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brakes wont change when pedal is pressed

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Old 07-27-2012, 04:32 PM
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Default brakes wont change when pedal is pressed

I got an 88 4.0 cherokee. With no brake lights.. I've replaced the bulbs, the brake switch under the pedal.. still won't light up the second filiment in the bulb. Turn my parking lights on and they light up the first filiments. I dont no a lot about electrical issues, but if someone knows something I don't please let me know.. I don't wana get my xj rear ended
Old 07-27-2012, 04:36 PM
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Is the switch adjusted correctly?
Old 07-27-2012, 05:42 PM
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How do I adjust it? I just put in a new one. Sorry for my ignorance I'm a boat builder. Not a mechanic Haha.
Old 07-27-2012, 05:45 PM
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And sorry so long to reply. been out messing with it. I also have no low beams.. replaced the head lights today as well and still nothing. High beams work great. And all my parking lights, blinkers, tail lights, reverse lights all work. Going crazy..
Old 07-27-2012, 05:53 PM
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Do u think those two problems are related?
Old 07-27-2012, 05:55 PM
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The brake light switch should be pressed in by the brake pedal when the brakes are not applied.
When you apply the brakes the plunger comes out & grounds out the switch,thus activating the brake lights.

No, check to make sure you have power to the low beam side.How,I have no FUKING clue.
Old 07-27-2012, 06:03 PM
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Its bolted threw my brake pedal. Doesnt seem to depress or anything from Wat I can see. The switch its self moves with the pedal. I put it on just like it was.
If I had the wrong wires hooked up to it wouldn't it fry a fuse? I haven't blown one at all
Old 07-27-2012, 06:07 PM
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Have you replaced the bulb in the third brake light? Does it work?
Old 07-27-2012, 09:03 PM
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Is that the one that actually lights up as my breaks? Bc I figured it was the top one with two filiments in it. Bc the third one just has one. Let me go look... Haha. They were all working when I had it off earlyer.
Old 07-27-2012, 09:07 PM
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88 xj has no adjustment for switch and no third brake light have you checked for 12volts at fuse both sides?
Old 07-27-2012, 09:13 PM
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The third bulb goes to my blinker. And its a two filiment bulb. Is that corect? Thanks again for peoples feed back
Old 07-27-2012, 09:16 PM
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I gata find my tester.. how would I go about doing that? Check it at the bulb and then wear. Right at the fuse?
Old 07-27-2012, 09:21 PM
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Originally Posted by jacob Harrington
I gata find my tester.. how would I go about doing that? Check it at the bulb and then wear. Right at the fuse?
have you pulled fuse and looooked at it?
Old 07-28-2012, 01:19 AM
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Yea I replaced all of em. There perfect.
Old 07-28-2012, 05:00 AM
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Originally Posted by jacob Harrington
Yea I replaced all of em. There perfect.
check for current yet ?


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