B4000 SE Cab Plus 2WD V6-4.0L OHV (1998)
Power Mirror Switch: Testing and Inspection
Use an ohmmeter to check for the continuity between the given terminals of the following table for the side that is not operating correctly.
Left Mirror
Right Mirror
If the resistances are less than 5 ohms, return to the diagnostic test. Otherwise, replace the outside rear view mirror switch.