2000 Mazda Protege ES dashboard light problems?
 

Hello all,

I'm having a problem where the dashboard lights are on when I start the car, but when I turn on the headlights the dash lights stop working.
I have checked the dash dimmer switch, but it doesn't seem to work. I haven't checked any of the fuses but they seem to be in working order.

Also of note is there is an aftermarket radio installed. I heard that bad wiring can mess up some lights, but I'm not sure if the wiring is the problem is the dash lights only stop working after I turn the headlights on.

Thanks for any help

PS: I have posted this on another forum.