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DIY headlight wiring harness upgrade for low $$

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Old 11-20-2010, 05:41 AM
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my bad lol well how do I avoid that?
Old 11-20-2010, 05:50 AM
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irab88 narrowed the problem down to something with the HB indicator light using the low beam wiring and to use a high watt resister parallel to the LB relay, that's all I Know, I haven't done it, I like the idea of the low beam staying on with the high beam. I don't remember if iamsuperbleeder's setup had the LB's on with the HB's or not.
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Old 11-20-2010, 06:37 AM
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hmmmm time to bust out my multimeter and check some stuff
Old 11-20-2010, 07:03 AM
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Originally Posted by PirateMcgee
hmmmm time to bust out my multimeter and check some stuff
also get your haynes. that's what i used to troubleshoot the headlight circuit. if you use your dmm, test the resistance of the low beam and the relay coil. let us know what you find! i'm interested...
Old 11-20-2010, 07:17 AM
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sorry guys, been moving and the computer's been taken apart for the last two days everyone figure their issues out?
Old 11-20-2010, 08:58 AM
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Originally Posted by iamsuperbleeder
sorry guys, been moving and the computer's been taken apart for the last two days everyone figure their issues out?
nope lol, oh well low beams until hids
Old 11-20-2010, 09:44 AM
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Originally Posted by iamsuperbleeder
sorry guys, been moving and the computer's been taken apart for the last two days everyone figure their issues out?
did your low beams stay on with your highs with your wiring?
Old 11-20-2010, 11:25 AM
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how come your guys schematics ground the stock plug? Wouldn't that create a short since 12V comes out of the common????

Your guys schematic and 4 crawlers are totally different..which one is correct?

Last edited by PirateMcgee; 11-20-2010 at 11:33 AM.
Old 11-20-2010, 11:35 AM
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do you even know and understand how a relay works? I do not understand why you are not getting the fact I followed my diagram and mine is working, if yours is not, time to start from scratch.
Old 11-20-2010, 11:41 AM
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The relay has nothing to do with grounding the stock plug......there is 12V coming out of the common regardless of if the HB or LB is on. So if this is connected to ground wouldn't that create a short? I understand the 12V coming out of the stock LB or HB in turn flips the switch in the relay. Not trying to be a jerk I just have some questions. If you don't want to clarify then don't

Last edited by PirateMcgee; 11-20-2010 at 11:52 AM.
Old 11-20-2010, 11:43 AM
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explain how the factory plug is being "grounded". oh and You might wanna watch the language mods don't like it.

my diagram to make it easier. I am also going to go out and check to make sure this is exactly what I ended up doing.

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Old 11-20-2010, 11:56 AM
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just checked everything and my relays are turning on an off fine and turning on the correct wires but when I plug in a bulb I get 12V (on the new socket) from the terminal that is supposed to go to ground in your schematic.
Old 11-20-2010, 11:57 AM
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oh and it was supers who's schematic shows grounding the stock plug not yours....

thanks for the help guys
Old 11-20-2010, 12:02 PM
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remember factory wiring is switched ground, the wiring after the relays will be switched power.

turns out though, I wired mine slightly different than that diagram and figured out why my lows stay on with my highs. On the old plug I have all three pins taken up not just two. I have two wires on the 12V common that goes to the 85 pin one on each relay. then each 86 pin on the two relays comes back to the factory plug as grounds as showed in that diagram.

in short, where it says "GND" on each 85 pin on the relays they are actually to +12v or back to the factory headlight plug.

I think I might have made that diagram before I realized these plugs were switched ground. Gonna make a new diagram shortly.

Last edited by xxxtreme22r; 11-20-2010 at 12:10 PM.
Old 11-20-2010, 12:03 PM
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this is 4crawlers diagram
http://www.4crawler.com/4x4/CheapTri...lightSG-SP.gif

see how the stock plug is connected....this is why I am confused lol
Old 11-20-2010, 12:15 PM
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see above comment. mine is like 4crawlers, i just didn't use his as a reference. only difference is my 85 and 86 pins are in reverse which is fine, doesn't matter which direction you send the power to the relay coil.
Old 11-20-2010, 12:16 PM
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gotcha.........thanks for double checking your setup
Old 11-20-2010, 12:22 PM
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np. now to change that diagram. and looking at iamsuperbleeders I see why he needs the diode in his, he is using the high beam relay to trip the low beam relay when the high beam is on. this keeps the lows on with his. the diode is there so the low beam relay does not trip the high beam relay.
Old 11-20-2010, 12:40 PM
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Originally Posted by xxxtreme22r
remember factory wiring is switched ground, the wiring after the relays will be switched power.

turns out though, I wired mine slightly different than that diagram and figured out why my lows stay on with my highs. On the old plug I have all three pins taken up not just two. I have two wires on the 12V common that goes to the 85 pin one on each relay. then each 86 pin on the two relays comes back to the factory plug as grounds as showed in that diagram.

in short, where it says "GND" on each 85 pin on the relays they are actually to +12v or back to the factory headlight plug.

I think I might have made that diagram before I realized these plugs were switched ground. Gonna make a new diagram shortly.

dude thanks! ill buy you a beer if you ever come to calgary
Old 11-20-2010, 02:11 PM
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got mine working........


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