The main harness on my 2001 z24 went so i cut one out of one at the junkyard and installed it today. Everything works good except i have no headlights. When i turn the headlight switch on the cluster lights up but then the doors unlock. if u turn it back off and on again same thing happens. Bad headlight switch would not cause this would it? Any ideas guys.

Thanks

Bad ground would cause this.

Any idea which ground is most likely?