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Only one brake light working.

Discussion in 'Early CJ5 and CJ6 Tech' started by gtolosa, Jul 24, 2006.

  1. Jul 24, 2006
    gtolosa

    gtolosa New Member

    San Clemente, Ca.
    Joined:
    Dec 2, 2004
    Messages:
    31
    I did some searching in the knowledgebase, but did not find the info. I am after.

    68, cj5, dual brake switches, 225.

    Issue: When I press the brakes, only the pass. brake light works. Turn signals work fine, so it's not the bulb.
    Both brake switches are hot.

    What may be the issue?
     
    gtolosa, Jul 24, 2006
    #1
  2. Jul 24, 2006
    66cj5

    66cj5 Jeep with no name

    NorthWest Indiana
    Joined:
    Sep 10, 2003
    Messages:
    2,084

    Unless you have 4 lights (ala corrvete), you have combo turn/tail/brake lights. the brake lights have a seperate filiment. simple fix is to switch the sides to see if they light up.
     
    66cj5, Jul 24, 2006
    #2
  3. Jul 24, 2006
    sparky

    sparky Sandgroper Staff Member Founder

    Perth, WA
    Joined:
    Sep 20, 2002
    Messages:
    9,221
    Turn signal filament is the same filament as the brake filament. If the turn signals work I'd say it's not the bulb but the wiring.
     
    sparky, Jul 24, 2006
    #3
  4. Jul 24, 2006
    gtolosa

    gtolosa New Member

    San Clemente, Ca.
    Joined:
    Dec 2, 2004
    Messages:
    31
    Right. It's not the bulb, since the directionals work. Just looking for help/advise on what/where to look in terms of the wiring.
     
    gtolosa, Jul 24, 2006
    #4
  5. Jul 24, 2006
    jpflat2a

    jpflat2a what's that noise?

    Hermosa, SD
    Joined:
    Jul 30, 2003
    Messages:
    8,525
    I believe the brakes feed thru the turn signal switch, as the turn cancels the brake
    maybe check/clean the switch wiring/connectors at the switch ?
     
    jpflat2a, Jul 24, 2006
    #5
  6. Jul 24, 2006
    dohc281

    dohc281 It is what it is.

    Laurel Springs, N.J.
    Joined:
    Dec 30, 2004
    Messages:
    605
    I had the same problem with mine when I first bought it. I got underneath and saw lamp cord in the wiring and bought a new harness and just put it in. It was well worth the expense and trouble.
     
    dohc281, Jul 24, 2006
    #6
  7. Jul 24, 2006
    Jeeper Preacher

    Jeeper Preacher My Little Grill Girls

    Wilmington, NC
    Joined:
    Feb 18, 2006
    Messages:
    109
    I have the same problem right now. It is pretty low on the priority list, but I have researched this site pretty well on the issue and I would guarantee it is a bad ground. I think for this, I am going to have to go through my brake lights and make sure the mounts are are grounded well against the metal. Actually, all the lights will need to be checked for proper grounding. Hope this helps!
     
    Jeeper Preacher, Jul 24, 2006
    #7
  8. Jul 24, 2006
    Steamer

    Steamer Thick and gritty!

    SW OR
    Joined:
    Oct 17, 2004
    Messages:
    389
    Turn signal switch. Deep inside. Not hard to do, but watch for little springs and things.
     
    Steamer, Jul 24, 2006
    #8
  9. Jul 24, 2006
    russo

    russo Hope is not a method

    Norris, Tennessee
    Joined:
    Oct 28, 2005
    Messages:
    498
    Had a similar problem a few weeks ago with my front turn signal/parking light. Good parking light - no turn signal. Cleaned the connections - GtoG.
     
    russo, Jul 24, 2006
    #9
  10. Jul 24, 2006
    w3srl

    w3srl All-around swell dude Staff Member

    Port Orange, FL
    Joined:
    Nov 6, 2002
    Messages:
    4,275
    I vote for the TS switch also. Both TS work, so it most likely is not a ground.
     
    w3srl, Jul 24, 2006
    #10
  11. Jul 24, 2006
    Bucket of Bolts

    Bucket of Bolts Broke Member

    Dinuba, Ca.
    Joined:
    Jun 3, 2006
    Messages:
    60
    TS Switch. It "interrupts the voltage going to the brake lights when your foot is on the brake pedal. It your case, it sounds like it permanently interrupted it. I think???
     
    Bucket of Bolts, Jul 24, 2006
    #11
  12. Jul 24, 2006
    robbieyukon

    robbieyukon New Member

    central MD
    Joined:
    Apr 21, 2006
    Messages:
    38
    i had the same problem. i cleaned all the connections with wd40. works awesome now.
     
    robbieyukon, Jul 24, 2006
    #12
  13. Jul 24, 2006
    kamel

    kamel Senior Curmudgeon

    Erlanger, Kentucky
    Joined:
    Jun 10, 2003
    Messages:
    891
    I think that the turn signal switch is the most likely culprit.

    I wouldn't use WD40 on it, but I'd get a contact cleaner from Radio Shack (if they haven't gone bankrupt yet) or an electrical supply house.
     
    kamel, Jul 24, 2006
    #13
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