Dodge Ram Truck 1500-2500-3500. Manual — part 2033

ZONE OVERCURRENT (DUAL-ZONE) (CONTINUED)

6.

CHECK THE (C34) COMMON DOOR DRIVER CIRCUIT FOR A SHORT TO THE (C32) RECIRCULATION
DOOR DRIVER CIRCUIT, THE (C61) BLEND DOOR DRIVER CIRCUIT, THE (C801) MODE DOOR 1 DRIVER
CIRCUIT, THE (C29) MODE DOOR 2 DRIVER CIRCUIT, & THE (C33) PASSENGER BLEND DOOR DRIVER
CIRCUIT

Measure the resistance between the (C34) Common Door Driver Cir-
cuit and the (C32) Recirculation Door Driver circuit, the (C61) Blend
Door Driver circuit, the (C801) Mode Door 1 Driver circuit, the (C29)
Mode Door 2 Driver circuit, and, the (C33) Passenger Blend Door
Driver circuit in the A/C Heater Control C1 harness connector.

Is the resistance below 30.0 ohms on any of the circuits?

Yes

>> Go To 7

No

>> Go To 8

7.

CHECK THE DOOR DRIVER CIRCUITS WHOSE RESISTANCE WAS BELOW 30.0 OHMS IN THE
PREVIOUS STEP FOR A SHORT TO THE (C34) COMMON DOOR DRIVER CIRCUIT

Disconnect all door actuator harness connectors whose circuit resis-
tance was below 30.0 ohms.

Measure the resistance between the (C34) Common Door Driver cir-
cuit and each applicable door driver circuit in the A/C Heater Control
C1 harness connector.

Is the resistance below 10k ohms on any of the circuits?

Yes

>> Repair the door driver circuits with a resistance below 10k

ohms for a short to the (C34) Common Door Driver circuit.

Perform BODY VERIFICATION TEST - VER 1. (Refer to 8
-

ELECTRICAL/ELECTRONIC

CONTROL

MODULES/

FRONT CONTROL MODULE - DIAGNOSIS AND TEST-
ING).

No

>> Replace all door actuators with a resistance below 30.0

ohms in accordance with the Service Information.

Perform BODY VERIFICATION TEST - VER 1. (Refer to 8
-

ELECTRICAL/ELECTRONIC

CONTROL

MODULES/

FRONT

CONTROL

MODULE

-

DIAGNOSIS

AND

TESTING).

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HVAC - ELECTRICAL DIAGNOSTICS

DR/DH

ZONE OVERCURRENT (DUAL-ZONE) (CONTINUED)

8.

RUN THE ACTUATOR CIRCUIT TEST

Reconnect the A/C Heater Control C1 harness connector.

Turn the ignition on.

With the DRBIII

T

in HVAC, select System Tests and then select Actuator Circuit Test. Allow the test to run to com-

pletion before proceeding.

Does the DRBIII

T

display any Actuator Circuit Test fault messages?

Yes

>> Diagnose and repair the fault(s). Refer to *ACTUATOR CIRCUIT TEST DIAGNOSTICS (DUAL-ZONE) in

this section.

No

>> Replace the A/C Heater Control in accordance with the Service Information.

Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL
MODULES/FRONT CONTROL MODULE - DIAGNOSIS AND TESTING).

DR/DH

HVAC - ELECTRICAL DIAGNOSTICS

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*A/C HEATER CONTROL ILLUMINATION INOPERATIVE

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HVAC - ELECTRICAL DIAGNOSTICS

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*A/C HEATER CONTROL ILLUMINATION INOPERATIVE (CONTINUED)

For the Manual Temperature Control circuit diagrams (Refer to 24 - HEATING & AIR CONDITIONING - SCHEMAT-
ICS AND DIAGRAMS).

For a complete wiring diagram Refer to Section 8W.

Possible Causes

FAULTS PRESENT IN THE CLUSTER (MIC)

(E16) PANEL LAMPS DRIVER CIRCUIT OPEN

BULB(S) - FILAMENT OPEN (SINGLE-ZONE HVAC MODULE ONLY)

CLUSTER (MIC)

A/C HEATER CONTROL

Diagnostic Test

1.

CHECK FOR DTCs IN THE CLUSTER (MIC)

Turn the ignition on.

With the DRBIII

T

, read Cluster DTCs.

Does the DRBIII

T

display any DTCs?

Yes

>> Diagnose and repair the DTC(s). (Refer to 8 - ELECTRICAL/INSTRUMENT CLUSTER - DIAGNOSIS

AND TESTING) for the diagnostic test procedure.

Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL
MODULES/FRONT CONTROL MODULE - DIAGNOSIS AND TESTING).

No

>> Go To 2

2.

TEST (E16) PANEL LAMPS DRIVER CIRCUIT USING A TEST LIGHT

Turn the Headlamp switch on.

Rotate the Cargo Dome switch to the full brightness setting.

CAUTION: The test light must illuminate brightly. Compare the
brightness to that of a direct connection to the battery.
Using a 12-volt test light connected to ground, back probe the (E16)
Panel Lamps Driver circuit in the A/C Heater Control C1 harness con-
nector.

Does the test light illuminate brightly?

Yes (Dual-Zone Systems)

Replace the A/C Heater Control in accordance with the
Service Information.

Perform BODY VERIFICATION TEST - VER 1. (Refer to 8
-

ELECTRICAL/ELECTRONIC

CONTROL

MODULES/

FRONT CONTROL MODULE - DIAGNOSIS AND TEST-
ING).

Yes (Single-Zone Systems)

Go To 3

No

>> Go To 4

DR/DH

HVAC - ELECTRICAL DIAGNOSTICS

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