[LordBronz]

I want to re-route my Hella 500's so that they turn on with my high beams. Where exactly do I run my power wire to though?

[XJMuscle98]

If you're not using an illuminated switch, you can just the switch wire from the relay power wire, well you can do it using an illuminated switch, but don't ground the switch, fused of course.

[Carves]

In the diagram above .....

The red wire from the switch could go to a factory high beam wire instead.

That would give you Hi beam control over the lights ... when the switch was turned on.

[xjfever]

I believe the question was where to tap into the high beam wire.

[Islandroaddie96]

I just tapped into the driver's side headlight harness and ran a wire to the relay that controls my bumper lights (ie - the high beam triggers the relay just as the switch does). I forget the wire color, but you can use a meter to find out which one it is in the harness (there are only three - hi, lo and ground). On my XJ, the headlight harnesses quickly disappear into larger harnesses, so it's much easier to tap into it near the sockets.

You have to put a diode on the new wire you run or else when you turn on just your bumper lights, the current will back feed from the relay into the high beams and since that part of the circuit is not supposed to carry a high load, you will either blow a fuse or fry something.

[Greenz]

Originally Posted by xjfever

I believe the question was where to tap into the high beam wire.

Thats how I took it too.

High beam wire voltage can be found using a test light at your high beam switch. Alternatly switch high beams on and off to verify.

You will need a relay to power the Hellas. Can be wired as in the above example except: use the high beam wire to the relay where the tan wire attaches from the switch and forget the red wire from battery to switch.

I would use an additional switch rather than just the high beam on switch. In which case using the above drawing: use the high beam wire you located to power the switch not the red from the battery to the switch.

The power wire for the Hellas attaches to the relay where the green wire is shown.