METHOD OF ASSEMBLING MIRROR REFLECTIVE ELEMENT SUB-ASSEMBLY FOR EXTERIOR REARVIEW MIRROR ASSEMBLY

A method for assembling a mirror reflective element sub-assembly for a vehicular exterior rearview mirror assembly includes assembling an indicator module by heat staking a printed circuit board at a receiving part of a housing to form a housing and printed circuit board assembly and dispensing potting material at the printed circuit board to seal the printed circuit board at the housing and aligning and taping a diffuser at the housing. A back plate is provided that has an indicator attaching portion for attaching the indicator module. The back plate is placed at a support fixture and a mirror reflective element is attached at the back plate. The indicator module is attached at the indicator attaching portion of the back plate. Light emitted by the indicator module, when electrically powered to emit light, passes through the mirror reflective element at an aperture of the back plate.