Orlando

DTC B3950 or B3951

Ground is applied at all times to the indicator/multifunction switch. When the indicator/multifunction switch is placed in either the turn right or turn left position, ground is applied to the right turn or left indicator switch signal circuit to the body control module (BCM) and the trailing lighting converter. The BCM and the trailing lighting converter then applies a voltage to the rear indicator lamps through there respective voltage supply circuits.

B3950 01 and B3951 01

The appropriate indicator is inactive.

B3950 02, B3950 04, B3951 02 or B3951 04

The appropriate indicator is active.

B3950 01 or B3951 01

The control module detects a short to voltage on the control circuit.

B3950 02 or B3951 02

The control module detects a short to ground on the control circuit.

B3950 04 or B3951 04

The control module detects an open control circuit.

The appropriate indicator is inoperative.

The condition for setting the DTC is not longer present.

Schematic Reference

Exterior Lamps Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Exterior Lighting Systems Description and Operation

Electrical Information Reference

Scan Tool Reference

Control Module References for scan tool information

Ignition ON, command the appropriate Rear Indicator Lamp test. The appropriate rear indicator lamp should be ON/OFF.

1. Ignition OFF, disconnect the appropriate harness connector at the tail lamp listed below:

•	E4LR Indicator Lamp - Left Rear

•	E4RR Indicator Lamp - Right Rear

2. Test for less than 5 Ω between the appropriate indicator lamp ground circuit harness connector listed below and ground.

•	E4LR Turn Signal Lamp - Left Rear harness connector terminal 3

•	E4RR Turn Signal Lamp - Right Rear harness connector terminal 3

⇒	If greater than the specified value, test the ground circuit for an open/high resistance.

3. Connect a test lamp between the appropriate indicator lamp control circuit harness connector listed below and ground.

•	E4LR Turn Signal Lamp - Left Rear harness connector terminal 2

•	E4RR Turn Signal Lamp - Right Rear harness connector terminal 2

4. Command the appropriate Indicator Lamp test ON and OFF with a scan tool. The test lamp should turn ON and OFF when changing between the commanded states.

⇒	If the test lamp is always ON, test the Signal circuit for a short to voltage. If the circuit tests normal, replace the K9 Body Control Module.

⇒	If the test lamp is always OFF, test the Signal circuit for a short to ground or an open/high resistance. If the circuits test normal, replace the K9 Body Control Module.

5. If all the circuits test normal, replace the appropriate indicator lamp.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.