I have a general idea of what the wiring diagram should look like. I have the switch... I just need to know waht kind of signal the lights are expecting. Since the level motor connector is only 3 wires I assume it is

1 Ground
2 +12v
3 signal wire (possibly 0-12v, 12v for highest light position, then 9v for position 1, 6v for position 2, and 3v for position 3)

can anyone else confirm this?

nismo240

 

I have successfully installed the level switch on my uk300's. The following explaination is for the connection of the 4 or 6 pin level switch to a 3 wire level system (EURO spec).

All you need is the switch. There are three wires on the headlight level motor.

Black = Ground
White/Red = +12V
I spliced into the headlamp wires to get power and ground.

The third wire is the level wire. You need to pull this connection to ground through a resistor to get the headlights to adjust up and down. If you have the 4 wire Euro switch all you need to do is connect the RED level wire from the headlights to the switch. The 4 connector switch has:

(cant remember exact pinout, for explaination purposes only)
1 - Power
2 - Ground (Power and ground are used to illuminate the switch)
3 - In/Out signal
4 - In/Out signal

If you measure the resistance across 3 and 4 while you change the switch position you will notice the resistance change. Hook the RED level wire from the headlight to pin 3 or 4 on the switch. Then connect the other pin to ground. This will pull the level wire (RED) to ground through the resistor.

That is the simple way to make it work. I had the 6 pin STI J-spec switch and still managed to make it work. The 6 pin switch is:

(cant remember exact pinout, for explaination purposes only)
1 - Power +12V
2 - Ground
3 - switch position 0
4 - switch position 1
5 - switch position 2
6 - switch position 3

The normal operation of the 6 pin switch is, pin 1 and 2 provide power for illumination. +12V is then routed to pins 3 through 6 depending on switch position. Since I needed to pull the level wire to ground, pin 1 became my ground and I did not power the switch. Because of this my switch does not illuminate. I then soldered resistors (I actually used pots so I could fine tune the positions) onto the pins 3 - 6. Not sure of the exact resistance but here are rough estimates.

3 - 2200 Ohms
4 - 1000 Ohms
5 - 750 Ohms
6 - Open circuit

I tied all the ends together and then connected them to the level wire.

Open circuit - headlights pointed full up
2200 Ohms - a little lower
1000 Ohms - even lower
750 Ohms - lowest setting

nismo240