S15/T15 4WD P/U V6-262 4.3L VIN W CPI (1992)
POWER, CIRCUIT PROTECTION, AND GROUND
The Transfer Case Control Module (TCCM) memory power, system power, and the ground circuit are shown in Figure 1. The vehicle fuse block
and cavity location for memory power, system power, and motor power are shown in Figure 2.
Memory Power
Trouble code memory power is protected by a 5-amp TCCM fuse. Memory power is supplied to TCCM connector pin C6 through circuit 140.
System Power
Operating power is controlled by the ignition switch and is protected by a 15-amp radio fuse. System power is supplied to TCCM connector pin
C8 through circuit 141. This fuse also supplies, voltage to pin B of the transfer case switch. The system power will shut down if either the 5-amp
TCCM fuse or the 15-amp radio fuse are removed or blown.
System Ground
System ground is supplied to TCCM connector pin C10 through circuit 150. Circuit 150 is connected to the bus bar ground located on the left side
of the steering column support. Refer to Figure 1.
Turn/BU Fuse
A 15-amp TURN/BU fuse supplies ignition voltage to the park/neutral position switch. This voltage enables the park switch to send a park signal
to TCCM connector pin D2.
Power Accessory Circuit Breaker
The 30-amp power accessory circuit breaker supplies ignition voltage to TCCM connector pins D14 and D15. This voltage is used to control the
electric-shift motor circuit.
