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Discussion Starter · #1 ·
I had a company tiddy up my wiring for a 32" OPT7 LED roof mounted lightbar.

Right now it is just tapped the current from the inside fusebox only when ignition is on, but I am getting tired of manually reaching down to the Subaru OEM fog light switch to activate it.

I'd like that source moved to the high beam so that way I can just use the high beam stalk on my steering wheel to turn LED on/off.

Is there a high beam source on that interior fusebox, or will I have to run a wire out to the engine compartment and tap there?

Thxs.
 

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'14 Subi OBW, '18 Subi Forester
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I did something like this on my old 2002 Outback.

Assuming they didn't change things over the years, hooking into the high beams as your trigger takes a little 'trickery'. It's a negative logic situation. In the off state, you'll actually find 12v on both sides of the high beam filaments. The dash stalk actually switches one side to ground so that you get a current flow thru the high beams. To make use of this, you actually have to apply 12 volts to one side of your relay coil, and use the high beam grounding to activate your aux lighting system. See if this schematic that I drew up for someone else some time back makes sense to you.

I went out to the wiring on the back of the high beam because it was actually more convenient for me than routing around under the dash and the steering column shroud looking for a place to tap. I put the relay and primary 12v battery tap right behind the headlights anyhow, so the trigger wire was right there inches away.
 

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Discussion Starter · #3 ·
I did something like this on my old 2002 Outback.

Assuming they didn't change things over the years, hooking into the high beams as your trigger takes a little 'trickery'. It's a negative logic situation. In the off state, you'll actually find 12v on both sides of the high beam filaments. The dash stalk actually switches on side to ground so that you get a current flow thru the high beams. To make us of this, you actually have to apply 12 volts to one side of your relay coil, and use the high beam grounding to activate your aux lighting system. See if this schematic that I drew up for someone else some time back makes sense to you.

I went out to the wiring on the back of the high beam because it was actually more convenient for me than routing around under the dash and the steering column shroud looking for a place to tap. I put the relay and primary 12v battery tap right behind the headlights anyhow, so the trigger wire was right there inches away.


Thxs... didn't know about the current issue, but yeah, probably just pull a wire through to engine bay. Thxs for info.
 

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2016 Outback 2.5
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I have my lightbar tapped off the hi beam fuse located under the hood.

I have an override switch inside which disables the lightbar. I keep the lights off during the day, else the daylight running lights will trigger it also. Some folks have disabled the DRL's for that reason.
 

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Discussion Starter · #5 ·
I have my lightbar tapped off the hi beam fuse located under the hood.

I have an override switch inside which disables the lightbar. I keep the lights off during the day, else the daylight running lights will trigger it also. Some folks have disabled the DRL's for that reason.


Ah yes.. I forgot about the DRL's.. maybe that's why the shop avoided it in the first place. I do have an OEM foglight switch currently. I could still use it as you suggest, as an override to the DRLs.

Plus there will be many times I won't want lightbar on with high beams.

Thxs for info.
 

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Yep, I forgot about the DRL issue when I suggested the schematic I used on my '02. Scratch that.....
 
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