W T E C I I I E L E C T R O N I C C O N T R O L S T R O U B L E S H O O T I N G M A N U A L
Internal Wiring Harness (Figure 18)
The internal wiring harness provides connection between the external harness, the pulse width
modulated solenoids, oil level sensor, C3 pressure switch, and the temperature sensor.
Figure 18. WTEC III Internal Wiring Harness
VEHICLE INTERFACE MODULE (Figure 19)
The vehicle interface module (VIM) provides relays, fuses, and connection points for interface with the output side
of the vehicle electrical system. VIMs are available for both 12V and 24V electrical systems. The VIM for 12V
systems uses all 12V relays. The VIM for 24V systems has all 24V relays. Refer to the Parts Catalog for the
transmission assembly number that you are servicing for detailed parts information. Refer to Pages D23 and D24
for VIM wire number and terminal information.
Some OEMs may provide their own equivalent for the VIM which performs the same functions as the VIM shown
in Figure 19.
Figure 19. Vehicle Interface Module (VIM)