LOW FUEL STATE FOLLOWING GEAR INDICATING SYS FAILURE.

Narrative

DURING OTHERWISE ROUTINE APCH FOR LNDG; AFTER GEAR HANDLE WAS LOWERED; I NOTED THE ABSENCE OF EITHER A (RED) 'GEAR UNSAFE' OR A (GREEN) 'GEAR SAFE' LIGHT FOR THE R MAIN LNDG GEAR. I IMMEDIATELY CALLED THIS TO THE CAPT'S ATTN. AFTER A SHORT DISCUSSION; HE CHOSE TO EXECUTE A WAVEOFF. TWR TURNED US OVER LAKE MICHIGAN WHERE WE BEGAN HOLDING AND TROUBLESHOOTING THE GEAR LIGHT PROB -- FUEL WAS NOTED AT ABOUT 6000 LBS; ALT 3000 FT MSL. AFTER COMPLETING THE QRH AND CREW OPERATING MANUAL PROCS; DISCUSSING THE PROB WITH OUR COMPANY'S MAINT DEPT; AND EXECUTING A LOW APCH TO CHK GEAR POS; AND VISUALLY CHKING THE GEAR WITH THE PERISCOPE; WE DECIDED TO EXECUTE OUR APCH. AS WE COMMENCED THE APCH; FUEL WAS ABOUT 2000 LBS. WE WERE ABOUT 25-30 MI E OF MKE; WIND (AT 3000 FT MSL) APPROX 090 DEGS AT 45. WE NOTED THE FUEL WAS DIMINISHING FASTER THAN EXPECTED (GEAR DOWN; FLAPS 20 DEGS). AT ABOUT 20 MI WE RAISED THE GEAR AND FLAPS AND ACCELERATED TO 220 KTS AND DSNDED TO GET UNDER THE STRONG WINDS. WE LANDED WITH ABOUT 650 LBS FUEL REMAINING -- ONLY 150 LBS REMAINED BY THE TIME WE ARRIVED AT THE GATE. (THE GEAR CHKED NORMAL. A WIRE BUNDLE HAD BROKEN EXTINGUISHING THE INDICATOR LIGHTS).