Ford F150 Pickup. Instruction - part 309

B1476

Wiper High Speed Circuit 

Motor Failure

GEM/CTM

REFER to WIPERS AND WASHERS - F150 .

B1483

Brake Pedal Input Circuit 

Failure

GEM

REFER to TRANSFER CASE - GENERAL 

INFORMATION - F150 PICKUP .

B1485

Brake Pedal Input Circuit 

Battery Short

GEM

REFER to TRANSFER CASE - GENERAL 

INFORMATION - F150 PICKUP .

B1577

Lamp Park Input Circuit 

Short to Battery

GEM/CTM

REFER to WARNING DEVICES - F150 .

B1610 Illuminated Entry Input Short 

Circuit to Ground

GEM

REFER to INTERIOR LIGHTING - F150 .

B1840 Wiper Front Power Circuit 

Failure

GEM/CTM

REFER to WIPERS AND WASHERS - F150 .

P0500

Vehicle Speed Sensor 

Malfunction

GEM

REFER to TRANSFER CASE - GENERAL 

INFORMATION - F150 PICKUP .

P1804 Transmission 4-Wheel Drive 

High Indicator Circuit Failure

GEM

REFER to INSTRUMENT CLUSTER-

CONVENTIONAL - F150 .

P1806 Transmission 4-Wheel Drive 

High Indicator Short Circuit 

to Battery

GEM

REFER to INSTRUMENT CLUSTER-

CONVENTIONAL - F150 .

P1812 Transmission 4-Wheel Drive 

Mode Select Circuit Failure

GEM

REFER to TRANSFER CASE - GENERAL 

INFORMATION - F150 PICKUP .

P1815 Transmission 4-Wheel Drive 

Mode Select Short Circuit to 

Ground

GEM

REFER to TRANSFER CASE - GENERAL 

INFORMATION - F150 PICKUP .

P1820 Transmission Transfer Case 

Clockwise Shift Relay Coil 

Circuit Failure

GEM

REFER to TRANSFER CASE - GENERAL 

INFORMATION - F150 PICKUP .

P1822 Transmission Transfer Case 

Clockwise Shift Relay Coil 

Short Circuit to Battery

GEM

REFER to TRANSFER CASE - GENERAL 

INFORMATION - F150 PICKUP .

P1824 Transmission 4-Wheel Drive 

Clutch Relay Circuit Failure

GEM

REFER to TRANSFER CASE - GENERAL 

INFORMATION - F150 PICKUP .

P1826 Transmission 4-Wheel Drive 

Low Clutch Relay Short 

Circuit to Battery

GEM

REFER to TRANSFER CASE - GENERAL 

INFORMATION - F150 PICKUP .

P1828 Transmission Transfer Case 

Counter Clockwise Shift 

Relay Coil Circuit Failure

GEM

REFER to TRANSFER CASE - GENERAL 

INFORMATION - F150 PICKUP .

P1830 Transmission Transfer Case 

Counter Clockwise Shift 

Relay Coil Short Circuit to 

Battery

GEM

REFER to TRANSFER CASE - GENERAL 

INFORMATION - F150 PICKUP .

P1832 Transmission Transfer Case 

Differential Lock-Up 

GEM

REFER to TRANSFER CASE - GENERAL 

INFORMATION - F150 PICKUP .

 

2003 Ford Pickup F150 

2003 STEERING Steering Column Switches - F150 Pickup

  

SYMPTOM CHART 

Refer to the Wiring Diagrams for connector numbers stated in Pinpoint Tests. 

SYMPTOM CHART 

Solenoid Circuit Failure

P1834 Transmission Transfer Case 

Differential Lock-Up 

Solenoid Short Circuit to 

Battery

GEM

REFER to TRANSFER CASE - GENERAL 

INFORMATION - F150 PICKUP .

