I have a 03 2500 4x4 Quad Cab Dodge and have a couple of questions:

1.My reverse lights have stopped working (Bulbs / fuse are both good, no power to socket)

2. Clicking noise is coming from my drivers side tire (4x4 joint problem?)

Any suggestions or helpful tips will be appreciated.

 

Try disconnecting the wiring from the reverse switch and apply power to the plug.
If the lights work , then its the switch itself.

 

DIAGNOSIS AND TESTING - TRANSMISSION RANGE SENSOR (TRS)
NOTE: For all circuit identification in the following steps, Refer to the appropriate Wiring Information.

Raise vehicle on suitable hoist.
Disconnect the vehicle's shift cable from the manual lever.
With the manual lever in the PARK position (the PARK position is with the manual lever moved to the full rearward position), measure the resistance between the Park/Neutral Position Sense pin of the TRS and the transmission case. The resistance should be less than 5 ohms.
With the manual lever in the NEUTRAL position (the NEUTRAL position is with the manual lever moved two detents forward of the full rearward position), measure the resistance between the Park/Neutral Position Sense pin of the TRS and the transmission case. The resistance should be less than 5 ohms.
If the resistance is greater than 5 ohms in either of the previous steps, check for a dirty contact between the tip of the TRS rod and the valve body manual lever. If the contact is OK, replace the TRS.
With the manual lever in the REVERSE position (the REVERSE position is with the manual lever moved one detent forward of the full rearward position), measure the resistance between the Fused Ignition Switch Output and the Back-up Lamp feed pins of the TRS. The resistance should be less than 5 ohms. If the resistance is greater than 5 ohms, replace the TRS.
With the manual lever in the PARK position (the PARK position is with the manual lever moved to the full rearward position), measure the resistance between the Transmission Range Sensor MUX and the Transmission Range Sensor 5V Supply pins of the TRS. The resistance should be 522.2 ohms. If the resistance is not correct, replace the TRS.
With the manual lever in the REVERSE position (the REVERSE position is with the manual lever moved one detent forward of the full rearward position), measure the resistance between the Transmission Range Sensor MUX and the Transmission Range Sensor 5V Supply pins of the TRS. The resistance should be 206.2 ohms. If the resistance is not correct, replace the TRS.
With the manual lever in the NEUTRAL position (the NEUTRAL position is with the manual lever moved two detents forward of the full rearward position), measure the resistance between the Transmission Range Sensor MUX and the Transmission Range Sensor 5V Supply pins of the TRS. The resistance should be 108.6 ohms. If the resistance is not correct, replace the TRS.
With the manual lever in the DRIVE position (the DRIVE position is with the manual lever moved three detents forward of the full rearward position), measure the resistance between the Transmission Range Sensor MUX and the Transmission Range Sensor 5V Supply pins of the TRS. The resistance should be 59.9 ohms. If the resistance is not correct, replace the TRS.
With the manual lever in the SECOND position (the SECOND position is with the manual lever moved one detent rearward of the full forward position), measure the resistance between the Transmission Range Sensor MUX and the Back-up Lamp feed pins of the TRS. The resistance should be 31.9 ohms. If the resistance is not correct, replace the TRS.
With the manual lever in the LOW position (the LOW position is with the manual lever moved to the full forward position), measure the resistance between the Transmission Range Sensor MUX and the Back-up Lamp feed pins of the TRS. The resistance should be 13.7 ohms. If the resistance is not correct, replace the TRS.

REMOVAL
Raise vehicle and position drain pan under the transmission range sensor (TRS).
Move the transmission manual lever to the manual LOW position. The manual LOW position is with the manual lever in the forward-most detent.
Disengage the wiring connector from the TRS.
Remove the two screws holding the TRS to the TRS mounting bracket.
Remove the TRS (3)(Remove Transmission Range Sensor) from the TRS mounting bracket by pulling it straight out of the bracket.
If necessary, loosen the TRS mounting bracket (2) in the transmission case using Adapter 8581 (3)(Loosen the TRS Mounting Bracket).
If necessary, remove the TRS mounting bracket (2)(Remove TRS Mounting Bracket) from the transmission case.

INSTALLATION
Move the transmission manual shaft lever to the manual LOW position.
If necessary, install the TRS mounting bracket (2) into the transmission case. Using Adapter 8581 (3)(Tighten the TRS Mounting Bracket), tighten the mounting bracket to 34 N·m (300 in.lbs.).
Install the TRS (3)(Remove Transmission Range Sensor) into the mounting bracket (2) with the wiring connector facing the front of the transmission.
Install the two screws to hold the TRS to the mounting bracket. Tighten the screws to 5 N·m (45 in.lbs.).
Verify proper sensor operation (1-4)(Transmission Range Sensor Operation).
Move the transmission manual shaft lever to the PARK position.
Connect TRS wiring connector to the TRS and lower vehicle.
Refill the transmission fluid to the correct level.

 

And yes, most likely a u-joint to the clicking in the driver's wheel area question. Just have to start feeling around for loose stuff.

 

The back up light switch is notorious for going bad. Simple test by disconnecting the wiring at the switch, insert a jumper wire or paper clip into the harness connector. If your backup lights work, the switch is bad.

 

The automatics have the transmission range sensor. Only the manuals have a basic switch.

 

Thanks for all the information. Will let you know how it turns out.

 

Mine is a manual transmission, so just a basic switch.

Thanks again!