What was found
EMERGENCY EXIT SIGNS A THE L4 & R4 DOORS ATTACHED TO THE BATTERY CHARGER M1210 WILL NOT TEST WITH THE PUSH TO TEST SWITCHES. R & R THE BATTERY CHARGER IAW AMM 33-51. HAD A GROUND ON PIN 8M CONNECTOR D10722. TROUBLESHOT IAW WDM 33-51-11, FOUND OPEN ON WIRE W836-008-22. APPROX. 3 FEET DOWN RUN. TROUBLESHOT IAW WDM 33-51-11, FOUND CONNECTOR D10722 WIRE PIN 8 BROKEN BEHIND SIDEWALL PANEL AT THE R4 DOOR & PIN 4 WIRE DAMAGED. PERFORMED ENVIRONMENTAL SPLICE ON WIRE W836-008-22 & WIRE W836-004-22 IAW SWPM 20-30. NOW EMERGENCY LIGHT TEST FUNCTIONS. OPS CHECKED GOOD IAW AMM 33-51.