TJ Brake Light Switch Install Write-Up - JeepForum.com
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Unread 10-12-2011, 05:23 PM   #1
djflyy
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TJ Brake Light Switch Install Write-Up

Greetings -

Time for another short write up, this time discussing a less commonly discussed problem with the brake lights not activating! If you've experienced this, you've noticed that your brake lights aren't working. If the bulbs check out fine, and the fuse is fine, then it's time to replace the brake light switch. First off, if you're checking those prior things, the fuse for the brake lights is fuse #2, located 2nd from the top on the far right of the fuse box. There's a photo below detailing where this is for those that don't know.

Now, onto the very simple swap of TJ brake light switches. There are two ways to go about this.... removing the dashboard under the steering wheel for good access, or just breaking your back in half and twisting into the floorboards of the driver's side. I chose the latter of the two.

Above the brake pedal, you'll see a plastic block with a black pin that is pushed against the pedal arm. There will be a wiring harness attached to this block. Start by removing the harness, it's got two clips on it so I used some pliers to gently pry back the plastic to allow it to slide out. Once it's out, you'll need to remove the plastic block by turning it and freeing it from it's mount. It's really as simply as a twist, so give it some love and pull that sucker out. Then just reverse the process for the new one to go back in. I had to push rather hard and then twist the new block in for it to stay. Then re-connect the harness and you're good to go!

As far as where to get the switch, I managed to get the only one that my AutoZone had in stock, for only $9.99. It was called a "TruGrade Stoplight Switch" and is part No. CR4834TG by the manufacturer, and #966621 according to my AutoZone receipt.

Again, be sure to check the fuse and bulbs first. As always, comments and thoughts are welcome.

Photos:


Location/removal:




Old vs. New:




New block in:




Harness re-attached:




Fuse block brake light location:






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Unread 06-20-2012, 11:02 PM   #2
or99tj
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It is good to know that you can adjust the length of the plunger.
Just put the original and the replacement switches side by side to compare plunger lengths. Then push in or pull out the replacement's plunger to match the length of the original
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Unread 09-29-2012, 06:02 AM   #3
mrblaine
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Quote:
Originally Posted by or99tj View Post
It is good to know that you can adjust the length of the plunger.
Just put the original and the replacement switches side by side to compare plunger lengths. Then push in or pull out the replacement's plunger to match the length of the original
You don't or shouldn't match the length of the original. Reason is that they both may not have the same internal switch turn on point.

The best thing to do is depress the brake pedal slightly and pull the plunger out as far as possible and then release the pedal. It will adjust the plunger to the correct length.
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Unread 09-29-2012, 08:39 AM   #4
Skyryder
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/\ Ya what he says. The switches are self adjusting. Pulling plunger out will will reset so the first "brake" action will set the switch. I'm sure many switches have been needlessly replaced when a reset was all that is needed, as this was the case with mine.
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