Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

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Control Module: Testing and Inspection

Connector Circuit Reference

4x4 Module (GEM) C281a (Part 1):




4x4 Module (GEM) C281a (Part 2):




4x4 Module (GEM) C281a (Part 3):




4x4 Module (GEM) C281b (Part 1):




4x4 Module (GEM) C281b (Part 2):




4x4 Module (GEM) C281b (Part 3):




Mode Select Switch (MSS) C284 Part 1:




Mode Select Switch (MSS) C284 (Part 2):




Transfer Case Encoder C350a (Part 1):




Transfer Case Encoder C350a (Part 2):




Transfer Case Shift Motor C350b (Part 1):




Transfer Case Shift Motor C350b (Part 2):




Pulse Vacuum Hublock (PVH) Solenoid C1247:




Shift Motor Clockwise Rotation Relay (Low-to-High) C1129 (Part 1):




Shift Motor Clockwise Rotation Relay (Low-to-High) C1129 (Part 2):




Shift Motor Counterclockwise Rotation Relay (High-to-Low) C1173: