High beam Lead for FZJ80 (1 Viewer)

[Manuelsv]

So ... I was trying to wire up my high beams tru a relay so that they would trigger my Bumper LED lights,
right now they are wired with a switch and relay in the cab. (Standard Setup)

When I did my backup lights. I used a Diode on the + lead I got straight from my backup circuit so I can use the in cab switch and turn them on.. Or.. they come on when I put it in reverse triggered by the stock backup lights circuit, Diode keeps current from flowing back to the OEM backup circuit....

So I thought I would do the same for my front bumper LED lights triggered by my high beams easy peasy.. Right?

Well I took out my high beam bulb.. Used my 12V tester to see which side was hot when I flashed my high beams.. and to my surprise both leads on to the bulb turn on my light tester Scratching my head going WTF??? .. I decided to see about the low beams so I unplugged the low beam put my tester on the plug.. and as I expected one side no juice one side juice when I turn on my lights..??? So what gives? Are the high beams wired in some strange way? And more importantly where can I get a lead to trigger my LED bumper lights when I turn on my high beams?

I must add my lights both low and high beam work just fine.. So what's the deal with the high beam circuit?

97 FZJ80 Stock headlights harness.. unmolested.. and work just fine..

 

[bloc]

The Red/Blue (left) and Red/White (right) are the +12v wires for the high AND low beams, the Red/Yellow are the ground wires for the high beams, White/Black are the grounds for the low beams. When you turn on the headlights at all (low or high) it switches the headlight relay on, and this provides the +12v to each headlamp assembly. Control of the high beams is provided by the high-beam stalk completing a circuit to ground for the high-beams. (Red/yellow wire)

Probably the reason you are seeing +12v on the ground side is the high-beam indicator in the instrument cluster. Once the switch completes the ground circuit to turn on the high beams, it also completes the circuit for the indicator bulb. The +12v for this indicator bulb is provided from the 15A Head RH (right) fuse, and likely feeding back to your headlamp harness plug as you test the voltage.

So to test whether this is actually the case, try pulling the Right Headlight fuse, and see whether the Red/Yellow wire on the left headlamp still has +12v