Sir john2k . . . .
This problem was posted in two different areas and I answered on the other one and was expecteeing a more complex circuit and responded accordingly.
If this is stock equipment on this vehicle give its make year and model so that a system wiring diagram may be consulted.
If an aftermarket add on, it needs to be identified as such.
NOW on your mirror activator procedure . . . .
The drive motor mechanically moves the mirror to either open or closed position and at EITHER extreme, that extreme limits mechanical movement runs into a limit switch which disrupts power to the motor and all power is then open circuit.
That then has the mirrror then being fully extended or folded in, accordingly.
If you press/ blip the mirror activation switch it temporarily shorts across the limit switch, and overides it so that temporary power can keep the motor runing just until the reversing switch flips and then the motor will run completely on its own until the cycle is completed and another extrenme limit switch is tripped and the same power cut off action occurs with the other limit switch .
Then a temporary mirror activation switch blip would start the complementary mirror cycle.
The simplified wiring diagrams typicalty will not be showing these switches and their wiring since they are being built within the electro mechanics and case of the mirror driver mechanism.
73's de Edd . . . . .
The chemical formula for water is HIJLKMNO . . . . . . . . . Well ? . . . isnt that being H2O ?