Pinpoint Test A: No Communication With The Instrument Cluster

WARNING: This page is about a different car, the 2005 Ford Pickup, 2005 Ford F550 Super Duty, 2005 Ford F450 Super Duty, and 2005 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.

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 SPECIFICATION

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

Are the voltages greater than 10 volts?

Yes : GO to A2.
No : REPAIR the circuit in question. CLEAR the DTCs. REPEAT the self-test.

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 SPECIFICATION

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. CLEAR the DTCs. REPEAT the self-test.