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Old 02-09-2003, 03:35 PM   #1
SonicWRX
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Question How to wire driving lights into foglight switch?

I am going to replace my factory fogs with a set of Cibie Oscar+ like the Scoobysport setup. I would like to use the stock fog lamp switch to control the Cibies, but have them come on with the high beams instead of the low beams. I searched on this, but the threads are old enough that the wiring diagram links in them are dead.

Thanks!

Mitch
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Old 02-09-2003, 05:41 PM   #2
CosmoTheCat
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Old 02-09-2003, 06:28 PM   #3
SonicWRX
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I tried Scoobymods first actually. If it's there I can't turn it up.

There are several people there asking my same question though.

I guess I will pour over the wiring diagrams and see if I can figure it out.

Mitch
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Old 02-09-2003, 10:51 PM   #4
ERJmech
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the link is http://www.scoobymods.com/forums/sho...?threadid=1022

I did this four days ago. BUT heres the big BUT this mod allows the driveing lights to be when ever the headlights are on, low or high beams. this makes the factory switch useable. After this mod is done go out to the driveing lights and tap off the wire i belive it was white with black strips on the right side but i dont remember so use the one that has the power on it when the lights are on, connect this wire to a relay and ground the relay by by tapping in to the red wire on the headlight harness. The headlights use a common positive/switch ground circuit so the red wire is only grounded when the highbeams are on. I tapped off the right light I dont know the color on the left light but it would be the right most wire if your looking from a seat. then just run a line from the battery to the the relay and then to the lights and then ground the light to any where on the frame or if they are less than 55watts u can use the stock ground wire.

I know that might be a little confuseing if u have a question I'll try to explain that part better.
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Old 02-10-2003, 09:02 AM   #5
SonicWRX
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I appreciate the help, but you're right, I have no idea what you've just said there.

Yes, I had seen the mod you posted, but I do not want the fogs on with low beams; only high beams since I am replacing the fogs with driving lights.

I essentially want to reverse the functionality of the foglight wiring.

The conditions to be met for my driving lights to burn should be:

ignition on AND headlights on AND foglight switch on AND high beams on = driving lights on

Mitch
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Old 02-10-2003, 09:42 AM   #6
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The positive feed for the relay coil is through one of the headlight relays, and the negative is from the low-beam switched ground. The ground connection is all that needs to be altered.
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Old 02-10-2003, 10:11 AM   #7
SonicWRX
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Ahhh, that's what I wanted to know. I traced the whole wiring diagram and got a bit confused with all the DRL stuff in the headlamp circuit. But I did see that the ground for the foglight relay coil passed through the dimmer switch. On dim, the ground is made. On highbeam, the ground goes away. Could it be as simple as moving the ground to the highbeam side of the dimmer switch?

Mitch
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Old 02-10-2003, 11:58 AM   #8
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Yes, that's all one needs to do. Maybe instead of tapping into a high current wire, it's better to pull the blade out of a connector and solder or crimp to it.
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Old 02-12-2003, 02:30 PM   #9
WRX Bamboo Steamer
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I did it using the factory wiring and the foglight relay. I have been using it for about a month without any problems. See this thread: http://forums.nasioc.com/forums/show...hreadid=306666
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Old 02-18-2003, 01:03 PM   #10
SonicWRX
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Lightbulb

I found what I think is the best and easiest way to do this. See this post on Scoobynet for the full writeup.

The following schematic pretty much sums it up:



This allows you to have the driving lights on only if the high beams and the factory foglight switch are on.

Mitch
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Old 02-18-2003, 01:37 PM   #11
WRX Bamboo Steamer
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The WRX uses a switch negative for the headlights so you will need to modify the relay coil wiring a bit.
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Old 02-18-2003, 02:18 PM   #12
SonicWRX
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Quote:
Originally posted by WRX Bamboo Steamer
The WRX uses a switch negative for the headlights so you will need to modify the relay coil wiring a bit.
But when the negative is switched and the circuit made there is 12V + at the high beam. This is the signal to close the 4 blade relay in SilverSmith's diagram.

Mitch
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Old 02-18-2003, 02:22 PM   #13
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The problem is that there is always 12v+ at the high beams, they only turn on when the ground is connected when the switch is hit.
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Old 02-18-2003, 02:52 PM   #14
SonicWRX
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Doh! So instead of taking the 4-blade relay #86 terminal to earth just anywhere, it can go to the switched ground at the high beam. That would work, yes? Like this:



Mitch

Last edited by SonicWRX; 02-18-2003 at 04:12 PM.
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