How to wire auxiliary lights.
#11
07-08-2012, 03:06 PM
Neil,
Here are some options showing how the aux lights should be connected, according to H-D's mounting instructions (=DOT regulations).
In this way the aux lights stay on only with lowbeam(spliced to the yellow wire).
If you want them to work with high beam, splice (6) to the highbeam wire (on my 2003FXD it's the white wire).
If you want them to work independently from high/low beam:
Splice (6) to the runing lights wire (see your manual for the color, on my 2003FXD it's the blue wire) or run the "unterminated wire" (6) (= wire to low beam in Fog Lamp Schematic) in the wiring harness back to the + on the battery or the aux fuse in the fuse box.
You can operate the switch (which comes with the H-D aux lights kit) to activate the coil in the relay which will turn on or off the fog lights/aux lights.
I have connected the passing lights on my FXD2003 in the same way and replaced the stock switch from the kit for the handlebar mounted aux switch kit and the chrome switch cap kit.
Here's a wiring diagram on how to wire aux lights using a relay:
Signal current from switch (86 ==> 85) activates coil; coil activates internal relay switch (30 ==> 87)
30 = + from battery (requires mim 2.5 mm2 wire)
87 = + to lamps (requires mim 2,5 mm2 wire)
85 = ground
86 = + (using a switch to activate relay) from:
- battery or
- running lights or
- low beam or
- high beam
Here are some options showing how the aux lights should be connected, according to H-D's mounting instructions (=DOT regulations).
In this way the aux lights stay on only with lowbeam(spliced to the yellow wire).
If you want them to work with high beam, splice (6) to the highbeam wire (on my 2003FXD it's the white wire).
If you want them to work independently from high/low beam:
Splice (6) to the runing lights wire (see your manual for the color, on my 2003FXD it's the blue wire) or run the "unterminated wire" (6) (= wire to low beam in Fog Lamp Schematic) in the wiring harness back to the + on the battery or the aux fuse in the fuse box.
You can operate the switch (which comes with the H-D aux lights kit) to activate the coil in the relay which will turn on or off the fog lights/aux lights.
I have connected the passing lights on my FXD2003 in the same way and replaced the stock switch from the kit for the handlebar mounted aux switch kit and the chrome switch cap kit.
Here's a wiring diagram on how to wire aux lights using a relay:
Signal current from switch (86 ==> 85) activates coil; coil activates internal relay switch (30 ==> 87)
30 = + from battery (requires mim 2.5 mm2 wire)
87 = + to lamps (requires mim 2,5 mm2 wire)
85 = ground
86 = + (using a switch to activate relay) from:
- battery or
- running lights or
- low beam or
- high beam
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kantdo55 (02-02-2017)
#13
07-08-2012, 05:38 PM
Road Master
#14
07-09-2012, 07:44 AM
Road Master
#15
07-09-2012, 08:09 AM
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I wonder if this wire will be able to handle the amperage when head light and aux lights are switched on.
In order to prevent a wire melt down and a short, I'd recommend to connect the aux lights as shown in the relay wiring diagram.
#16
07-09-2012, 08:49 AM
I was thinking of doing that myself. The blue wire seems to be the running lamp wire for the front turn signals and I thought I could piggyback the Aux lamps off the running lights. In the end I decided to do it the Harley way and ended up pulling my hair out when nothing worked. After checking and rechecking everything I realized that the factory harness was wired wrong and after that everything is great.
#17
07-09-2012, 08:55 AM
Road Master
#18
07-09-2012, 11:45 AM
You can rig it with a bar mounted switch to run the lights independent of the Hi/lo switch if you like, i.e., always on.
#19
07-09-2012, 12:42 PM
I just installed a light bar on my Fat Boy. Because I had an empty 15 amp block in my Fuse Box that was ignition on dependent, I was able to use that, with an in-line 15 amp fuse for safety. My 55w spot lights are aftermarket, and each has its own toggle switch for on/off. Once I got a safely fused power source to them, I was all set. Certainly different than the relay system I did on my Dyna per the above diagram, but every bit as safe and effective.
