444e

Check your neutral safety switch on the passenger side of the transmission. The contacts inside of it get dirty over time and will cause the reverse lights to not work and sometimes it won't start in park or neutral without wigging the shiftier. I had this problem and I had to replace the whole switch because I live in the rust belt and couldn't get it off with out breaking it. It fixed the reveres lights.
Here is a video on this

mustwarnorcas

My bad, I should've clarified. I have an 88 xj with the Aisin 5 speed. I've taken the reverse switch out and it didn't appear worn.

djgrayxj

Note from DJ
You need to look for a 7.5Amp fuse in the Fuse Panel marked TRANS; with the key in the ON position check both sides of that fuse for power for starters.

Also while you are checking that fuse take a flashlight and take a look at the push rod for the slave cylinder for your clutch; if it ever starts to leak it will drip onto the fuse panel and cause a lot of problems.

Please keep us posted to your progress.

cruiser54

This^^.

4.3L XJ

X2

mustwarnorcas

Ok I'll look into this tomorrow and report back on findings.

mustwarnorcas

Alright checked and replaced the trans fuse as well as cleaned the contacts with an electrical cleaner. Unfortunately a new fuse didn't help so I checked for power and I'm getting power on the top contact and not the bottom. Which is normal correct?

cruiser54

No. If electricity is passing through the fuse, both sides of the fuse should have power.

mustwarnorcas

Sorry I meant I didn't have the fuse in. I'll do it with the fuse in but I'm fairly certain I will get power to both contacts after I put in this new fuse.

DFlintstone

I might connect a meter between the switch and that bottom contact and check Ohm's/resistance while jiggling some wires, that might help find a bad spot. Just hazarding a guess those should be connected.

djgrayxj

Note from DJ
I’m glad you are keeping us posted as to your progress.
I asked you this question while you are checking that fuse take a flashlight and take a look at the push rod for the slave cylinder for your clutch; if it ever starts to leak it will drip onto the fuse panel and cause a lot of problems. You forgot to answer this question.

I also stated that you need to look for a 7.5Amp fuse in the Fuse Panel marked TRANS; with the key in the ON position check both sides of that fuse for power for starters.

I’m going to post a simple diagram of the path of the power down to your C279 connector on a black with a yellow tracer wire that is supposed to have power.

You will also see that the path for power goes into the C111 connector pin #A BLK/YEL wire on its way to C279 connector on the BLK/YEL wire; this is where you stated that you had no power. So we are trying to find out where you lost the path for the battery power.

Keeping us posted as to your progress.

mustwarnorcas

Thank you for that diagram! I took a look at below my clutch slave cylinder and I didn't see a fuse panel rather a bunch of wires connecting. However, nonetheless, I didn't see the slave cylinder leaking but I'll take another better look with a flashlight you stated. I did check the 7.5 trans amp and replace it along with cleaning the contacts. I'll keep you guys updated with what I find.

mustwarnorcas

Realized I was looking at the wrong thing lol. Will check again and report back as well as tracing out that diagram