This is the information that ford give and describes the cluster from key on to start to tell if there is a problem. Hope this helps.

NOTE: A new instrument cluster must be reconfigured. Refer to Module Communications Network (Information Bus).

The Instrument Cluster Module (ICM) is a Hybrid Electronic Instrument Cluster (HEC) . The instrument cluster uses both hardwired and the Standard Corporate Protocol (SCP) communication network to transmit and receive information. As a technician it is very important to understand:

• where the input originates from.
• all information necessary in order for a feature to operate.
• which module(s) receive(s) the input or command message.
• does the module which received the input, control the output of the feature, or does it output a message over the SCP network to another module?
• which module controls the output of the feature.

The instrument cluster carries out a display prove-out to verify that the warning/indicator miniature bulbs for monitored systems are functioning correctly. When the ignition switch is in the ON position with the engine off, the following warning indicators will prove out:

• Anti-lock Brake (ABS) warning indicator
• air bag warning indicator
• BRAKE warning indicator
• charge system indicator
• fail safe cooling warning indicator
• low coolant level indicator
• low fuel warning indicator
• traction control indicator

Instrument Cluster Replacement
When new instrument cluster installation is necessary, contact the Instrument Cluster Program at 1-800-259-9700.

GAUGE INDICATION SYSTEMS

Tachometer
Engine rpm information is relayed to the instrument cluster from the Powertrain Control Module (PCM) over the Standard Corporate Protocol (SCP) network.

Low Fuel Level Indicator
The low fuel level indicator is hardwired from the fuel sender to the instrument cluster. The instrument cluster will illuminate the low fuel indicator when the usable fuel quantity is less than 1/8 tank (15%) of fuel tank capacity.

Speedometer Gauge
The instrument cluster receives the vehicle speed signal from the PCM over the SCP network and displays it on the speedometer gauge. If the instrument cluster receives no vehicle speed signal after one second , the speedometer defaults to 0.0 km/h (0.0 mph ).
Fuel Gauge
The fuel sender is hardwired to the fuel gauge. When the instrument cluster fails to receive the fuel level signal for more than 33 seconds , the fuel level gauge will move below E (empty). If the fuel level signal operates correctly for more than 33 seconds , the fuel gauge will return to the correct position.

Fuel fills of less than 9.5 liters (2.5 gallons) require at least 10 minutes to update the fuel gauge indication.

Engine Coolant Temperature Gauge
Engine coolant temperature information is received by the instrument cluster from the PCM over the SCP network. Engine coolant temperatures above 121°C (250°F) will cause the gauge to indicate above the normal band. If the engine coolant temperature information is missing or invalid for five seconds , the temp gauge will indicate below the cold (C) position.

Voltage gauge
The voltage gauge displays the system voltage as measured at the instrument cluster run input.

Check Fuel Cap
The CHECK FUEL CAP indicator is used to indicate significant leaks in the fuel tank evaporative system due to a loose fuel cap. Fuel tank pressure is monitored by the PCM and if a leak is detected it signals a fault to the instrument cluster via the SCP network. Once the PCM has detected a loose fuel cap and the CHECK FUEL CAP indicator is illuminated, the indicator will remain illuminated until the fuel cap is secured and the vehicle has been running for several minutes .

Odometer
The instrument cluster receives an odometer message from the PCM and stores the mileage in memory. When the instrument cluster fails to receive the odometer message for more than two seconds , the odometer will display dashes.

Oil pressure gauge
The oil pressure gauge is hardwired from the oil pressure switch to the instrument cluster. The oil pressure gauge will indicate either normal or no oil pressure.

BRAKE Warning Indicator
The BRAKE warning indicator activates when the Generic Electronic Module (GEM) detects the ignition switch circuits are in the RUN state, when the GEM detects low brake fluid level, or that the parking brake is applied. The BRAKE warning indicator will prove out starting when the GEM detects that the ignition circuits have made a transition to RUN or START from OFF, ACC, or keyout and ending when either three seconds have elapsed or when the GEM detects the ignition circuits have made a transition to OFF, ACC, or keyout.

Safety Belt Warning Indicator
The safety belt switch is hardwired to the GEM. The safety belt warning indicator will be illuminated when the GEM sends a ground signal to the instrument cluster.

ABS Warning Indicator
The ABS warning indicator will be illuminated when the anti-lock brake control module sends a ground signal to the instrument cluster. The prove-out of the ABS indicator is controlled by the anti-lock brake control module.

SERVICE ENGINE SOON indicator
The SERVICE ENGINE SOON indicator receives its signal from the PCM over the SCP network. If the instrument cluster does not receive a message from the PCM within five seconds , the instrument cluster will illuminate the SERVICE ENGINE SOON indicator and log a Diagnostic Trouble Code (DTC) .

High Beam Indicator
The high beam indicator will illuminate when the steering column multifunction switch is in the high beam position by sending a battery signal to the instrument cluster.

Right and Left Turn Indicator
The right and left turn indicators will illuminate when the steering column multifunction switch is in either turn signal position or hazard lamps position by sending a battery signal to the instrument cluster.

AIR BAG Warning Indicator
The AIR BAG warning indicator will be illuminated when the Restraint Control Module (RCM) sends a ground signal to the instrument cluster. The prove-out of the AIR BAG warning indicator is controlled by the RCM.

THEFT Indicator
The THEFT indicator provides a Passive Anti-theft System (PATS) prove-out. The THEFT indicator will prove out for three seconds following the ignition switch cycle and will flash following an ignition switch OFF transition to indicate that PATS is active.

Charge System Indicator
The charge system indicator will be illuminated when the generator provides a ground signal to the instrument cluster. The instrument cluster provides a prove-out when the ignition switch is in the RUN position with the engine off. When the engine is started, the generator removes the ground to the instrument cluster and extinguishes the charge system indicator.

Overdrive Off (O/D OFF) Indicator
The O/D OFF indicator is controlled by the off/on message sent from the PCM over the SCP network. The instrument cluster does not provide a prove-out for the O/D OFF indicator, but will remain illuminated if the overdrive has been commanded off following the instrument cluster prove-out.

Traction Control Indicator
During initialization, the instrument cluster will receive the Traction Control (TC) system state status message to determine if the vehicle is TC equipped. If the vehicle is TC equipped, this information will be stored in Random Access Memory (RAM) and the indicator will prove out for three seconds during each ignition cycle. If this message is not received (within 500 ms ), the instrument cluster will send the request TC system state status message. If there is no response to this message after two attempts, the cluster will assume that the vehicle is not TC equipped and the indicator will remain off. When a TC event is occurring, the instrument cluster will receive a TC active command on message and illuminate the TC indicator until receiving the TC indicator off message.

In the event of a TC failure, the TC indicator will remain off and the ABS indicator will illuminate.