Driving light switch wiring query

[Ovets]

I recently purchased some driving lights that came with a wiring harness.

The lights work fine but the harness came with a round dash switch:



I want to use a rectangular switch so it fits the dash better. The thing is that the rectangular switch I got has 4 wires whereas the round switch only has 3.



Is anyone able to advise which coloured wires on the rectangular switch match with which wires on the round switch? Is it as simple as matching red, blue and black and ignoring green? There's obviously a spare wire there for whatever reason.

Any advice would be awesome.

[Keithyv]

Probably only 2 of the wires are needed anyway.
Get yourself a multimeter and work out what 2 wires are closed circuit (connected) when the switch is in its desired on position.

As shown the round switch will likely connecting the red and black together, and when thrown to the other position will join red & blue.
Is that rectangular switch one that latches on and off or is it just a momentary switch?

Bottom line no, it would not just be a matter of matching the colours!

[NWDarwin]

One will be earth (1 cathode) one will be incoming active (4 anode input), one will be switched active (3 anode output) and the other one is 12v from dash lighting, for the backlighting (2 connect to anode). Like already mentioned, the easiest way to work out which is which is to get a multimeter to check which wires are shorted when the switch is depressed.

Hopefully the picture uploaded.

[Ovets]

The switch is this Mitsubishi style (although its not genuine):







When you push the button in it detents a little and stays in; then when you turn the switch off it "pops" back out again.

[Ovets]

I stumbled across this wiring guide for a similar Narva switch:




I'm assuming the wiring would be the same but will double check with the multimeter.