Dodge Ram Truck 1500-2500-3500. Manual — part 442

LAMPS/LIGHTING - INTERIOR - ELECTRICAL DIAGNOSTICS

TABLE OF CONTENTS

page

page

LAMPS/LIGHTING - INTERIOR - ELECTRICAL

DIAGNOSTICS
CAUTION

MIC-CARGO LAMP OUTPUT CIRCUIT

SHORTED OR OPEN . . . . . . . . . . . . . . . . . . 175

*DRIVER DOOR AJAR CIRCUIT OPEN

. . . . 178

*DRIVER DOOR AJAR CIRCUIT SHORTED

TO GROUND . . . . . . . . . . . . . . . . . . . . . . . . 181

*LEFT REAR DOOR AJAR CIRCUIT OPEN

. 183

*LEFT REAR DOOR AJAR CIRCUIT

SHORTED TO GROUND . . . . . . . . . . . . . . . 186

*PASSENGER DOOR AJAR CIRCUIT OPEN

. 188

*PASSENGER DOOR AJAR CIRCUIT

SHORTED TO GROUND . . . . . . . . . . . . . . . 191

*RIGHT REAR DOOR AJAR CIRCUIT

OPEN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 193

*RIGHT REAR DOOR AJAR CIRCUIT

SHORTED TO GROUND . . . . . . . . . . . . . . . 196

MIC-COURTESY LAMP OUTPUT CIRCUIT

SHORTED OR OPEN . . . . . . . . . . . . . . . . . . 198

MIC-GLOVEBOX-MAP LAMP OUTPUT

CIRCUIT SHORTED OR OPEN . . . . . . . . . . 201

SCHEMATICS AND DIAGRAMS

. . . . . . . . . . . 204

LAMPS/LIGHTING - INTERIOR - ELECTRICAL DIAGNOSTICS

CAUTION

8L - 174

LAMPS/LIGHTING - INTERIOR - ELECTRICAL DIAGNOSTICS

DR/DH

MIC-CARGO LAMP OUTPUT CIRCUIT SHORTED OR OPEN

DR/DH

LAMPS/LIGHTING - INTERIOR - ELECTRICAL DIAGNOSTICS

8L - 175

MIC-CARGO LAMP OUTPUT CIRCUIT SHORTED OR OPEN (CONTINUED)

For the Interior Lighting system circuit diagram (Refer to 8 - ELECTRICAL/LAMPS/LIGHTING - INTERIOR - SCHE-
MATICS AND DIAGRAMS).

For a complete wiring diagram Refer to Section 8W.

•

When Monitored:
With the ignition on

•

Set Condition:
The CCN detects a short condition

Possible Causes

HEADLAMP SWITCH

CARGO LAMP OUTPUT CIRCUIT SHORT TO GROUND

INSTRUMENT CLUSTER

1.

INTERMITTENT CONDITION

Turn the ignition on.

With the DRBIII

T

, clear all MIC DTC’s.

Turn the Cargo Lamps on.

With the DRBIII

T

, read the DTC information.

Does the DRBIII

T

read: Cargo Lamp Output Cir-

cuit Short/Open?

Yes

>> Go To 2

No

>> The condition that caused the symptom is

currently not present. Inspect the related
wiring for a possible intermittent condition.
Look for any chafed, pierced, pinched, or
partially broken wires.

Perform BODY VERIFICATION TEST -
VER 1.

2.

HEADLAMP SWITCH

Disconnect the Headlamp Switch connector.

Turn the ignition on.

Does the DRBIII

T

display Headlamp Switch 5.0 volts?

Yes

>> Replace the Headlamp Switch.

Perform BODY VERIFICATION TEST - VER 1.

No

>> Go to 3

8L - 176

LAMPS/LIGHTING - INTERIOR - ELECTRICAL DIAGNOSTICS

DR/DH

MIC-CARGO LAMP OUTPUT CIRCUIT SHORTED OR OPEN (CONTINUED)

3.

CARGO LAMP OUTPUT CIRCUIT SHORT TO GROUND

Turn the ignition off.

Disconnect the Headlamp Switch connector.

Disconnect the Instrument Cluster C1 connector.

Measure the resistance of the Cargo Lamp Output circuit to ground.

Is the resistance below 5.0 ohms?

Yes

>> Repair the Cargo Lamp Output circuit..

Perform BODY VERIFICATION TEST - VER 1.

No

>> Replace the Instrument Cluster.

Perform BODY VERIFICATION TEST - VER 1.

DR/DH

LAMPS/LIGHTING - INTERIOR - ELECTRICAL DIAGNOSTICS

8L - 177