What was found
BFM - C19 - EEL - WITH EMERGENCY EXIT LIGHTS SWITCH ON THE P5 PANEL TO THE ARM POSITION, ALL EMERGENCY LIGHTS ALWAYS "ON". PERFORMED TROUBLESHOOTING BY CHECKING 28DV VOLTAGE AT EMERGENCY EXIT LIGHT SWITCH IAW WDM 33-51-1, NO VOLTAGE FOUND D419 OP, PLUG CONNECTOR LOOSE, TIGHTENED & SECURED TEST IAW B737 AMM 33-51-02.