What was found
THE FRONT EMERGENCY BATTERY PACK IS DEAD. WITH BATTERY SWITCH ON AND EMER LIGHT SWITCH ON, ALL EMERGENCY LIGHTS CHECK NORMAL. TURNING THE BATTERY SWITCH TO OFF, THE FRONT EMERGENCY LIGHTS DO NOT ILLUMINATE. T2PL6D00DP743- REMOVED FRONT EMERGENCY BATTERY PACK AND INSTALLED REPAIRED FRONT EMERGENCY BATTERY PACK IAW MM 33-50-01. EMERGENCY BATTERY PACK REPAIRED. OPS CHECK FAILED. TROUBLESHOT WIRING, & SWITCH, FOUND DIODE D1051 FAILED. REMOVED THE DIODE AND INSTALLED A NEW DIODE IAW SPM 20-30-25, AND WDM 33-50-01. OPS CHECKED GOOD.