Why aren't the buttons lighting up on my Rockford Fosgate source unit?

I have an RFX-8030/8120/8130/8140 source unit, but the backlighting behind the buttons doesn't work. What should I do?

All RFX-8030, -8120, -8130, -8140 (except RFX-8115) decks have a separate wire for the backlighting. The wire is orange (not orange/white) in color and must be connected to a source of (+12) Volts to engage the backlighting of the deck. It can be connected to the radio remote output "A" (light blue), if you prefer the backlighting on whenever the radio is on. If you prefer backlighting only when the cars lights are on, you can connect the orange wire to the cars (+12) Volts dash light wire or parking light wire, just be sure the wire is a source of (+12) Volts and not (-12) Volts.