Diagnostic Test

1. Turn the ignition on.
2. With the scan tool, record and erase the DTCs.
3. Operate the rear defogger switch several times.
4. With the scan tool, read the DTCs.

   Does the scan tool display active DTC: B10ED-REAR DEFROST CONTROL CIRCUIT OVERCURRENT?

   Yes 

   • Go to step  2

   No 

   • The conditions that caused this code to set are not present at this time. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors.
   • Perform the BODY VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure .

1. Turn the ignition off.
2. Check for signs of corrosion build up and damage at all connection points.
   NOTE: Make sure all in-line connectors are inspected for corrosion and damage.
3. Disconnect the TIPM C8 harness connector.
4. Visually inspect the wiring harness. Look for any chafed, pierced, pinched or partially broken wires hidden in the wire insulation.

   Were any of the above conditions found?

   Yes 

   • Repair or replace as necessary.
   • Perform the BODY VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure .

   No 

   • Go to step  3

Is vehicle equipped with heated mirrors?

Yes 

• Go to step  4

No 

• Go to step  7

Fig 1: Checking Fused Rear Defogger Control Output Circuit For High Resistance

Courtesy of CHRYSLER LLC

1. Disconnect both outside rearview mirror connectors.
2. Connect a jumper wire between the (C16) Fused Rear Defogger Control Output circuit and ground at one of the outside rearview mirror harness connectors.
3. Using a 12-volt test light connected to 12-volts, check the (C16) Rear Defogger Control Output circuit in the TIPM C8 harness connector.
   NOTE: The test light should be illuminated and bright. Compare the brightness to that of a direct connection to the battery.