Headlight Upgrade - The 1947 - Present Chevrolet & GMC Truck Message Board Network

57halfton · 12-31-2013, 08:30 PM

Well I decided to upgrade the headlights in my 57, what I got is the custom headlights part # 36-0281 out of the LMC catalog and also got a heavy duty headlight harness part # 36-3580. The first thing the directions say is not to extend any of the wiring in the harness but it looks like the wires are too short to reach where they have to go. Also I haven't figured out where to tie in this new harness to my headlight switch so I can turn them on and off.
Anyone here ever use this harness before from LMC ?
Thanks
Gene

**mr48chev** · 12-31-2013, 08:40 PM

If you are running Halogens that use an H-4 or similar bulb I'd seriously suggest installing relays and connecting that harness to the relays and the wires from the dimmer switch to the relays. That saves a lot of switch problems. You can mount the relays right on the core support next to or in the same area the original regulator was in and then can place the relays so your harness reaches. The original wires should handle the load to the relays without an issue as it takes very little amperage to trigger the relays.

Daze57 · 01-01-2014, 01:08 AM

there are alot of diagrams that show that particular hook up -check under relay diagrams '
Mr 48 is correct about using relays to tag into .

57halfton · 01-01-2014, 12:02 PM

The heavy duty wiring kit from LMC that I have has relays for the headlights.

**mr48chev** · 01-02-2014, 12:31 AM

Quote:

Originally Posted by 57halfton

The heavy duty wiring kit from LMC that I have has relays for the headlights.

Cool, that makes things a lot simpler. I'd just figure out how to wire between the dimmer switch and the relays and call it good.

12-31-2013, 08:30 PM	#1
57halfton Registered User Join Date: Apr 2011 Location: Napa California Posts: 47	Headlight Upgrade Well I decided to upgrade the headlights in my 57, what I got is the custom headlights part # 36-0281 out of the LMC catalog and also got a heavy duty headlight harness part # 36-3580. The first thing the directions say is not to extend any of the wiring in the harness but it looks like the wires are too short to reach where they have to go. Also I haven't figured out where to tie in this new harness to my headlight switch so I can turn them on and off. Anyone here ever use this harness before from LMC ? Thanks Gene

12-31-2013, 08:40 PM	#2
mr48chev Registered User Join Date: Jul 2007 Location: Toppenish, WA Posts: 15,718	Re: Headlight Upgrade If you are running Halogens that use an H-4 or similar bulb I'd seriously suggest installing relays and connecting that harness to the relays and the wires from the dimmer switch to the relays. That saves a lot of switch problems. You can mount the relays right on the core support next to or in the same area the original regulator was in and then can place the relays so your harness reaches. The original wires should handle the load to the relays without an issue as it takes very little amperage to trigger the relays. __________________ Founding member of the too many projects, too little time and money club. My ongoing truck projects: 48 Chev 3100 that will run a 292 Six. 71 GMC 2500 that is getting a Cad 500 transplant. 77 C 30 dualie, 454, 4 speed with a 10 foot flatbed and hoist. It does the heavy work and hauls the projects around.

01-01-2014, 01:08 AM	#3
Daze57 Registered User Join Date: Jul 2011 Location: Las Vegas - Nev. aka Sin City Posts: 1,835	Re: Headlight Upgrade there are alot of diagrams that show that particular hook up -check under relay diagrams ' Mr 48 is correct about using relays to tag into .

01-01-2014, 12:02 PM	#4
57halfton Registered User Join Date: Apr 2011 Location: Napa California Posts: 47	Re: Headlight Upgrade The heavy duty wiring kit from LMC that I have has relays for the headlights.



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