I had the same problem on my Gz.
I can't remeber exactly what i did though.... damn have to get off my ass and go out to the car..&(&(&^%^^%$%$.
You have to find the wire that send the power to the lights, from the auto loom and an earth. Mine had the lights in the dash to tell me when i had located the correct wires.
Cambelt, helped me out with mine, I suck at electricals.
Even if i didn't help, email Cambelt. heheh well i tried!