Pin Point Test A: No Communication With The Instrument Cluster

WARNING: This page is about a different car, the 2006 Ford F550 Super Duty, 2006 Ford F450 Super Duty, and 2006 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.

CAUTION: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

A1 CHECK THE INSTRUMENT CLUSTER VOLTAGE SUPPLY

Key in OFF position.
Disconnect: Instrument Cluster C220a, C220b.
Key in ON position.

Measure the voltage between the instrument cluster, harness side and ground as follows:

INSTRUMENT CLUSTER CONNECTOR-PIN REFERENCE

Instrument Cluster Connector-Pin	Circuit
C220a-13	640 (RD/YE)
C220a-22	1002 (BK/PK)
C220b-19	3049 (BK/LG)

Are the voltages greater than 10 volts?

Yes : GO to A2.

No : VERIFY the central junction box (CJB) fuse(s) 2 (10A), 33 (15A), and 45 (10A) are OK. If OK, REPAIR the circuit in question. TEST the system for normal operation.

A2 CHECK CIRCUITS 57 (BK) AND 676 (PK/OG) FOR AN OPEN

Key in OFF position.

Measure the resistance between the instrument cluster, harness side and ground as follows:

INSTRUMENT CLUSTER CONNECTOR-PIN REFERENCE

Instrument Cluster Connector-Pin	Circuit
C220a-10	57 (BK)
C220b-12	676 (PK/OG)

Are the resistances less than 5 ohms?

Yes : REFER to MODULE COMMUNICATIONS NETWORK to continue diagnosis of the communication network.

No : REPAIR the circuit in question. TEST the system for normal operation.