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2004 Jeep Wrangler blinker issue?
Just recently purchased new fender flares from Bushwhacker for my '04 Wrangler Sport. During installation, the instructions called for cutting the factory side blinker from its wires so that an included LED side blinker may be installed in it's place. The instructions advise crimping included male wire connectors to the factory wires cut from original side blinker light. Next step was to crimp female wire connectors to the LED blinker light wires so that it could be connected directly to factory wiring.
After installing everything per included instructions, tested the blinkers and the side LED's worked fine. Later that night, i noticed when i turned on the parking lights the LED side blinker lights were not on, nor did they blink when signaling left or right. Was curious as to why the blinkers would work with the parking lights/head lights off but would be inoperable while they were on?
LEDs will only light when electricity flows through them in the correct direction. To use LEDs in the repeaters you need to use ones with in built rectifiers or build your own bridge rectifiers using diodes which must be spliced into the wiring near the fender.
The flare mounted repeaters are not conventionally wired. They do not have normal positive and ground wires. The bulbs are wired to two positive feed circuits. When the lights are off and the indicators flash on the lamps illuminate because they are being grounded through the lighting circuit. When the lights are on and the indicators are off they light because they are grounding through the indicator circuit. When the indicators flash on the repeater lamps then have two positives so no current flows through them and they go off. That's what causes the wig-wag effect when the lights are on.
I have LEDs in the side markers of my 97 TJ, and had to build my own bridge rectifier circuit so they would work as the bulbs would. I can't find the post I made on http://www.jeepforum.com about this but here's the diagram which I still have hosted. Top is a bulb that will light with current going either way. Bottom is an LED which uses diodes to allow current to come from either direction but still pass through the diode in the correct direction to make it light. Here's the pic...
http://farm4.static.flickr.com/3206/2839754396_195f154dbc_o.jpg
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