2003 f350 4x4 dont work fuse ok relays ok shift motor replaced scanner shows rotory switch going to 4x4 hi low no indactor lights or transcase shift 6.0 diesel auto trany

Did you check voltage and ground, anywhere?
F2 16--30 amp fuse at the top, did you check that fuse for voltage? Use a test light or something, key on. Is it hot? If so, pull the run park relay, use jumper wire between cavities 3 and 5, switch side of relay, right side in diagram. The wiper should work on lo speed, depending on the problem. You should have done voltage and ground testing before replacing anything. You may be way ahead of me as far as testing? The relay has two sides, the switch side and control side, the control side needs voltage and ground to energize. The gem module ground relays based on input from wiper switch. good luck

What seam's to be the problem ? Would hate for you to replace the switch an have it not fix the problem .
The wiper's not working ? There is a whole list of thing's that could be the problem . Same for the dash light's ?
Symptom Chart Condition Possible Sources Action

• The wipers are inoperative

• Central junction box (CJB) fuse:
  • 16 (30A)
• Circuitry.
• GEM.
• Multifunction switch.
• Wiper run/park relay.
• Wiper HI/LO relay.
• Wiper motor.

• GO to Pinpoint Test A .

Hooking up a scan tool an checking for DTC'S - diagnostic trouble code's in the GEM module .
GEM Diagnostic Trouble Code (DTC) Index
GEM Diagnostic Trouble Code (DTC) Index DTC Description DTC Caused By Action B1431 Wiper Brake/Run Relay Circuit Failure GEM GO to Pinpoint Test A . B1432 Wiper Brake/Run Relay Circuit Short to Battery GEM GO to Pinpoint Test A . B1434 Wiper Hi/Lo Speed Relay Failure GEM GO to the Symptom Chart. B1436 Wiper Hi/Lo Speed Relay Coil Circuit Short to Battery GEM GO to Pinpoint Test C . B1438 Wiper Mode Select Switch Circuit Failure GEM GO to the Symptom Chart. B1441 Wiper Mode Select Switch Circuit Short to Ground GEM GO to the Symptom Chart. B1446 Wiper Park Sense Circuit Failure GEM GO to Pinpoint Test D . B1450 Wiper Wash/Delay Switch Circuit Failure GEM GO to the Symptom Chart. B1453 Wiper Wash/Delay Switch Circuit Short to Ground GEM GO to the Symptom Chart. B1458 Wiper/Washer Pump Motor Relay Circuit Failure GEM GO to Pinpoint Test E . B1460 Wiper/Washer Pump Motor Relay Circuit Short to Battery GEM GO to Pinpoint Test E . B1466 Wiper Hi/Low Speed Not Switching GEM GO to Pinpoint Test C . B1467 Wiper Hi/Low Speed Circuit Motor Short to Battery GEM GO to the Symptom Chart. B1473 Wiper Low Speed Circuit Motor Failure GEM GO to the Symptom Chart. B1476 Wiper High Speed Circuit Motor Failure GEM GO to the Symptom Chart. B1840 Wiper Front Power Circuit Failure Open/Short to Ground GEM GO to Pinpoint Test A . - All Other DTCs GEM REFER to Section 419-10.
The multifunction switch has nothing to do with the dash light's
Instrument Cluster and Panel Illumination The instrument cluster and panel lighting system is powered through the headlamp switch and the panel dimmer switch. The instrument cluster illumination is controlled by the output of the panel dimmer switch. The instrument panel lighting circuit provides illumination for the:

Have you done a Probe Test on the vehicle? A Probe Light Tester can help you locate a short in your cars electrical system. To learn what a Probe Tester is and How to use it, watch the following video: https://www.youtube.com/watch?v=tXzKcEyIOq8

FUSE/FUSE RELAY BLOCK/ OR SHIFT MOTOR// START WITH FUSES AND THEN RELAY BLOCKS. AND THEN SHIFT MOTOR LAST.. GO TO A PICK AND PULL SCRAP YARD FOR THE SHIFT MOTOR AND RELAY BLOCKS..

Check the 4X4 switch with a scanner if that is ok check the motor at the transfer case if theres power and ground replace the motor also check the bcm.

Sounds like a relay to me.

