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Old 08-18-2018, 02:17 PM
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Tugela Tugela is offline
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I found lots of threads about connecting bumper-mounted aux lamps to the existing fog light switch, but nothing describing what I want to do, which is to connect aux lamps to a separate, independent, factory switch.


Here's what I have:


  • 1 pair of LR Safari 5000 driving lights mounted to factory brush guard
  • 1 aftermarket wiring kit with relay, grounds, and integrated switch
  • 1 spare factory fog light switch with harness


I want to connect the wiring from the lights to the spare factory fog light switch. I will install the spare switch in the blank space on the dash alongside the existing fog light switch.


Here's the issue: the harness coming out of the factory switch has 4 wires:
  • red
  • blue
  • black
  • blue/black
The wiring for the aftermarket kit has 3 wires running to the integrated switch:
  • yellow
  • red
  • black
I can splice the wires from the kit to the factory switch but I don't know which color wire from the aftermarket kit connects to which wire on the factory switch harness.


Has anyone done this and can tell me "yellow goes to blue, red goes to red, black goes to black, blue/black hangs in space and doesn't do anything"? Or whatever the correct combination is?


Also, where is the best place on the firewall to pass the wiring through? Is there an existing spot behind the dash on the driver's side that I should look for?
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  #2  
Old 08-18-2018, 03:29 PM
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CORover CORover is offline
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Or you can do this; Switch Pros SP-9100. A little pricey but does everything you need and gets rid of some wires and components and keeps all the switches in one small place. I just went through this ordeal on my "rig" (sorry) and this was the best solution I could come up with. I had switches, relays, connections and wire everywhere. This sill simplify the whole mess.


I did get everything hooked up using factory switches but it was very time consuming and is still a mess. For the switches, I had to use the electrical diagram in the Rave and make a few educated guesses on inputs and outputs of the switches.
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Old 08-18-2018, 06:05 PM
BarryO BarryO is online now
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Quote:
Originally Posted by Tugela View Post
Here's the issue: the harness coming out of the factory switch has 4 wires:
  • red
  • blue
  • black
  • blue/black
According to the RAVE electrical manual, the wires for that switch are:
  • black - ground (for the two indicator lamps)
  • red/brown - power for green indicator lamp
  • blue/black - +12V power input
  • blue/purple - power output (i.e., gets 12V when the switch is pressed in)
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Last edited by BarryO; 08-18-2018 at 07:05 PM.
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Old 08-18-2018, 09:57 PM
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Tugela Tugela is offline
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Thanks for the info from RAVE, that is helpful to know what all the factory wires do. The diagram that came with the Hella wiring kit doesn't say what the 3 wires do that connect to the switch. Here is the link to the diagram. The kit I have is shown at the bottom of the first page: spotlight harness. Will the Hella wiring setup (black, red, yellow) be compatible with the factory 4-wire harness?
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Old 08-19-2018, 01:52 AM
BarryO BarryO is online now
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Does the aftermarket switch light up when turned on? If so, my wild ass guess as to the wiring is (i.e., don't blame me if you burn up your rig's harness ):
  • red - +12V input; check for continuity to the red ring connector with an ohmmeter
  • black - ground (for the internal indicator light); check for continuity to the black ring connector with an ohmmeter
  • yellow - +12V output; gets 12V when the switch is closed. Check this with a voltmeter

If all this checks out, then you could hook it up follows. You could put .250" male connectors on the fog light wires and just plug them into the female connectors on the aftermarket harness:
  • black --> black
  • blue/black --> red
  • blue/purple --> yellow

Hook the red/brown wire to the indicator lamp power on another switch, if you want the switch to light up green at night
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  #6  
Old 08-19-2018, 11:11 AM
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Thanks, this is useful. Electrical is not my strong suit. I haven't hooked anything up yet, but the Hella switch has a power indicator LED on its face so it should illuminate when the lights are on. I'll give it a go and see what happens.
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  #7  
Old 08-19-2018, 12:55 PM
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Momentary fog light switch or the aux light switch is useless. Grab a cruise control switch, slap the fog/aux switch cover on it, and now you have a latching on/off switch. You can tap into the dash lights for nightime illumination, then you can either file down the plastic hump to make any dash plug fit or use a c/c switch pigtail. Then connect the rest to your aux relay. Bingo factory look with aux wiring harness.

Also I highly recommend grabbing a cheap digital meter. It makes guessing the 12+, ground, and illumination a breeze.
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  #8  
Old 08-19-2018, 01:27 PM
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Tugela Tugela is offline
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What do you mean by "momentary fog light switch"? The extra factory switch I have is a duplicate of the front fog light switch that does "latch", by which I assume you mean that when you push the button it clicks and holds a depressed position until pushed again to release/turn it off. I do have a multimeter and will use it to test the functions of the auxiliary harness wiring. Thanks for the suggestions and patience, this is my first attempt at wiring something more complicated than putting a 1995 RRC analog dash clock into my D1.
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  #9  
Old 08-19-2018, 02:12 PM
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Do you use your factory installed fog light switch?
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  #10  
Old 08-19-2018, 02:16 PM
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Tugela Tugela is offline
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Quote:
Originally Posted by luckyjoe View Post
Do you use your factory installed fog light switch?

Yes. Living in Seattle I use my front and rear fog lights quite a bit.
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  #11  
Old 08-19-2018, 04:47 PM
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Yeah with a D1 switch you’ll be fine. Just so many people grab the D2 switches & complain when it doesn’t latch. One of my favorite mods on my 98 D1 was the RRC Analog clock!
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Old LR's:

97 D1 SE Rio Red (totaled)
97 P38 HSE Vitesse AA Yellow (Sold)
03 D2 SE Java Black (Sold)
03 D2 SE7 Zambezi Silver (Sold)
98 D1 LSE British Racing Green (Sold)
04 D2 SE Zambezi Silver (Sold)
02 D2 SE Java Black (Sold)
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  #12  
Old 08-19-2018, 05:36 PM
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This wiring diagram is what I used to wire up my front aux/fog lights:
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