Wiring Problem - JeepForum.com
Search  
Sign Up   Today's Posts
User: Pass: Remember?
Advertise Here
Jeep Home Jeep Forum Jeep Classifieds Jeep Registry JeepSpace Jeep Reviews Jeep Gallery Jeep Clubs Jeep Groups Jeep Videos Jeep Events Jeep Articles
Go Back JeepForum.com > Models > Jeep CJ Forum > Wiring Problem

Thanksgiving holiday sale in effect @ oconeeoffroad.comRugged Ridge 8500lb Winch w/ Steel Cable $294.99 Shipped O2" Lift Kits for JK, TJ, XJ, WJ~$125.00 w/free shippi

Reply
Unread 03-17-2008, 10:10 PM   #1
dave73
Registered User
1978 CJ5 
 
Join Date: Nov 2007
Location: vermont
Posts: 88
Wiring Problem

When i apply the brakes all of the lights on the jeep go on except the headlights, and my directionals dont work at all. Does anyone have any sugestions on where to start to try to fix the problem? Thanks!

dave73 is offline   Reply With Quote Quick reply to this message
Unread 03-17-2008, 10:23 PM   #2
flashawk
Registered User
1979 CJ5 
 
Join Date: Sep 2006
Location: Twain Harte, Ca.
Posts: 688
Start with the turn signal switch, most the lights on the Jeep go through the turn signal switch in the steering column. I say that because they don't work and you're going to have to fix those too.

You should be able to pick one up for about $30.00 plus all the specialty tools to tear down the column.
flashawk is offline   Reply With Quote Quick reply to this message
Unread 03-17-2008, 10:24 PM   #3
Project76
Registered User
1976 CJ5 
 
Join Date: Feb 2008
Location: Hawaii
Posts: 28
I would use this if you don't have it already...
__________________
1976 CJ5 Bone Stock (gone but not forgotten)
1973 C104 Jeep Commando (My Brothers)
1998 XJ Currently Stock
2009 F150 4x4 FX4 Screw
Project76 is offline   Reply With Quote Quick reply to this message
Unread 03-17-2008, 11:20 PM   #4
Fjguercio
Web Wheeler
1978 CJ7 
 
Join Date: Dec 2007
Location: Burnsville, MN
Posts: 2,814
Well.... sounds like you have a short some where.

Have you made any changes to the jeep recenlty??? What kind of electrical options do you have on the jeep.

I start with things that could have been changed, do you have a trailer hitch and electrical hook up for trailer. I GUESS someone put in trailer electrical and the trailer hook up is connected to the brake wire & running lights. The SECOND GUESS is the trailer plug is so rusted the brake light connectors has shorted out to the running lights.

The directionals not working could be another problem. Maybe the flasher modual is not working or the colum switch is broken. But since both the right/left do not work might be the flasher modual buy the fuse box.

Regards,
Fred
Fjguercio is offline   Reply With Quote Quick reply to this message
Unread 03-18-2008, 06:14 AM   #5
John Strenk
Moderator
 
John Strenk's Avatar
1976 CJ5 
 
Join Date: Feb 2005
Location: Shalersville Ohio
Posts: 13,190
All of the lights come on meaning dash lights as well or just the front parking.Turn signal lights?
Turn signal indicators also come on when you step on the brake?

It's kind of important as this could point to a short, bad/stuck switch, or bad ground...
John Strenk is online now   Reply With Quote Quick reply to this message
Unread 03-18-2008, 11:28 AM   #6
Mike Romain
Registered User
1986 CJ7 
 
Join Date: Nov 2007
Location: Off the Grid in Chester Grant, Nova Scotia, Canada
Posts: 13,789
Quote:
Originally Posted by dave73 View Post
When i apply the brakes all of the lights on the jeep go on except the headlights, and my directionals dont work at all. Does anyone have any sugestions on where to start to try to fix the problem? Thanks!
A bad bulb in the brake lights can cause this with ground theft. It can short to the running lights so they all turn on. The glass can come loose from the socket. I would check them first.

