Checked all the fuses even#29 all fuses checked out ok. when turning the knob int o 4 hi or 4 low i hear a clicking noise in the dash. the indicator light on the dash doesnt come on either.also the cruise control and horn or the overdrive light does not work. any help where to start will grestly be appreciated. thanks again
Transfer Case - Electronic Shift on the Fly (ESOF) Features
A rotary switch allows the vehicle operator to choose between 2WD, 4H, and 4L modes of 4x4 operation.
The generic electronic module (GEM) controls the operation of the 4x4 system.
The output shaft speed (OSS), mounted in the rear of the transfer case, informs the GEM of the vehicle speed.
The shift motor sense plate, an integral part of the electronic shift motor, informs the GEM to the positions of the transfer case (go to Table 4).
The transmission range sensor is located on the LH side of the transmission; this sensor informs the GEM when the transmission is in the NEUTRAL position.
The electronic shift motor, mounted externally at the rear of the transfer case, drives a rotary cam which moves the mode fork and range fork within the transfer case to select between the 2WD, 4H, and 4L positions.
The 4x4/4x2 vacuum solenoids are attached to the upper RH side of the engine compartment, and alternately route vacuum to the vacuum motor which engages/disengages the center axle disconnect collar in the front axle assembly.
The 4x4 shift motor relay is a module containing two relays. Under the control of the GEM, the 4x4 shift motor relay shifts the transfer case shift motor between the 2WD, 4H, and 4L modes.
The transfer case clutch relay is an electromechanical relay used to activate the transfer case clutch within the transfer case.
Your best bet , take it to a qualified repair shop !
P1804
Transmission 4-Wheel Drive High Indicator Circuit Failure
GEM
REFER to Section 413-01A .
P1806
Transmission 4-Wheel Drive High Indicator Short Circuit to Battery
GEM
REFER to Section 413-01A .
P1812
Transmission 4-Wheel Drive Mode Select Circuit Failure
GEM
REFER to the Symptom Chart.
P1815
Transmission 4-Wheel Drive Mode Select Short Circuit to Ground
GEM
REFER to the Symptom Chart.
P1820
Transmission Transfer Case Clockwise Shift Relay Coil Circuit Failure
GEM
GO to Pinpoint Test A .
P1822
Transmission Transfer Case Clockwise Shift Relay Coil Short Circuit to Battery
GEM
GO to Pinpoint Test A .
P1824
Transmission 4-Wheel Drive Clutch Relay Circuit Failure
GEM
GO to Pinpoint Test E .
P1826
Transmission 4-Wheel Drive Low Clutch Relay Short Circuit to Battery
GEM
GO to Pinpoint Test E .
P1828
Transmission Transfer Case Counter Clockwise Shift Relay Coil Circuit Failure
GEM
GO to Pinpoint Test A .
P1830
Transmission Transfer Case Counter Clockwise Shift Relay Coil Short Circuit to Battery
GEM
GO to Pinpoint Test A .
P1832
Transmission Transfer Case Differential Lock-Up Solenoid Circuit Failure
GEM
GO to Pinpoint Test C .
P1834
Transmission Transfer Case Differential Lock-Up Solenoid Short Circuit to Battery
GEM
GO to Pinpoint Test C .
P1838
Transmission Transfer Case Shift Motor Circuit Failure
GEM
REFER to the Symptom Chart.
P1846
Transmission Transfer Case Contact Plate 'A' Circuit Failure
GEM
REFER to the Symptom Chart.
P1850
Transmission Transfer Case Contact Plate 'B' Circuit Failure
GEM
REFER to the Symptom Chart.
P1854
Transmission Transfer Case Contact Plate 'C' Circuit Failure
GEM
REFER to the Symptom Chart.
P1858
Transmission Transfer Case Contact Plate 'D' Circuit Failure
GEM
REFER to the Symptom Chart.
P1866
Transmission Transfer Case System Concern - Servicing Required
GEM
REFER to the Symptom Chart.
P1867
Transmission Transfer Case Contact Plate General Circuit Failure
GEM
REFER to the Symptom Chart.
P1876
Transmission Transfer Case 2-Wheel Drive Solenoid Circuit Failure
GEM
GO to Pinpoint Test C .
P1877
Transmission Transfer Case 2-Wheel Drive Solenoid Circuit Short to Battery
GEM
GO to Pinpoint Test C .
P1891
Transmission Transfer Case Contact Plate Ground Return Open Circuit
GEM
REFER to the Symptom Chart.
Inspection and Verification — Electronic Shift on the Fly (ESOF)
Verify the customer concern by operating the 2H/4x4 engagement.
Visually inspect for the following obvious signs of mechanical and electrical damage.
Visual Inspection Chart Mechanical Electrical
Switch(es)
Central junction box (CJB) Fuse 23 (10A)
Battery junction box (BJB) Fuse 104 (30A)
Damaged wiring harness
Loose or corroded connector(s)
Circuitry
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SOURCE: cruise control won't work
Does the on light in the dash come on? If not, you may have a broken switch in the steering wheel which is a fairly cheap repair. Otherwise, the controls work through the Printed Circuit Board in your dash (your instrument cluster) and the problem could be as simple as a solder defect or faulty component. The problem is that no Ford Service Technician that I know will touch this and tell you that you need to replace it.
The instrument cluster is very easy to replace but may cost you a few more dollars than you want to spend. I would have someone with an electrical background check the cruise control switches in your steering wheel with a multimeter before going any further with this. Also check the wiring for resistance leading from the switch to the cluster.
SOURCE: 2003 expedition cruise control inoperative
I had this same Problem and it was a simple vaccuum hose leak connected to the cruise control module. Try replacing this small hose.
look in your owner's manual for the location of the cruse control fuse it is different from other fuses usually much larger
SOURCE: 2003 expedition cruise control inoperative no
I'm having the same issue with mine. Just checked both fuses #5 and #12 under the dash, but both are fine. Can't find Relay #302 for the speed servo. 2003's aren't listed in the recall. Ugh!
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