How do I wire a LED light bar to my high beams? (3 Viewers)

Content may include affiliate links. Please see terms for details.

Joined
Oct 29, 2021
Messages
60
Location
Tucson, Arizona
I am thoroughly confused by what people say that the power for the high beams is actually on the ground side(?)

Can anyone tell me what wire I need to connect the “hot” wire of my light’s wiring loom to in order to get the light bar to work only when my high beams are on?

Thanks in advance!
 

Road Apple

SILVER Star
Joined
Nov 28, 2011
Messages
1,290
Location
Santa Cruz, CA
A SwitchPro 9100 is a very clean setup for all your accessories in a small package. Not the cheapest way to go however.

It’s not difficult to connect the light bar. Here’s a video to help. I like the 3 position switch they use to allow independent option of the light bar.


44DA2AA7-AF5C-4E74-B375-46B9943D6588.jpeg


EDD0B8B1-2897-47BE-A0FD-77553DAE21BD.jpeg


89F1B4AF-86AB-4759-9813-CC4C2313A23F.jpeg
 
Last edited:

Road Apple

SILVER Star
Joined
Nov 28, 2011
Messages
1,290
Location
Santa Cruz, CA
This thread is for the 80-series.

 

Road Apple

SILVER Star
Joined
Nov 28, 2011
Messages
1,290
Location
Santa Cruz, CA
Here’s another 80-series thread on the subject.

 
Joined
Dec 8, 2006
Messages
11,102
Location
New Jersey
Website
www.sdsysdesign.com
I am thoroughly confused by what people say that the power for the high beams is actually on the ground side(?)
You are confused because that's not how it works.
The high beams are a switched ground. There is +12 feeding one side of the high beam lamps and they are activated by grounding the other side through the stalk switch.
This is all explained in the factory service manual and EWD which you can download from the resources section.
 
Joined
Feb 7, 2015
Messages
1,110
Location
Eastern Washington
You need to add a relay. Hook it up as normal except pull the ground from the ground wire up near the headlight. When you trigger the lights it will close the ground and cause your relay to activate turning on the light bar. Run the trigger wire (normally use 12v+) for the relay to a switch in the cab so you can override the light bar being on/off when the high are on.
 

Users who are viewing this thread

Top Bottom