One More Headlight Relay Thread

[Johns66]

Originally Posted by TR65

Guys,

There are a number of good headlight relay conversion threads on the board. Here are a few of them:

http://67-72chevytrucks.com/vboard/s...elay+headlight

http://67-72chevytrucks.com/vboard/s...elay+headlight

http://67-72chevytrucks.com/vboard/s...ight=headlight

I am going to add one more based on my recent experience. My headlight switch failed after I installed halogen bulbs in the truck so it was time to go to relays.

I started with a heavy duty headlight harness from LMC Truck #36-3580 ($30). It includes the relays and new headlight lamp connectors. It also has power wire connectors and plug in connectors to the relays. The connector that is supposed to hook to the stock truck wiring is not correct for our trucks and is of no use.

I cut the harness apart and reworked it as shown below. It is a good starting point.

Works like a champ. My next step is to convert from sealed beam to H4 bulbs in Hella E-Code Reflector lamps as explained by Rogue in this thread.

http://67-72chevytrucks.com/vboard/s...d.php?t=395480

TR

I know this is an old post, but it looks like the blue/white striped wire is ground off the relay and the brown and white wires off the relay are high and low beam that connect to the factory plug for the dimmer?

[TR65]

Maybe I don't understand the question, but: The only colors that matter are the brown (tan) and light green wires from the truck harness.

The brown (tan) wire from the truck is the low beams and should go to the low beam relay coil. The wire from the relay switch goes to the horizontal tab on the bulb connector.

The light green wire from the truck goes to the high beam relay coil. The wire from that relay switch goes to the vertical tab on the bulb connector according to the diagram in the post.

Then hook up the grounds, and power wires.

Good luck men,

TR

[kieth]

I ADDED THE hella e code reflectors with h4 bulbs, had already done the relay wiring upgrade with halogen bulbs, but the hellas' are "light years ahead" ha.........they look like aircraft landing lights.......well worth the $130 . wonder if they make a set of just high beam only bulbs.......Kieth