I added some after market driving lights on my 1995 Maxima SE. They worked for years with a couple of bulb replacements. I wired them to work with my parking lights using a switch. One day they just stopped working. No fuses blown, parking lights come on, and the switch works but no driving lights. How do I diagnose this without ripping out the wiring? Any help or suggestions would be appreciated.

 

Tried checking with a circuit tester with no luck. Looks like I will have to take it to an alarm shop to see if they can diagnose it.