Remove control switch from vehicle. Using an ohmmeter, check continuity between specified terminals while operating switch in each position. See Fig 1
-Fig 3
.
If the control switch does not test as described, replace switch.
Fig 1: Testing Power Mirror Switch (Trooper - 1 Of 3)
Courtesy of ISUZU MOTOR CO.
Fig 2: Testing Power Mirror Switch (Trooper - 2 Of 3)
Courtesy of ISUZU MOTOR CO.
Fig 3: Testing Power Mirror Switch (Trooper - 3 Of 3)