A bad ground in the back fixtures also can cause this, The fixture bolts are the ground and when they get rusty or moved by something like wire cages, the ground can be lost so the brake lights steal it through the running lights and their separate harness ground.
__________________
Mike
86/00 CJ7 Laredo, 33x9.5 BFG AT's, 'glass nose to tail in '00, 'New' frame,wires and plumbing in '09. Carter BBD Carbed 4.0 HO in '10.
89 YJ Renegade. BBD Carbed 4.0 HO. Locked front and rear with 33x9.5 BFG AT's
Some Canadian Bush Jeep Runs and Build Photos: http://mikeromainjeeptrips.shutterfly.com (10 new albums added Sept 16/10)
Mike Romain is offline   Reply With Quote Quick reply to this message
Unread 03-18-2008, 11:33 AM   #7
81Sparky
Registered User
1994 YJ Wrangler 
 
Join Date: Mar 2008
Location: Sac, CA
Posts: 175
I wish I could help you Dave!! But my wiring looks like this at the moment. LoL...-Sparky-
__________________
uuuuuhhhhh...OK!
81Sparky is offline   Reply With Quote Quick reply to this message
Unread 03-18-2008, 11:36 AM   #8
John Strenk
Moderator
 
John Strenk's Avatar
1976 CJ5 
 
Join Date: Feb 2005
Location: Shalersville Ohio
Posts: 13,190
Quote:
Originally Posted by 81Sparky View Post
I wish I could help you Dave!! But my wiring looks like this at the moment. LoL...-Sparky-


WHAT HAPPENED?
John Strenk is online now   Reply With Quote Quick reply to this message
Unread 03-18-2008, 02:57 PM   #9
Fjguercio
Web Wheeler
1978 CJ7 
 
Join Date: Dec 2007
Location: Burnsville, MN
Posts: 2,814
SPARKY,

I bet you have a few shorts also.

SORRY about your loss.

Fred
Fjguercio is offline   Reply With Quote Quick reply to this message
Unread 03-18-2008, 03:38 PM   #10
81Sparky
Registered User
1994 YJ Wrangler 
 
Join Date: Mar 2008
Location: Sac, CA
Posts: 175
Your right Fred but mostly between the ears LOL No loss I bought it this way!!
__________________
uuuuuhhhhh...OK!
81Sparky is offline   Reply With Quote Quick reply to this message
Unread 03-18-2008, 10:11 PM   #11
dave73
Registered User
1978 CJ5 
 
Join Date: Nov 2007
Location: vermont
Posts: 88
Thanks for all the great replies. I am going to try to tackle this tomarrow with a buddy of mine if i can get some free time. I bought the jeep in October (at a very nice price i might add) Drove it 2 hrs. to my house and parked it for the winter. Their is no trailer harness, and the directional indicators on the speedo also come on as well ad all other lights except the headlights. I think first i will get a new flasher module, and then check all the bulbs. Thanks again! Dave
dave73 is offline   Reply With Quote Quick reply to this message
Unread 04-12-2008, 10:58 PM   #12
dave73
Registered User
1978 CJ5 
 
Join Date: Nov 2007
Location: vermont
Posts: 88
Wiring problem HELP!!

I just got done trying to figure out my light problems, an here is where i am at, please keep in mind i am an EXTREME amatuer at this.

1. should the wire colors from the turn signal switch, and the wiring colors on the plug that you plug itno each other br the same colors on each side.....mine arent (i would assume they should) this leads me to believe that i have the wrong directional switch for the jeep. at this time no turn signals or flashers work

2. all light sockets are grounded with proper working bulbs. I tested the fuse box with the test light. with the fuse in the box i get no lite when i hit the brake, without the fuse in the box i get a strong light when i hit the brake. is this correct? am i doing it wrong?

Any help ideas i can get from you guys is greatly appreciated. Dave
dave73 is offline   Reply With Quote Quick reply to this message
Unread 04-13-2008, 10:31 AM   #13
Mike Romain
Registered User
1986 CJ7 
 
Join Date: Nov 2007
Location: Off the Grid in Chester Grant, Nova Scotia, Canada
Posts: 13,789
Quote:
Originally Posted by dave73 View Post
I just got done trying to figure out my light problems, an here is where i am at, please keep in mind i am an EXTREME amatuer at this.

1. should the wire colors from the turn signal switch, and the wiring colors on the plug that you plug itno each other br the same colors on each side.....mine arent (i would assume they should) this leads me to believe that i have the wrong directional switch for the jeep. at this time no turn signals or flashers work

2. all light sockets are grounded with proper working bulbs. I tested the fuse box with the test light. with the fuse in the box i get no lite when i hit the brake, without the fuse in the box i get a strong light when i hit the brake. is this correct? am i doing it wrong?

Any help ideas i can get from you guys is greatly appreciated. Dave
Wire colours in Jeeps change at the plugs very often. The brake light power has to go through it, so that much was right.

Your power to the fuse box is correct from the sounds of it, but you knew this because the lights actually light up right.

