Ford F150 Pickup. Instruction

Fig. 7: Identifying Instrument Cluster Components Locations - Lighting Only (2 Of 2)
Courtesy of FORD MOTOR CO.

DIAGNOSIS AND TESTING

INSTRUMENT CLUSTER

Refer to INSTRUMENT CLUSTER for schematic and connector information.

Special Tool(s)

2003 Ford Pickup F150

2003 ACCESSORIES AND BODY, CAB Instrument Cluster-Conventional - F150 Pickup

The instrument cluster (10849) receives the vehicle speed signal from the powertrain control module (PCM)
(12A650) over the standard corporate protocol (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 instrument cluster receives the fuel level information directly from the fuel sender. When the instrument
cluster fails to receive the fuel level signal for more than 33 seconds, then the fuel level gauge will move below
E (empty). If the fuel level signal then operates correctly for more than 33 seconds, the fuel gauge will return to
the correct position.

Fuel fills of less than 22.7 liters (6 gallons) require at least 5-20 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. Temperatures over 121 °C (275°F) will display hot (H). If the engine coolant temperature data is
missing or invalid for five seconds, the instrument cluster will move the engine coolant temperature gauge
below the cold (C) position.

Boost Pressure Gauge (Lightning only)

The boost pressure gauge on the instrument cluster receives the boost pressure status directly from the intake
manifold. The boost pressure gauge will display three conditions: boost pressure with acceleration, vacuum
pressure at idle, or 0 pressure at consistent engine load and rpm.

Odometer

The instrument cluster receives odometer rolling count status from the PCM and stores the mileage in non-
volatile memory (NVM). When the instrument cluster fails to receive the odometer rolling count status for more
than two seconds, the odometer display will show dashes.

Low Oil Pressure Indicator

The low oil pressure indicator on the instrument cluster receives the oil pressure status directly from the oil
pressure switch. The two-position oil pressure gauge will display either normal or no oil pressure. The low oil
pressure indicator will prove out when the ignition switch is placed in the START position and then in the RUN
position.

Brake Warning Indicator

The BRAKE indicator will prove out when the ignition switch is placed in the START and then in the RUN
position. The BRAKE indicator will also be illuminated when the instrument cluster receives a ground signal
from the parking brake switch or the brake fluid level switch.

Safety Belt Indicator

2003 Ford Pickup F150

2003 ACCESSORIES AND BODY, CAB Instrument Cluster-Conventional - F150 Pickup

Ford F150 Pickup. Instruction - part 59