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Old December 8th, 2017, 17:06   #16
Join Date: Jul 2017
Location: Terrace, BC, Canada

So, I took the afternoon off and figured it out. It turns out to be quite simple.

1. There is a large black/red wire that supplies power for the headlights on terminal #1 of the headlight switch connector. This power comes directly from the "on with the ignition" relay, is good for something like 70 A, so a couple more amps for the running lights is not going to be a problem. All fusing is downstream of the light switch.
2. There is smaller reddish orange wire on pin 15 that supplies "always on" power to the running lights.
3. I cut the red wire on pin 15, and with extra wire, butt splices, bullet connectors and a T-tap, jumpered power from the black/red wire to terminal 15. I left it set up so I can unplug a bullet connector and reconnect it the way it was, if I ever decide I want to go back to "normal".

It works just fine. I can leave the light switch on, and the headlights and running lights go on and off with the engine.

As a bonus, I now have a spare "always on" pwoer source, if I want to add some electrical accessory.

The headlight switch is shown on wiring diagram 51/13 in the Bentley manual.
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