[HOW-TO] "4-HI" brake light mod (EASY method!) (STOCK TAILS)

95C1500 said:

mine is a Rampage. $45 and a 3 year warranty... I'm happy with it

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Now look at the top bulb. You will notice that i wrote "BRIDGE" for the ground contacts. The circuit board does not have a ground for the "High filament", so what i did was take a SMALL strand of bare wire (think 1cm at the most, you don't want to touch another contact point) and thread it through the "contact rods" on the ground end of the bulb by wrapping it around the base. This is NECESSARY. Then carefully install the "High filament" wire in the designated spot, and install the bulb.

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AirmanSkee said:

Pictures are both with brakes and tails on, drivers side has 4hi mod accomplished, passenger is stock.

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Also, I noticed the bulb for the reverse light is a double filament bulb too, but only one lights up... I'm considering doing this mod to it as well, so both light up when put in reverse.

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1997k1500Calvin said:

Where did you get you're leds? Any pics? And are the reverse lights leds and if so how much brighter are they

Tapatapatalk

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88GMCtruck said:

What have you seen? I'll have to get pictures of my setup, I have posted pictures of the gmt800 sockets before.

The oem circuit boards fail from the additional heat. The 88-89 ones are way worse, but the newer ones do it to. Not everyone has the problem, but there is a reason you can go to the parts store and buy the circuit board in the "help!" section.

Out of my two gmt400 vehicles I had problems with both. My best friend had problems with his as well. Neither my 99 or my buddy's 98 were molded. The way the boards are designed they can intermittently fail over time, from what I think is heat.

That is why I do not think it's a good idea to not mod them this way.

Sent from my big block powered HTC gas guzzler.

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