Have you pulled the signal flasher out to see if one of it's legs has rotted off? That is more common than one would think and happened to both our Jeeps. Both flashers were rotted out in my 86 CJ7, my emergency flasher is still dead because the socket for the flasher dissolved.

You should have two flashers under there, one for signals and one for emergency lights which once again points to no ground when both don't work and the brakes sort of do.

If your bulbs are good, then your rear fixtures may not have a ground. Has anyone put cages on them or anything like that? That is a common failure cause. Just to verify this one I normally run a booster cable from the battery negative and clamp it onto the rear fixture to see what happens. If the signal starts working on that side or the front one side doesn't light up with the brakes, bingo.
__________________
Mike
86/00 CJ7 Laredo, 33x9.5 BFG AT's, 'glass nose to tail in '00, 'New' frame,wires and plumbing in '09. Carter BBD Carbed 4.0 HO in '10.
89 YJ Renegade. BBD Carbed 4.0 HO. Locked front and rear with 33x9.5 BFG AT's
Some Canadian Bush Jeep Runs and Build Photos: http://mikeromainjeeptrips.shutterfly.com (10 new albums added Sept 16/10)
Mike Romain is offline   Reply With Quote Quick reply to this message
Unread 04-18-2008, 09:03 PM   #14
dave73
Registered User
1978 CJ5 
 
Join Date: Nov 2007
Location: vermont
Posts: 88
I just unhooked the turn signal swithch to see what lights work when it is unplugged. obviously the directionals dont work, but all running lights work correctly, in which they didnt when it was plugged in. and there are no brake lights. As an extreme novice in this field if elecrical vehicle problems, do you think the culprit id the turn signal swithch? I planned on changing it out anyway, just waiting to borrow a steering wheel puller from a friend...or should i bother if it is something else? Thanks for all the great help, the warm weather is here so i can start digging in. Dave
dave73 is offline   Reply With Quote Quick reply to this message
Unread 04-19-2008, 09:59 AM   #15
Mike Romain
Registered User
1986 CJ7 
 
Join Date: Nov 2007
Location: Off the Grid in Chester Grant, Nova Scotia, Canada
Posts: 13,789
Quote:
Originally Posted by dave73 View Post
I just unhooked the turn signal swithch to see what lights work when it is unplugged. obviously the directionals dont work, but all running lights work correctly, in which they didnt when it was plugged in. and there are no brake lights. As an extreme novice in this field if elecrical vehicle problems, do you think the culprit id the turn signal swithch? I planned on changing it out anyway, just waiting to borrow a steering wheel puller from a friend...or should i bother if it is something else? Thanks for all the great help, the warm weather is here so i can start digging in. Dave
Your brake light circuit runs 'through' the signal light switch. It appears to be behaving properly.

Have you tried the booster cable ground for the rear fixtures?

Your original posts is still screaming no back fixture ground. That or a dead short 'behind' the glass on one of the brake light bulbs is the only way I have seen 'all' the lights come on with the brakes.

Those 1157 bulbs fail in the strangest ways, the glass can come loose which will cause your symptoms or even the brake light filament can fry and drop down onto the running light filament causing your symptoms.

The last thing I would do would be to pull the steering apart, that is not some place the brake lights can short to the running lights because the running light power doesn't go anyplace near there. Hey it could be a melted blob so all the signals are shorting to the brakes, but...

Have you tried cycling the emergency flashers? All the power goes through there too.
__________________
Mike
86/00 CJ7 Laredo, 33x9.5 BFG AT's, 'glass nose to tail in '00, 'New' frame,wires and plumbing in '09. Carter BBD Carbed 4.0 HO in '10.
89 YJ Renegade. BBD Carbed 4.0 HO. Locked front and rear with 33x9.5 BFG AT's
Some Canadian Bush Jeep Runs and Build Photos: http://mikeromainjeeptrips.shutterfly.com (10 new albums added Sept 16/10)
Mike Romain is offline   Reply With Quote Quick reply to this message
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the JeepForum.com 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 e-mail address for yourself.
Note: All free e-mails have been banned due to mis-use. (Yahoo, Gmail, Hotmail, etc.)
Don't have a non-free e-mail address? Click here for a solution: Manual Account Creation
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


Suggested Threads





Jeep, Wrangler, Cherokee, Grand Cherokee, and other models are copyrighted and trademarked to Jeep/Chrysler Corporation. JeepForum.com is not in any way associated with Jeep or the Chrysler Corp.