Light Wiring ?'s - The 1947 - Present Chevrolet & GMC Truck Message Board Network

70GMCer · 07-31-2005, 07:12 AM

I read on here that the way to go for headlights is with H4's and rewire with relays to get direct voltage from the battery to the lights. Wouldn't the same go for the tailights as well. I mean using relays for the newer LED lights, or is that overkill, or can it even be done?

As far as the H4's go, what do you have to buy? Does someone sell a kit that includes everything you need, or would I go to the parts store and buy the bulbs? Do they have H4's that fit into the buckets like the originals in our trucks?

Trying to find out as much as I can before changing mine out.

thanks

70c10 · 07-31-2005, 10:07 AM

Ebay has a lot of sellers that sell the kits between $30 -$40 including shipping. I'm thinking about trying a set myself. As far as LED taillights, I just used an electronic flasher.

Longhorn Man · 07-31-2005, 10:22 AM

LEDs take very small amounts of power to use.
A relay is used to provide large amounts of electricity while using small amounts to trigger it.

Basicly, there would be absolutly no advantage to doing it.

4x4Poet · 08-04-2005, 05:21 AM

MadElectrical.com has some great tech info. Click on "electrical tech" for more info.

07-31-2005, 07:12 AM	#1
70GMCer Senior Member Join Date: Apr 2005 Location: Joppa, Maryland Posts: 4,408	Light Wiring ?'s I read on here that the way to go for headlights is with H4's and rewire with relays to get direct voltage from the battery to the lights. Wouldn't the same go for the tailights as well. I mean using relays for the newer LED lights, or is that overkill, or can it even be done? As far as the H4's go, what do you have to buy? Does someone sell a kit that includes everything you need, or would I go to the parts store and buy the bulbs? Do they have H4's that fit into the buckets like the originals in our trucks? Trying to find out as much as I can before changing mine out. thanks __________________ 1997 GMC Sierra Ext 1965 Mustang

07-31-2005, 10:07 AM	#2
70c10 67-72 Addict! Join Date: Feb 2002 Location: The TAX State! Posts: 7,857	Ebay has a lot of sellers that sell the kits between $30 -$40 including shipping. I'm thinking about trying a set myself. As far as LED taillights, I just used an electronic flasher. __________________ Jim 1970 C/10 Fleetside w/Ghost Flames Lowered 4.5" front and 4" rear (Raked) 355/350 Turbo w/shift kit 10" Redneck Performance Verter w/2500 stall Hooker Super Comps part#2808-1 Performer RPM Air-Gap 12 Bolt w/3:73 gears- Eaton Posi Comp Cams XE262 with 1.6 Crane Energizers, Road Demon 625 and Brodix IK 180 heads Last edited by 70c10; 07-31-2005 at 10:08 AM.

08-04-2005, 05:21 AM	#4
4x4Poet Registered User Join Date: Nov 2004 Location: "Under Montana skies." Posts: 1,836	MadElectrical.com has some great tech info. Click on "electrical tech" for more info. __________________ '71 GMC K20 Suburban, '71 GMC K10 Suburban, '72 Chevy C10 CST Suburban, '72 Chevy K20 clunker pickup.

07-31-2005, 10:22 AM	#3
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	LEDs take very small amounts of power to use. A relay is used to provide large amounts of electricity while using small amounts to trigger it. Basicly, there would be absolutly no advantage to doing it.



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