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

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

Or, hide this message: temporarily or permanently

Information Bus: Service and Repair

NOTE: If either circuit 914 or circuit 915 is repaired or replaced without following the proper repair procedure, the operation of the Multiplex Communication Network will be degraded.

Circuit 914 and circuit 915 must be twisted at a rate of 33-40 twists per meter (3.3 feet) anytime replacement of either circuit is required. The twist must be within 10 centimeters (4.9 inches) of any connector termination point.

The conductor for circuit 914 and circuit 915 must be No. 20 AWG wire.