I'm adding driving lights to my '06 Liberty, have 'em mounted and wired to a relay with power. All I need now is to wire the relay to the high beams, so they're activated with the regular high beam switch. Easy enough, so far.
My plan was to jump the relay "switch" wire to the high-beam terminal on one of the headlamps. But it turns out there's a problem with this, in that its setup with daytime running lights (I'm in Canada), which use the high-beam filament on low power for DRL. So there's always a "live" on the high beam terminal...
So I scratched my head and came up with Plan B. This is originally a US vehicle, converted to use DRL when imported to Canada, which I believe involves removing the High Beam Relay, inserting a low beam relay, and programming the control module appropriately. So I reckoned there should still be a "switch" live on one of the contacts in the Junction Box where the High Beam Relay used to live. So I tested them out, there are 5 slots (3 vertical, 2 horizontal). According to the wiring diagrams, contact 86 (vertical nearest rear of the vehicle) should be the one that switches the relay. But I found it's live, even with the vehicle off and no lights on, as are 4 of the other 5 slots (the last being earthed). One of the slots' voltage *drops* when I flash the lights, so it looks like the system switches the relay by *removing* live, rather than adding it. So there goes Plan B.
My plan C was to go direct to the steering column switch, I believe White/Lt Green is the wire for high beam. But thinking about it some more, this is just a contact switch, it has no clue whether the lights are on high or low beam. (And I don't want to have to hold the stalk all the time while I'm driving at night :-)
I really would prefer to have these synced with my regular high beams, but am running out of ideas. Does anyone have any clues where I might find a "live" which is only "live" when the high beams are on?
Thanks!
/M