2 wire roof light hook up

Printed From: the12volt.com
Forum Name: Relays
Forum Discription: Relay Diagrams, SPDT Relays, SPST Relays, DPDT Relays, Latching Relays, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=103275
Printed Date: May 18, 2024 at 12:26 PM

Topic: 2 wire roof light hook up

Posted By: rki0003
Subject: 2 wire roof light hook up
Date Posted: March 20, 2008 at 11:11 PM

Hi i got a xtc 4 light bar on the roof of my hummer . It has 2 wires coming out a white and a back wire .

I need your help on how to hook this up with a relay and a switch . If you can draw me a diagram i wil hel me tremendosly . Thank you RKI

Replies:

Posted By: techman93
Date Posted: March 20, 2008 at 11:33 PM

The black is probably for a ground and the white will be positive when you want them to go on. Run both wires into vehicle under driver side dash. Ground the black to a factory ground.
To wire a relay and a switch you will need to get a 30a/40a relay spdt or spst whichever you can find, either will work in this application. Then a good toggle switch of your preference. Then I would wire this way to have lights on only with key on.
pin 85 ground
pin 86 switch contact
pin 30 to 12v+ source with an inline fuse rated to 30a
pin 87 to white wire to lights

second contact of toggle to an ignition or accessory source

2003 - 2006 Hummer H1 Ignition green at ignition harness

2003 - 2008 Hummer H2 Ignition Pink at ignition harness

2006 - 2008 Hummer H3 Ignition WHITE/ green or dark blue at ignition harness

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The wire I'm test'n isn't doin' what it's supposed to be doin'... I am so glad I printed that tech sheet, with the wrong info.
Do it right the first time... or I might have to fix it for ya

Posted By: rki0003
Date Posted: March 21, 2008 at 3:13 PM

Techman thank you but i'am a little confused , What i need for you to tell me is this. I need to hook up my lights only to a switch and relay . To turn on and off the the lights with the switch . If you can get me a diagram or something i'll thank you for it . sorry for the incovinience, RKI

Posted By: techman93
Date Posted: March 21, 2008 at 10:58 PM

this is as good as I could do with my old print shop program

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The wire I'm test'n isn't doin' what it's supposed to be doin'... I am so glad I printed that tech sheet, with the wrong info.
Do it right the first time... or I might have to fix it for ya

Posted By: rki0003
Date Posted: March 22, 2008 at 10:17 PM

Techman93 you just made my day i thank you very much and if you ever need residenial central a/c or appliance technical advice all you got to do is holla back to me . Thanks again RKI

Posted By: techman93
Date Posted: March 22, 2008 at 11:17 PM

Your welcome. Remember to also ground the black wire from lights. It can be done to the same ground as relay.

Hope that made your install a tad easier.

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The wire I'm test'n isn't doin' what it's supposed to be doin'... I am so glad I printed that tech sheet, with the wrong info.
Do it right the first time... or I might have to fix it for ya