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Jeep Wrangler YJ
YJ General Discussion
91 Sahara euro tail light conversion
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<blockquote data-quote="machoheadgames" data-source="post: 437117" data-attributes="member: 18789"><p>Sounds like the cons i mentioned are not a problem for you, so you’re free to dive in. </p><p></p><p>Yes, you can splice into the brake lamp switch wiring itself since it actually has a pigtail. I’m not afraid to dig into factory wiring but it’s better if it can be avoided. </p><p></p><p>As far as I’m aware, maybe 91 is different, but 94 and 95 the wiring for the brake light switch is black, white/pink, white/tan, and pink/blue. Pink and blue is the battery power to the switch, white/tan is the output to the brake lights. Black is ground, white/pink is a brake sense for the PCM. When NOT using the brakes, the brake sense wire is connected to ground. When you hit the brakes, the PCM no longer sees ground on that circuit and knows you’re using the brakes. I don’t know what function that plays in real world usage of running the engine but it’s there. </p><p></p><p>You can do it your method or at the brake switch itself. The main thing is you cut the brake light output before it goes to the steering column, and extend it from where you cut it. Heat shrink the cut wire running to the steering column. You can make your cut in the brake light switch if you have enough access to work in there, or you can snip it closer to the column. Your call. Either way, the cut portion that is not extended, I’d heat shrink it and tape it up to the harness. The heat shrink can always be removed and it be respliced later.</p></blockquote><p></p>
[QUOTE="machoheadgames, post: 437117, member: 18789"] Sounds like the cons i mentioned are not a problem for you, so you’re free to dive in. Yes, you can splice into the brake lamp switch wiring itself since it actually has a pigtail. I’m not afraid to dig into factory wiring but it’s better if it can be avoided. As far as I’m aware, maybe 91 is different, but 94 and 95 the wiring for the brake light switch is black, white/pink, white/tan, and pink/blue. Pink and blue is the battery power to the switch, white/tan is the output to the brake lights. Black is ground, white/pink is a brake sense for the PCM. When NOT using the brakes, the brake sense wire is connected to ground. When you hit the brakes, the PCM no longer sees ground on that circuit and knows you’re using the brakes. I don’t know what function that plays in real world usage of running the engine but it’s there. You can do it your method or at the brake switch itself. The main thing is you cut the brake light output before it goes to the steering column, and extend it from where you cut it. Heat shrink the cut wire running to the steering column. You can make your cut in the brake light switch if you have enough access to work in there, or you can snip it closer to the column. Your call. Either way, the cut portion that is not extended, I’d heat shrink it and tape it up to the harness. The heat shrink can always be removed and it be respliced later. [/QUOTE]
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Jeep Wrangler YJ
YJ General Discussion
91 Sahara euro tail light conversion
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