left rear night running light dead 97 cherokee
 

when i turn my lights on at night all my lights work except my left rear running light the brakes even work on the same bulb , help ! the voltage at the the bulb holder is
ground 0.02 volt ? / low side 0.19 volt middle wire / high side 13.45 volt . the bulb is good and works fine on right side ?? :ohwell:::beerchug:

Re: left rear night running light dead 97 cherokee
 

I recently encountered a similar problem on an older Ford vehicle. I'm presuming that your bulb holder(socket) is the plastic type that twistlocks into the taillight assembly. As I said in one of my older Fords, the problem was in the socket itself, althougth it looked perfectly good, good color on the plastic,no sign or arcing- black/brown stains,Contact terminal ends clean, wiring soft and pliable.. However,the flat metal strips inside the socket housing were all corroded,where you cant see them.
you may not have the same issue, b ut again maybe you do. Don't assume the socket is good,just because it looks OK.
Let us know what you find.
Cheers,Ralph

Re: left rear night running light dead 97 cherokee
 

Thanks Ralph ill give it a try .. the socket dose look good and so do all the grounds . good place to start
thanks again . I will let know what happens .

Re: left rear night running light dead 97 cherokee
 

its not the socket i hocked up my little trailer and the night running lights are not working on it ether so the problem has to be forward in the cab . had a good look at the wires there are no breaks up to where the harness is encased then i noticed that the front left night running light also is not working so its the whole left side.my fuses seem to be ok ?? thanks again Ralph if you or any other forum members have any thoughts it would be appreciated ,, thanks..

Re: left rear night running light dead 97 cherokee
 

Hello all
What is the year make and model?
I ask because i have a line on electrical prints for almost all vehicles. Having said that are we able to post a pdf file to the forum.

Re: left rear night running light dead 97 cherokee
 

If we cannot post let me know and i will email the prints.
I can also help you interpret the drawings if need be.

Re: left rear night running light dead 97 cherokee
 

If we cannot post let me know and i will email the prints.
I can also help you interpret the drawings if need be.

Haha im a dumbass just noticed the year in the title

Re: left rear night running light dead 97 cherokee
 

I looked at the drawing for the 97 chrokee sport.
I looks to me like there may be a 10amp fuse blown.
The junction box its drawn in shows only one other fuse also 10 amps. The box shoild be connected directly to you headlight switch. Im guessing under the dash somewhere. But before crawling under the dash check to see of your license plate light is working. It share the same voltage supply as the left running light. If its out then start looking for the fuse.

Re: left rear night running light dead 97 cherokee
 

1997 Cherokee sport 4x4 4 liter 5 speed manual
thank you
im headed to my garage

Re: left rear night running light dead 97 cherokee
 

10 amp fuse ?? i can see my light switch ive removed the plastic and mettle plats under steering
right under the switch it looks like there is a large fuse white 1in x 1in rapped in foam ???

Re: left rear night running light dead 97 cherokee
 

I hope i did not moslead you to the fuses. I can only tell you what the prints say. Un fortunately they dont say where the devices are located. Under the dash is an educated guess. However i assure you that the prints do show a junction box woth 2 10 amp fuses in it. Id be glad to send you the drawing just send your email to me.
Untill then i will try to get an accuratelocation on the fuses. As for the white box you found sou.ds like a relay or something. If it opens easy have a look but dont force anythi.g

Re: left rear night running light dead 97 cherokee
 

Sam,

First, check and verify for certain if there is battery voltage on both sides of fuse F7 in the junction block. I don’t recall exactly where the JB is, but it’s most likely under the driver side of the dash. If you can’t find it, keep looking until you find a plastic block/box with a bunch of fuses in it, and look for F7. If the left license plate lamp is not operating with the head lamp switch ON, and both the left front and rear running lights are inoperative, fuse F7 is likely open. Fuses open because of excessive amperage, typically due to a short to ground.

Check for voltage on both sides of the fuse with the head lamp switch ON. This should be easy to check with a test lamp, but a volt meter will confirm that battery voltage is available. If the fuse is open, replace it with another 10A fuse. If it opens immediately, you have a short to ground somewhere in circuit L77 brown/yellow tracer to the front lamp, or the brown circuit to the rear, referring to the diagram.

You can isolate a short to ground by removing all other power from circuit L77 (remove fuse 7) and use the circuit to ground a powered test light. Referring to the diagram, you can begin disconnecting connectors moving toward the rear of the vehicle to verify if the test lamp turns off. If when you disconnect a certain connector, the test lamp stays on, your short to ground is between that connector and the last connector tested.

If you suspect there is an intermittent short to ground happening, you can install additional 5A fuses in line in different legs of the circuit further back in convenient areas. The next time a lamp (front, rear or license plate goes out, the short will be isolated downstream of the nearest open fuse.

Step 1: is finding the fuse and confirming if it is open or not. If it does have power on both sides, and both the front and rear lights have no power, your issue is likely right at the back of the junction block in connectors C2 and C7 in their respective pins for circuit L77.

Hope this helps and good luck!.

Re: left rear night running light dead 97 cherokee
 

I couldnt have said it better myself. Excellent explanation.
I agree with jeepcacares. Jeep how did you post the diagram. Also your diagram is much simpler to read

Re: left rear night running light dead 97 cherokee
 

Merci Serge!

Scroll to the bottom and you will see a tab that says "manage attachments"; go there and you'll be able to make your attachments.

Sam,

You also mentioned you hooked up your trailer to check the lights.
If the fuse is open and you replace it, and it only opens again when you re-connect your trailer, your trailer lights are either drawing too much amperage or there is a short in the trailer wiring.

Re: left rear night running light dead 97 cherokee
 

I guess ill have to use my desktop for that. The tab is not there when using my phone.
Thanks for the tip.
You seem to know about jeeps. Could you read my post in this category. Maybe you could point me in the right direction.

Re: left rear night running light dead 97 cherokee
 

sorry i have not gotten back to you sooner Serge ; you were right it was the number 7 10 amp fuse .
i was miss reading my glove box manual .. Thanks now the air in the spring and a new stereo sys. and
hopefully paint late summer and a new fly rod ..thanks again ..

Re: left rear night running light dead 97 cherokee
 

thanks .. i got her fixed it was a small fuse .. 10 amp no. 7 in cab fuse box:thumbsup: