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Fog light mod

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  #61  
Old 01-14-2010 | 03:15 PM
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and you shouldn't have to run a fuse on the jumper cuz the fog light circuit is already fused before the relay
 
  #62  
Old 01-14-2010 | 05:22 PM
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Originally Posted by Capt. Obvious
alls this mod is doing is keeping this circuit energized when the high beams come on. the lighting circuit can easily handle the current from the high beams and fog lights. just like it handles both with low beams and fog lights. and worse case, the stock fuse would prevent any overload. if they were wired in series that would cause a problem but the lights are in parallel.
Thank you Captain Obvious....... ha just wanted to say that...
I have it hooked up with the fuse right now, did it before you mentioned that a fuse prolly wasn't necessary, soon as it's dark enough I'll go for a spin and see how it works.
 
  #63  
Old 01-14-2010 | 05:48 PM
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Originally Posted by Capt. Obvious
alls this mod is doing is keeping this circuit energized when the high beams come on. the lighting circuit can easily handle the current from the high beams and fog lights. just like it handles both with low beams and fog lights. and worse case, the stock fuse would prevent any overload. if they were wired in series that would cause a problem but the lights are in parallel.
The lights being wired in parallel ensures that each is getting 12v while each light is pulling the amount of amperage that it needs. The fuse is then sized accordingly to how much amps the HEADLIGHTS ONLY pull. If you jumper this wire and run it off of the same circuit, you will be pulling more amps, running the risk of blowing fuses.

Now I must say that I do not know which circuit the 12v coming into that relay that you are "jumping" over to the fog lights leads is on, so you may not have any issues.

I also must state that the relay you are pulling out of the panel may be used to turn the lights OFF only when high beams are turned on. If this is the case, you will have no problem doing this mod.
 
  #64  
Old 01-14-2010 | 06:45 PM
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Originally Posted by mjackson92rs
The lights being wired in parallel ensures that each is getting 12v while each light is pulling the amount of amperage that it needs. The fuse is then sized accordingly to how much amps the HEADLIGHTS ONLY pull. If you jumper this wire and run it off of the same circuit, you will be pulling more amps, running the risk of blowing fuses.

Now I must say that I do not know which circuit the 12v coming into that relay that you are "jumping" over to the fog lights leads is on, so you may not have any issues.

I also must state that the relay you are pulling out of the panel may be used to turn the lights OFF only when high beams are turned on. If this is the case, you will have no problem doing this mod.
ya, after looking through wiring to double check, this relay (#1) ONLY opens the circuit (turning off power) when the high beams come on. so it wont effect anything else other than keeping the fog lights on. i checked and the fog lights get their 12v from there own circuit, seperate from the low or high beams, so they won't over amp either of those circuits. they have their own fuse in series with the relay so its well protected. now this is all on my 97 with the 2 relays, so i can't say fo sho for the single relay newer trucks. but i'll look into it.

P.S. not sure if this 'VOIDS' the warrenty HAHA!
 
  #65  
Old 01-14-2010 | 06:48 PM
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Originally Posted by Maxx_Magnum
Thank you Captain Obvious....... ha just wanted to say that...
I have it hooked up with the fuse right now, did it before you mentioned that a fuse prolly wasn't necessary, soon as it's dark enough I'll go for a spin and see how it works.
lol, thats me
not that it hurts to have the jumper fused, if its like mine, its tied into the running lights, so if the fog lights shorted, you'd only lose them and not the others. either way, its only a 10 or 15 amp fuse
 
  #66  
Old 01-14-2010 | 07:13 PM
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Originally Posted by Maxx_Magnum
I'm not an electrical engineer by any means, but looking at the relay diagram it seems there would be power going through the bypassed circuit anyway, probably when low beams are on.

This is what I have setup that works for this mod, safe or not. You got me thinkin now anyways.... maybe I'll hold off for a bit while the opinions come in...


haha notice my drl fuse missing, I pulled that out the day I got it
To be on the safe side and to make sure we are powering the fog lamps from the 10 amp fused curcuit in the power distribution center and not thru the headlight light curcuit. Leave the mod in place and pull the 10 amp fog lamp fuse located below your missing DRL fuse. If we have done this is correctly the fog lamps should not work, and everything else should work as normal. If they still work with this fuse removed then we are back at square one and this is not a safe mod.

Dave
 
  #67  
Old 01-14-2010 | 07:17 PM
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I've got another modification for the fog lights. Replace the factory 37 watt bulbs with 55 watt H11 bulbs. I was looking at the headlights on my mom's 4Runner a long time ago and the H11s look really similar to the 896 and 893 light bulbs that our trucks use. The only modification I can see at this point would be to change the connector. And 94-98 trucks would have to switch to 99-01 fog light housings. But with this modification you would NEED to use the relay.

Does anybody know the color wire on the back of the headlight switch that goes to the relay? My truck did not come from the factory with fog lights, but I added Mopar ones and built my own harness with a relay and switch. Now I would like to get a factory fog light switch and run that wire to the relay to switch it on. 99 and newer please.
 
  #68  
Old 01-14-2010 | 07:20 PM
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ya, the fog light circuit is seperate. with the fuse out it only kills da foggys and not the heads
 
  #69  
Old 01-14-2010 | 07:27 PM
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Originally Posted by Capt. Obvious
ya, the fog light circuit is seperate. with the fuse out it only kills da foggys and not the heads
Are you talking about me? If so, I'm not worried about the fogs going off with the high beams, thats what driving lights are for.
 
  #70  
Old 01-14-2010 | 07:48 PM
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Originally Posted by PurplDodge
Are you talking about me? If so, I'm not worried about the fogs going off with the high beams, thats what driving lights are for.
naw, my bad, was responding to xjarhead. just got outta turn.
 



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