Headlight harness question
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Senior User
Joined: Jul 2008
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Headlight harness question
Hello guys i have a Question...Has anybody try the heavy duty headlight harness from lmc....I am thinking about upgrading the harness..would like your thoughts and if anybody did this....Thanks
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MSEE
Joined: Apr 2004
Posts: 10,386
Likes: 35
From: Austin, TX
I can't comment on that particular model's quality, but significant gains can be seen by installing this kind of setup. Instead of drawing all the power through the headlight switch, the headlight switch turns on a relay which powers the headlights through heavier-duty wiring. Many people like to increase the gauge of the headlight power feed at the same time they install a relay setup, which can help direct more voltage at the headlights (less drop on the wiring itself). This particular model doesn't seem to say anything about making them brighter. I'd try to check with LMC on what gauge they use to power the headlights. If it's the same as the stock size, I wouldn't bother with it. The opportunity to use larger wire and hence squeeze some more candlepower out of the headlights is really the main advantage to doing the relay upgrade. That's the main reason people do it. But on a stock setup, there isn't any reason to direct power away from the headilght switch, because it's rated to handle the current. The old-style Ford setup has worked for decades and counting.
Thread Starter
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Senior User
Joined: Jul 2008
Posts: 128
Likes: 0
I can't comment on that particular model's quality, but significant gains can be seen by installing this kind of setup. Instead of drawing all the power through the headlight switch, the headlight switch turns on a relay which powers the headlights through heavier-duty wiring. Many people like to increase the gauge of the headlight power feed at the same time they install a relay setup, which can help direct more voltage at the headlights (less drop on the wiring itself). This particular model doesn't seem to say anything about making them brighter. I'd try to check with LMC on what gauge they use to power the headlights. If it's the same as the stock size, I wouldn't bother with it. The opportunity to use larger wire and hence squeeze some more candlepower out of the headlights is really the main advantage to doing the relay upgrade. That's the main reason people do it. But on a stock setup, there isn't any reason to direct power away from the headilght switch, because it's rated to handle the current. The old-style Ford setup has worked for decades and counting.
Thread Starter
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Senior User
Joined: Jul 2008
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Yep FMC nailed it...Sorry F.O.R.D., I'm always skeptical though of things that come from LMC, and they will never get my business again. I'd rather sandpaper the azz hole of an alligator in a telephone booth. If it were me I would look for a comparable piece from elsewhere. Normally what I do with LMC is get the idea (like the harness you posted) and then look at other companies that specialize (or at least are more reputable) in said area.
Postmaster
Joined: Oct 2005
Posts: 3,034
Likes: 1
From: NJ
I'm surprised no one has suggested this article. If you don't mind some wiring you can follow this article.
Whiter Whites, Brighter Brights .: Articles
Whiter Whites, Brighter Brights .: Articles
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Laughing Gas
Joined: Dec 2000
Posts: 780
Likes: 18
From: East Texas
Yep FMC nailed it...Sorry F.O.R.D., I'm always skeptical though of things that come from LMC, and they will never get my business again. I'd rather sandpaper the azz hole of an alligator in a telephone booth. If it were me I would look for a comparable piece from elsewhere. Normally what I do with LMC is get the idea (like the harness you posted) and then look at other companies that specialize (or at least are more reputable) in said area.
As far as the LMC harness, it's fairly straightforward, mine was a little short and I think I had to add some wire to reach to headlights, though I could be wrong. I would check it, but I'm driving the 05 today.
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