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So basically I wanna install a logo projector on the back side of my motorcycle and I'm really new at all this stuff. So I am thinking of taking the positive wire from the backlight since it is always on (AHO) but should I do that? Also I will mount the switch on handlebar so I have to connect a long ass wire but do I have to take off the tank and seat for that or is there another way? And btw I have Bajaj Avenger 220 street

user57606
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Does your projector draw more than 5 amps current? Then it might be too much for the back light circuit. Pick a stronger circuit like head lamp and, first thing, put in an inline fuseholder for a 10 amp fuse. Then wire to the switch and a 1-wire back to the projector. The projector ground wire needs a solid connection to the metal frame.
If you take the power from the back light, first use a fuseholder. Run a sturdy 2-wire up to the switch up front. The switch return goes to the projector and then to ground.
To fish the wire under the tank I use an old long flexible transmission dipstick with the handle cut off. Feed the dipstick from back to front until it comes out where you want it. Tape the wire to it and pull it through. Be sure the wire has no pinch points. Secure with tie straps as much as you can. Feed the front end of the wire up to the switch. Feed the back end to your device.

John Canon
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  • The projector takes about 2 watts so that's like 0.2 amps so I think it's gonna be ok if I connect it to backlight, right? – user57606 Jan 16 '19 at 09:55
  • Backlight is powered whenever the motor is running, right? It looks like there is enough power. So connect the projector hot wire to the backlight, but with a switch between. Fish a 2-wire cable to the front and mount the switch. The negative side of the projector should be connected to the chassis frame. – John Canon Feb 06 '21 at 20:12