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2006 chevy trailblazer_ls
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19 Posts
Discussion Starter #1
I have 8000k low beams with relay that run perfectly. I have a DRL killer.
I just installed new Fog lights and have 6000k HID in them with a relay.
The Low beams are turned on via the signal from my left factory headlight. My fogs are turned on via the signal from my right factory headlight.

The Problem: When I turn on my car. My left fog light doesn't come one but all others do. If I turn the switch manually for my lights to come on, then all of my lights turn on and remain on.

Question: What could cause my left fog not to come on with the rest but still operate when manually turned on?:confused:
 

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1,354 Posts
I would imagine it would have to do with your drl killer, not sending the signal to the fogs. Have you tried removing the drl killer and doing "the capacitor" mod?
 

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2007 chevy trailblazer_ss_1ss
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2,006 Posts
I have 8000k low beams with relay that run perfectly. I have a DRL killer.
I just installed new Fog lights and have 6000k HID in them with a relay.
The Low beams are turned on via the signal from my left factory headlight. My fogs are turned on via the signal from my right factory headlight.

The Problem: When I turn on my car. My left fog light doesn't come one but all others do. If I turn the switch manually for my lights to come on, then all of my lights turn on and remain on.

Question: What could cause my left fog not to come on with the rest but still operate when manually turned on?:confused:
this seems to be the problems in Trailvoy's from years '02-'06.. even in the SS platform... some have said its a grounding issue, and some just put up with just manually turning the switch... something to do with the Auto Headlight feature in the earlier years.. like my friend (who is also a memeber on here) has an '03 Voy.. and his Auto Headlight function kicks his headlights on the minute the he starts cranking the Voy.. where as my brother in his '07 LT, and me in my '07 SS our Auto Headlights only kick on when the truck is engaged into gear..and not when we are cranking the engine over..there for providing full power the ballasts since the truck is already running.

but on a side note.. why did you put a relay to your fogs? they arent neccesary.. have you tried taking the realy off and just directly hooking your fogs to the hid's and turning them on with the button next to your headlight switch?
 

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2006 gmc envoy_denali
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148 Posts
i had a similar problem but it was with the right lowbeam.. the hids ballasts last forever or they crap out decently quick..go back to were u got the lights and they should be under warrenty..:m2::m2:
 

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2005 chevy
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6,469 Posts
I have 8000k low beams with relay that run perfectly. I have a DRL killer.
I just installed new Fog lights and have 6000k HID in them with a relay.
The Low beams are turned on via the signal from my left factory headlight. My fogs are turned on via the signal from my right factory headlight.

The Problem: When I turn on my car. My left fog light doesn't come one but all others do. If I turn the switch manually for my lights to come on, then all of my lights turn on and remain on.

Question: What could cause my left fog not to come on with the rest but still operate when manually turned on?:confused:
this seems to be the problems in Trailvoy's from years '02-'06.. even in the SS platform... some have said its a grounding issue, and some just put up with just manually turning the switch... something to do with the Auto Headlight feature in the earlier years.. like my friend (who is also a memeber on here) has an '03 Voy.. and his Auto Headlight function kicks his headlights on the minute the he starts cranking the Voy.. where as my brother in his '07 LT, and me in my '07 SS our Auto Headlights only kick on when the truck is engaged into gear..and not when we are cranking the engine over..there for providing full power the ballasts since the truck is already running.

but on a side note.. why did you put a relay to your fogs? they arent neccesary.. have you tried taking the realy off and just directly hooking your fogs to the hid's and turning them on with the button next to your headlight switch?
I have mine setup the same way. Auto quad lows and fogs, is the result. :D :thumbsup: I also have a similar problem, but for me it's the driver's side low beam that doesn't always fire. I assume it's a ballast issue, because it only happens on engine startup, in conditions where the auto lights would come on. I had planned to go out and swap the ballast around with another just to be sure, but I procrastinated too long and stopped caring... :bonk:
 

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2002 chevy trailblazer_ltz
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2,762 Posts
I have the same problem with the drivers side driving light and asked this question before with no response.Tries switching switch back and forth(some times it works and sometimes not).wish I knew how to fix it!I have the cap mod(I thought that's the DRL killer) and quad mod too.
 

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2005 chevy
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6,469 Posts
I have the same problem with the drivers side driving light and asked this question before with no response.Tries switching switch back and forth(some times it works and sometimes not).wish I knew how to fix it!I have the cap mod(I thought that's the DRL killer) and quad mod too.
Umm, :no:... They are used to do the opposites of each other
 

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2006 chevy trailblazer_ls
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19 Posts
Discussion Starter #9
My fog-lights are not factory. I bought and mounted them with brackets. So the factory turn on for the fogs would do nothing. I have tried switching the ballasts and the problem still remains on the left side. I'm going to try switching the bulbs next.

Sounds like several other people are equally annoyed. You would think with a relay on start up they would get plenty of power.
 

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2006 chevy
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338 Posts
You need three 30-40 amp SPST relays and that is it, one for each set of lights. If you wire all of the lights (fogs, highs, lows) properly with a relay, you won't need a DRL kill module or capacitor mod. Ground all your lights and relays directly to the battery and run the power to the relays directly from the battery as well. Make sure to fuse (30-40amp) each relay. Use the positive wires from your factory wire harnesses going to the factory lights to trigger each relay. If still having issues after installing the relays and connecting directly to the battery for the positive and negative wires, then the problem is going to be the ballast or bulb.
 

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287 Posts
http://cgi.ebay.com/ebaymotors/UNIV...r_Truck_Parts_Accessories&hash=item20b6bbcbc3


when I aftermarket installed the factory fogs in my 05 LS, I bought a pre made wireharness the one in the link above, I then used power straight from the battery and signal wire from the cruise control so they would shut off with the truck, other than the fuse link getting loose and needing replaced, I have had 0 problems, my hids are 35watt 6000k from ebay and the kit says it handles 55watt just my :m2:
 
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