P1838 Transmission Transfer Case 

Shift Motor Circuit Failure

GEM

REFER to TRANSFER CASE - GENERAL 

INFORMATION - F150 PICKUP .

P1846 Transmission Transfer Case 

Contact Plate 'A' Circuit 

Failure

GEM

REFER to TRANSFER CASE - GENERAL 

INFORMATION - F150 PICKUP .

P1850 Transmission Transfer Case 

Contact Plate 'B' Circuit 

Failure

GEM

REFER to TRANSFER CASE - GENERAL 

INFORMATION - F150 PICKUP .

P1854 Transmission Transfer Case 

Contact Plate 'C' Circuit 

Failure

GEM

REFER to TRANSFER CASE - GENERAL 

INFORMATION - F150 PICKUP .

P1858 Transmission Transfer Case 

Contact Plate 'D' Circuit 

Failure

GEM

REFER to TRANSFER CASE - GENERAL 

INFORMATION - F150 PICKUP .

P1866 Transmission Transfer Case 

System Concern - Servicing 

Required

GEM

REFER to TRANSFER CASE - GENERAL 

INFORMATION - F150 PICKUP .

P1867 Transmission Transfer Case 

Contact Plate General Circuit 

Failure

GEM

REFER to TRANSFER CASE - GENERAL 

INFORMATION - F150 PICKUP .

P1876 Transmission Transfer Case 

2-Wheel Drive Solenoid 

Circuit Failure

GEM

REFER to TRANSFER CASE - GENERAL 

INFORMATION - F150 PICKUP .

P1877 Transmission Transfer Case 

2-Wheel Drive Solenoid 

Circuit Short to Battery

GEM

REFER to TRANSFER CASE - GENERAL 

INFORMATION - F150 PICKUP .

P1891 Transmission Transfer Case 

Contact Plate Ground Return 

Open Circuit

GEM

REFER to TRANSFER CASE - GENERAL 

INFORMATION - F150 PICKUP .

Condition

Possible Sources

Action

No communication with the 
generic electronic module 
(GEM)

z

Central junction box 
(CJB) fuse 15 (5A).  

z

Battery junction box 

Go To PINPOINT TEST A .

 

2003 Ford Pickup F150 

2003 STEERING Steering Column Switches - F150 Pickup

  

PINPOINT TESTS 

Pinpoint Test A: No Communication With The Generic Electronic Module Or Central Timer Module 

(BJB) fuse 103 (50A). 

z

Circuitry.  

z

GEM.  

Unable to enter self-test

z

Generic electronic 
module (GEM).  

Go To PINPOINT TEST B .

The ignition switch is 
inoperative

z

Battery junction box 
(BJB) fuse(s): 

z

111 (50A).  

z

113 (50A).  

z

Ignition switch.  

z

Circuitry.  

Go To PINPOINT TEST C .

No power in ACC

z

Ignition switch.  

z

Circuitry.  

Go To PINPOINT TEST D .

No power in RUN

z

Battery junction box 
(BJB) fuse(s): 

z

102 (20A).  

z

111 (50A).  

z

113 (50A).  

z

Ignition switch.  

z

Circuitry.  

Go To PINPOINT TEST E .

No power in START

z

Battery junction box 
(BJB) fuse 111 (50A). 

z

Ignition switch.  

z

Circuitry.  

Go To PINPOINT TEST F .

The multifunction switch and/or 
hazard switch does not operate 
correctly

z

Multifunction switch. 

 

REFER to the Multifunction Switch 

Component Test in COMPONENT 

TESTING - F150 PICKUP .

 

2003 Ford Pickup F150 

2003 STEERING Steering Column Switches - F150 Pickup

  

Fig. 5: Pinpoint Test A: No Communication With The Generic Electronic Module Or Central Timer 
Module (Steps A1-A2) 
Courtesy of FORD MOTOR CO. 

 

2003 Ford Pickup F150 

2003 STEERING Steering Column Switches - F150 Pickup