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Old 01-30-2012, 11:19 PM
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J.A. J.A. is offline
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Join Date: Jul 2007
Location: NY
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J.A. J.A. is offline
Senior Member
J.A.'s Avatar
 
Join Date: Jul 2007
Location: NY
Posts: 1,431
J.A. will become famous soon enough
Quote:
Originally Posted by DragonRunner View Post
I've read J.A.'s write up and others here regarding the Fog Light mod. What I can't understand is why there's a part 2 for the high beam issue. After the mod part 1 isn't the fog light relay now powered anytime the ignition is on, thus the fog lights should operate regardless of low/high beam selection?

If we perform mod 2, do we lose the auto-off feature of the headlights after we take the key to off? (I read - but can't find it again - a thread mentioning that after this mod the auto-off feature is nullified).
In order for the fog lamps to light up, the fog relay needs to be energized. To become energized it needs both positive and negative available at the coil. Part one brings 12V+ positive to one side of the coil anytime the ignition is on. Since negative is at the other side of the coil anytime the headlight dimmer stalk is in the low beam position the fogs work "anytime" as long as you dont choose the high beams. As soon as you switch on the high beams or the "flash to pass" mode, then negative is removed from the coil and hence the need for part 2. Part 2 brings ground (negative) to the respective side of the fog lamp relay coil whenever the fog switch is on regardless of the headlamp dimmer position.

Last edited by J.A.; 01-30-2012 at 11:23 PM.
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