Independant Headlight Relay Conversion

Gannon · Post by **Gannon** » Sat Sep 22, 2007 10:16 pm

Some of you may well know that electrical current flowing through a wire causes a voltage drop. This voltage drop is caused by cable impedance and thus is directly proportional to cable length (and inversly proportional to cable CSA)

By the time the current travells from the battery to the dashboard and back to the lights, it must have lost a volt or 2.
So i figured i would shorten the length of my headlight cabling.

I used 2 relays (one for low beam and the other for high) and installed them behind the passenger side headlight.
I took a heavy gauge cable directly from the alternator output to the relays and then to the headlights. I havent tested the voltage at the globe, but i can tell you they are brighter and are a whiter light.

Pics and a diagram coming soon.

90brumby · Post by **90brumby** » Sat Sep 22, 2007 11:35 pm

sounds goood im lookin at doin sometin like this to the brumby was it difficult at all

Chris_Rogers · Post by **Chris_Rogers** » Sun Sep 23, 2007 8:48 am

probably the reason liberty put them outside. did mine that way when I did the swap.

sven · Post by **sven** » Sun Sep 30, 2007 12:27 am

with the upgraded wiring do not be tempted to go crazy with increased wattage globes.

I did the same in my old L, & put in 90/175 (or there abouts) globes...cannot remember the exact wattage but it was near 500W with driving lights on high beam

Light was good, but not that much better, for the hassle and expense and off road the globes would overheat and blow...very costly.

Only advice would some of thsoe 'white' globes by Philips...very good in the wet

Suby Wan Kenobi · Post by **Suby Wan Kenobi** » Sun Sep 30, 2007 9:23 pm

A while back i changed over the switching in Dads old MY, i used the biggest cable and the biggest relays and much to my delight the standard sealed beams gave off more light than my liberty lights. Did the same to my RX and the difference wasnt as noticeable

YouTube · Post by **El_Freddo** » Mon Oct 01, 2007 1:46 am

Suby Wan Kenobi wrote:A while back i changed over the switching in Dads old MY, i used the biggest cable and the biggest relays and much to my delight the standard sealed beams gave off more light than my liberty lights. Did the same to my RX and the difference wasnt as noticeable

Great anti-climax there Subi Wan

Bennie

Ben · Post by **Ben** » Tue Oct 02, 2007 4:28 pm

My Brumby's sealed beams are actually pretty good, I was quite surprised on my first night trip - will certainly be upgrading the wiring though when I get a chance to wire in the spotties.

Anyone know if I can get insert globe versions of the sealed beams?

BaronVonChickenPants · Post by **BaronVonChickenPants** » Tue Oct 02, 2007 8:11 pm

Yes you can, from memory they're about $80 each without globes, been a whiles since I looked though.

Jordan.

mattl200 · Post by **mattl200** » Tue Oct 02, 2007 8:20 pm

the semi sealed beam inserts are the same as 80 series landcruser for the dual headlight brumby/wagon

if its dual headlight dont use the h1 inner replacements they short out on the body of the car and you have high beam all the time
unless you wire relays in at the same time

and you can get them for single headlight but not sure of a part number

Gannon · Post by **Gannon** » Sat Apr 26, 2008 9:54 am

I thought i had already posted pics, but i'll try again

My new headlight loom

What i connected it to

I made it so if i wanted to revert back to factory wiring, i could just disconnect the bullet connectors and plug the headlight socket back into the factory wiring

nncoolg · Post by **nncoolg** » Sun Mar 22, 2009 6:24 pm

I did the semi-sealed conversion on my M.Y. wagon, i got them out of an old 180B, They are metal, not glass, and as mentioned above, short on the retainers, so need rewiring with a relay, they work good, and you can buy the nice big bulbs. I think the older M.Y.s with the single light could be replaced with the autobarn polycarbonite style semi-sealed lights from, like, a hilux. That would look cool.