Brake lights won't go on - Jeep Wrangler Forum
Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > YJ Jeep Wrangler Forum > YJ Tech Forum

Join Wrangler Forum Today


Reply
 
Thread Tools

Please support our sponsors and let them know you heard about them on WranglerForum.com
Old 03-21-2011, 11:33 AM   #1
Jeeper
 
Join Date: Apr 2010
Posts: 22
Brake lights won't go on

I have an '87, Manual Trans, 4.2l. I have all my lights functional with exception of the brake lights. I have been unable to locate the switch at the brake pedal, thinking that may be the problem. Any suggestions? I'm a bit stuck at the moment.

waif69 is offline   Quote Quick Reply
Old 03-21-2011, 01:16 PM   #2
Jeeper
 
Tyewilly's Avatar
 
Join Date: Dec 2010
Posts: 551
Here are a couple pics of the brake light switch(black box looking thing) on my '95. The firewall is to the right. Don't forget to check your fuses if you haven't already. The turn signal switch is also part if the brake light circuit for the left and right lights, but the center comes straight off the brake light switch. Good luck!
Attached Thumbnails
Click image for larger version

Name:	ForumRunner_20110321_121155.jpg
Views:	50
Size:	77.9 KB
ID:	42164   Click image for larger version

Name:	ForumRunner_20110321_131243.jpg
Views:	51
Size:	78.0 KB
ID:	42165  


Tyewilly is offline   Quote Quick Reply
Old 03-21-2011, 03:29 PM   #3
Jeeper
 
Undead-89's Avatar
 
Join Date: Feb 2011
Location: Loveland, CO
Posts: 760
That is different than my 89. Mine is directly on top of the pedal mount with a double blade connector on top. And the whole assemble moves a bit when you push the pedal in. Sometimes it moves away and turns off while I am sitting at a light.
Undead-89 is offline   Quote Quick Reply
Old 03-21-2011, 03:43 PM   #4
Jeeper
 
Undead-89's Avatar
 
Join Date: Feb 2011
Location: Loveland, CO
Posts: 760
According to my Chiltons drawing, the 87:

Starts at the fusible link which is shared by all the lights that will come on with the key off.

It then goes to Fuse 3 which is shared with the Hazard lights, but not the turn signal.

A pink and black wire goes from there to the Brake pedal switch.

A Lt Blu/Blk wire goes from there to the column harness connector.

A white wire goes from there to the turn signal switch.

The turn signal switch will use, the Hazard input, the brake input or the turn signal input to illuminate the rear bulbs.

Troubleshooting:
Your headlights work so the fusible link is fine.

Your turn signals work, so everything from the turn signal switch in the column to the rear lights should be fine.

Try your Hazards. If they don't work, check Fuse 3.

If your Hazards work, then all that is left is:
(in order of my opinion of probability)
1. the connector on the brake switch could be loose
2. the brake switch is loose and moves away from the pedal, or even fell off
3. the switch itself went bad
4. the wire has been pinched or cut before or after the switch
5. the wiring harness on the column could be loose (this would usually show in other systems also so not as probable unless that wire is the end wire on the connector)
Undead-89 is offline   Quote Quick Reply
Old 03-21-2011, 07:31 PM   #5
Jeeper
 
Join Date: Apr 2010
Posts: 22
Thanks for the info. I hope to look at it tomorrow after work, if it is warm and still light out, that is. It's tough getting a jeep on the road when you only get a few hrs per weekend to work on it. :-(
waif69 is offline   Quote Quick Reply
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Jeep Wrangler Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
No Brake Lights gotpepsi TJ Tech Forum 0 12-28-2010 05:04 PM
Signal and brake lights just quit working fullboar01 YJ General Discussion Forum 6 03-14-2010 11:58 PM
All three brake lights are out??? vfrpilot TJ Tech Forum 4 09-07-2008 01:41 AM
Brake dummy lights PC-Chris TJ Tech Forum 4 07-25-2008 05:56 PM
Turn signals went out...now my brake lights dont work? Kartik TJ Tech Forum 3 12-17-2007 04:50 PM



Download our Mobile App

» Network Links
»Jeep Parts
» Featured Product

All times are GMT -5. The time now is 02:31 PM.



Jeep®, Wrangler, Liberty, Wagoneer, Cherokee, and Grand Cherokee are copyrighted and trademarked to Chrysler Motors LLC.
Wranglerforum.com is not in any way associated with the Chrysler Motors LLC