center console switch lighting: trial and error

[ACCORDianate]

Ok, since I have switches such as a JDM half-mast switch and heated seat switch, and a headlight washer switch and 2 of 3 with no wiring harness, I'm going to do a trial and error with the pins on the back to find which pin combination allows the switch to illuminate, but what would be the best way to do it without potentially blowing fuse after fuse? Have some sort of test light, run a splice or two off an another accessory light to test, or would a 9volt battery and some wires be enough to light up the teeny-tiny bulb?

[accordztech]

how many wires are on the harness?

is it working normally like it turns on and off the unit that you are doing?

...so how many wires are left over and not used?

[ACCORDianate]

I have zero wires for 2 switches, and the one switch with wires is still on its way over the Pond from the UK.

[swassheefry]

a 9 volt should have enough power, b/c all thats in that switch is a led probably and in my electronics class we used 9 volt batteries to run all of our experiments and they have 5 or 6 leds in them

[ACCORDianate]

Perfect! A 9V worked like a charm. They're tiny little bulbs that are in there- no LEDs.

Now I just have to hard-wire it and I'll have an illuminated switch.