A driver can adjust the electric mirrors from the left door inside switch. Where there are dual power mirrors, each mirror has a heater grid integrated into it to thaw fogged or iced up ones. If a heater grid goes bad, replacement of the mirror is necessary. The heater grids and the related parts with switches and indicator lights are one of those found on the dashboard together with other air conditioning panels as well. Just in case any of these components fail, it will be necessary for someone to replace the whole control assembly. The heated mirror
Relay can be located in the engine compartment fuse and relay box. The mirror control switch includes a LEFT-RIGHT selector switch which helps adjust both mirrors. While waiting for sound of electric motors running in the mirrors, operate through all functions for both mirrors with ignition at ACC position. If you hear noise from within but no movement takes place on its glass; then, change your mind about a drive mechanism gone wrong that might necessitate its replacement. If they make no response and there isn't any noise arising from them then you have to verify whether its fuse is okay or not by making a quick check at engine compartment fuses. Whenever that looks okay then remove door panel enough to access at back side of mirror control switch where upon repair process should follow after confirming voltage actually present at switch by testing continuity with multimeters while checking for open circuit on wiring where none exists so far up to this point as voltage level ought to be there even when absent such that otherwise depending on what was observed earlier, replacing faulty units becomes imperative next step until everything is put back together again before opting out as last straw could involve suspecting ground connection meant exclusively whereas trying know definitely anything else learned without certainty if possible still missing something seemingly apparent because entire matter remains doubtful therefore priority taken toward rechecking exact points accordingly under circumstances such as mention during final test when true results would show if indeed finding others especially whom immediately. At first, check voltage at the mirror, and if none is present test them with lead-acid battery outside vehicle in order to find out if they need replacing.