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  #1  
Old July 4th, 2007, 13:47
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altierior altierior is offline
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brake lights not working

the mystery before the forum today is non-functioning brake lights on a 2000 XJ.
the facts:
  • all other lamps are operating normally.
  • there are no other electrical symptoms.
  • fuses # 7 & 23 are ok.
  • the brake-switch is ok as confirmed by testing continuity with an ohm meter per the fsm.
  • there is a custom swing-out tire carrier which has a brake light. this add-on light is not suspect because: a) it worked fine until recently, and b) the brake lights on the jeep do not work whether this extra brake light is connected or disconnected.
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Old July 4th, 2007, 14:12
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scoobyxj scoobyxj is offline
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Re: brake lights not working

You have confirmed that there is no voltage in the bulb sockets too?
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Old July 4th, 2007, 15:06
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Saudade Saudade is offline
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Re: brake lights not working

and confirm the grounds.
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Old July 4th, 2007, 15:31
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RTicUL8 RTicUL8 is offline
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Re: brake lights not working

If you have a trailer package then look at the wiring harness for a damaged cable.


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Old July 6th, 2007, 16:33
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altierior altierior is offline
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Re: brake lights not working

Quote:
Originally Posted by scoobyxj
You have confirmed that there is no voltage in the bulb sockets too?
i did after reading your post, and no voltage.

but i don't understand why i would check for voltage at the bulb socket, other than to rule out a bad bulb.
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Old July 6th, 2007, 17:03
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Saudade Saudade is offline
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Re: brake lights not working

Just part of the troubleshooting process. If you had voltage at the socket, then the ground would have been the prime suspect (assuming the bulb is good). Now you can start moving "upstream", checking for voltage at each junction. Since you tested for continuity at the switch already, check it for voltage as well.
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