Toyota T100 1996 Service Manual page 1893

BE−58
1996 TOYOTA T100 (RM449U)
BODY ELECTRICAL − POWER MIRROR CONTROL SYSTEM
(c) Connect the positive (+) lead from the battery to terminal
2 and the negative (−) lead to terminal 1. Check that the
mirror turns upward.
Z04654
(d) Reverse the polarity, that the mirror turns downward.
If operation is not as specified, replace the mirror assembly.
Z04382