I believe that this is what you are looking for.....
Fuse and relay locations--2nd generation power distribution box Layout- I think this is a good sticky candidate--



Fuses are listed here

* = maxi fuse

1*=50A I/P fuse panel
2*=40A blower motor relay
3*= 50A 4 wheel ABS module
4*=20a Main light switch-Instrument cluster
5*=50A Ignition switch, starter relay

6*=20A Transfer case relay
7*= NOT USED
8*=20A Auto Ride Control Switch/on off switch
9*=40A Auto Ride Control relay
10*=30A PCM power relay

mini fuses
1=10A A/C relay
2=20A Aux power point
3= not used
4=15A Fog lamps-Daytime lamps
5=10A Air Bag diagnostic monitor
6=10A Powertrain Control Module (PCM)
7=30A 4WABS module
8=30A PCM relay
9=20A Fuel Pump relay and RAP module
10= 15A Horn relay
11=15A Park Lamp relay-Main Light Switch
12=30A Main light switch--Multi Function switch
13=15A Heated O2 sensors, EGR Vacuum Regulator, EVR solenoid,Camshaft position (CMP) Sensor,
Cannister Vent Solenoid, A4LD Auto Transmission
14=30A Generator-Voltage regulator


Interior fuse panel (mini fuses)

1=7.5A Power mirror switch
2=7.5A Blower motor relay,PAD module,Air Bag diagnostic monitor
3=7.5A Trailer tow connector
4=10A Left headlamp
5=10A Data link connector (DLC)
6=7.5A Air bag diagnostic monitor, Blower motor relay, Passive deactivation Module (PAD)
7=7.5A Trailer Tow connector
8=10A Right headlamp, Daytime running lamps (DRL) module, Foglight relay
9=7.5A Stop Lamp switch
10= 7.5A Speed control-amplifier assembly,Brake pressure switch, Generic electronoc Module (GEM)
Shift lock actuator, Blend door actuator, Main light switch, RABS resistor, A/C heater assembly
Flasher
11= 7.5A Instrument cluster, Main light switch, RABS resistor
12= 10A Power window relay, Washer pump relay
13= 20A Stop lamp switch, Brake pressure switch
14= 20A Rear Anti Lock Brake system (RABS) module
**10A 4WABS module**

15=7.5A Instrument cluster
16= 30A Windshield wiper Motor, Wiper Hi-lo relay, wiper run/park relay
17=7.5A Cig lighter
18=15A Drivers unlock relay-All unlock relay
19=25A PCM power diode
20=7.5A RAP module GEM module, Radio
21=15A Flasher (hazard)
22=20A Aux power socket
23=15A Turn signals
24===not used
25= 7.5A GEM module, Instrument cluster
26= 10A Battery saver relay, Electronic Shift relay, Interior lamp relay
Power window relay,Electronic shift control module, transmission control
27=15A Switch,DRL, Backup lamp switch, DTR sensor,Instrument illumination dimming control module
Dome/map lamp, GEM,electronic shift,Interior lights,Glove box lamp and switch
28=7.5A GEM module-Radio
29= 15A Radio
30=15A Park lamps, trailer Tow relay
31===not used
32=10A rear blower
33=15A Headlamps, DRL module, Instrument cluster
34=7.5A Rear integrated control panel, CD
35=10A RABS test connector
36=7.5A CD, rear integrated control panel, memory seat, Message center Attached images __________________

A) Faulty turn signal switch or circuit.
B) Broken dimmer switch or poor electrical connection.Could be relay also.
C) Unplug the electrical connector at the motor and use fused jumper wires to connect the fan motor directly to the battery. If the fan still doesn't work replace the motor. If fan works could be your relay.

thare is a high beam relay and a low beam relay in the fuse box find the low beam relay and replace it. if this dont work its probabley the switch

It may not be the switch; most hi-lo changes are via relay to prevent the higher currents from flowing through light-duty switches.

Locate the relay cluster (it might be near or with the fuses) and if they aren't marked, pull wach one of them and plug back in several times to wipe possible corrosion from the blade contacts.

If they are marked, look to see if the same relay is used elsewhere (part number should be visible) and swap them temporarily to see if the relay is at fault.

Some vehicles will use separate relays for hi-lo beams and another for flashing since that often turns on both beams momentarily.