I having problems with my '68 Firebird with non-rally gauges. The problems is Speedometer/fuel background lights that doesn't working right. When i pulled the head light switch on and off, it still not coming on background lights. I did replaced all light bulbs, relays, steering wheel wiring harness, etc., still nothing working for me. I took my car to the shop, nobody knows how to fixing it. I'm stuck with my speedo/fuel background lights! How can i do with it?