Toyota Hilux Surf 1993 Owner's Manual page 68

MANUAL TRANSMISSION –
(b) Remove the output shaft, from the intermediate
plate by pulling on the output shaft and tapping on
the intermediate plate with plastic hammer.
27. INSPECT BACK–UP LIGHT SWITCH
Check that there is continuity between terminals as
shown.
If operation is not as specified, replace switch.
Disassembly of Transmission
Switch Position
Push
Free
MT1–37
Specified
Continuity
No continuity