I have a 1994 FLSTN with aftermarket passing lamps on it (Custom Chrome I believe). As I get my bike ready to ride this season I noticed the passing lamps are not working. all other lights on the bike work. Looking to see if anyone may have a wiring diagram or point me in the direction to obtain one. Also any advice in troubleshooting this issue. thank you.

Genghis

 

Since they weren`t installed by the factory, a wiring diagram may not help in this case.

But the factory would have connected the wires for the lamps into the switch, and the switch would get its power from the low beam circuit (yellow wire).

You should find the wires underneath the tin fork cover behind the headlamp.

The factory service manual will contain a wiring diagram. Best money you can spend on the bike.

 

If I had added those lights, I would have used a lighting relay, suitable fused, to take power direct from the battery, but switched from the ignition switch, or convenient switched circuit. So another possibility is to look at your battery wiring, to see if there is any additional wiring, then follow it.