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Jeep Wrangler YJ
YJ General Discussion
Strange LED Blinker Behavior
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<blockquote data-quote="machoheadgames" data-source="post: 433645" data-attributes="member: 18789"><p>No, the issue is that the side markers are a single filament (aka 2 wire, 1 brightness). The only way you can rewire them that simply would be to wire the side markers straight to the parking lamp or the turn signal circuit and forego the other function. </p><p></p><p>The way it works in stock form is one wire from the parking lamps and one wire from the turn signal circuit goes to the bulb. When headlights are off, the bulb gets power from the turn signal when it’s on and it grounds through the parking lamp wire by traveling through the front bulb to ground. Side marker blinks with the front in that case. </p><p></p><p>When headlights are turned on, the side markers get power from the parking lamps, and the side marker bulbs seek ground through the turn signal filament of the front bulbs instead. When you have the headlights on and turn on the turn signals, the side markers see 12V on both wires and end up going out, which creates a backwards blinking where they alternate blinking with the front because they are basically losing ground when the turn signal starts going. </p><p></p><p>The way to rewire the side markers is to convert them to an artificial 3 wire setup. You put a diode on each of the two wires going to the bulb, put a 1 watt resistor on the parking lamp wire (300-500ohms is usually decent) which dims the bulb on running lamp mode. You then splice those two wires to one wire going to the side marker socket. The diodes keep them from backfeeding each other. Then you run the second wire to just ground.</p><p></p><p>Essentially doing this operates the 2 wire single brightness bulb as a 3 wire with a full brightness mode for turn signals and an artificially dimmed brightness on normal parking lamp mode. When headlights are off, you’ll just see the blink on-off-on-off at full brightness, and then when you turn the headlights on, you’ll see the blinker go bright-dim-bright-dim etc. </p><p></p><p>Here’s a vid of mine after doing the mod. Here is a link to a good write up for it as well. Same deal on TJ’s so the work is the same on a YJ as well. Well worth it in my mind, I’ll never have an incandescent bulb YJ again. Except in the dash where I like them.</p><p></p><p><a href="https://wranglertjforum.com/threads/using-leds-in-the-front-fender-side-markers-on-a-jeep-wrangler-tj.32114/" target="_blank">LED turn signal mod</a></p></blockquote><p></p>
[QUOTE="machoheadgames, post: 433645, member: 18789"] No, the issue is that the side markers are a single filament (aka 2 wire, 1 brightness). The only way you can rewire them that simply would be to wire the side markers straight to the parking lamp or the turn signal circuit and forego the other function. The way it works in stock form is one wire from the parking lamps and one wire from the turn signal circuit goes to the bulb. When headlights are off, the bulb gets power from the turn signal when it’s on and it grounds through the parking lamp wire by traveling through the front bulb to ground. Side marker blinks with the front in that case. When headlights are turned on, the side markers get power from the parking lamps, and the side marker bulbs seek ground through the turn signal filament of the front bulbs instead. When you have the headlights on and turn on the turn signals, the side markers see 12V on both wires and end up going out, which creates a backwards blinking where they alternate blinking with the front because they are basically losing ground when the turn signal starts going. The way to rewire the side markers is to convert them to an artificial 3 wire setup. You put a diode on each of the two wires going to the bulb, put a 1 watt resistor on the parking lamp wire (300-500ohms is usually decent) which dims the bulb on running lamp mode. You then splice those two wires to one wire going to the side marker socket. The diodes keep them from backfeeding each other. Then you run the second wire to just ground. Essentially doing this operates the 2 wire single brightness bulb as a 3 wire with a full brightness mode for turn signals and an artificially dimmed brightness on normal parking lamp mode. When headlights are off, you’ll just see the blink on-off-on-off at full brightness, and then when you turn the headlights on, you’ll see the blinker go bright-dim-bright-dim etc. Here’s a vid of mine after doing the mod. Here is a link to a good write up for it as well. Same deal on TJ’s so the work is the same on a YJ as well. Well worth it in my mind, I’ll never have an incandescent bulb YJ again. Except in the dash where I like them. [URL='https://wranglertjforum.com/threads/using-leds-in-the-front-fender-side-markers-on-a-jeep-wrangler-tj.32114/']LED turn signal mod[/URL] [/QUOTE]
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Jeep Wrangler YJ
YJ General Discussion
Strange LED Blinker Behavior
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