Dodge Ram 2004 Service Manual page 525

PHONE SWITCH STUCK —
TEST
3 Turn the ignition off.
Disconnect the Automatic Day/Night Mirror harness connectors.
With the DRBIII , read the VR/Phone Switch Signal voltage.
Connect one end of a jumper wire to the VR/Phone Switch Signal circuit at the
Automatic Day/Night Mirror harness connector.
While observing the DRBIII , momentarily connect and disconnect the other end of
the jumper wire to Sensor Ground at the Automatic Day/Night Mirror harness
connector.
NOTE: The DRBIII sensor voltage should switch from above 4.7 volts when
jumper is not connected to below 0.6 volts when jumper is connected.
Does sensor voltage switch from above 4.7 volts to below 0.6 volt as described?
Yes → Replace the Automatic Day/Night Mirror in accordance with the
→ Inspect the wiring and connectors for damage or shorted circuits.
No
4 Turn the ignition off.
Disconnect the Automatic Day/Night Mirror harness connectors.
Disconnect the Hands Free Module harness connectors.
Measure the resistance of the VR/Phone Switch Signal circuit.
Is the resistance below 10.0 ohms?
Yes → Go To 5
→ Repair the VR/Phone Switch Signal circuit for an open.
No
5 Turn the ignition off.
Disconnect the Automatic Day/Night Mirror harness connectors.
Disconnect the Hands Free Module harness connectors.
Measure the resistance of the Sensor Ground circuit.
Is the resistance below 10.0 ohms?
Yes → Go To 6
→ Repair the Sensor Ground circuit for an open.
No
6 Turn the ignition off.
Disconnect the Automatic Day/Night Mirror harness connectors.
Disconnect the Hands Free Module harness connector.
Measure the resistance between ground and the VR/Phone Switch Signal circuit.
Is the resistance above 1000.0 ohms?
Yes → Go To 7
→ Repair the VR/Phone Switch Signal circuit for a short to ground.
No
Continued
ACTION
service information.
Perform BODY VERIFICATION TEST - VER 1.
Repair as necessary. If ok, replace and program the Hands Free
Module in accordance with the Service Information.
Perform BODY VERIFICATION TEST - VER 1.
Perform BODY VERIFICATION TEST - VER 1.
Perform BODY VERIFICATION TEST - VER 1.
Perform BODY VERIFICATION TEST - VER 1.
TELECOMMUNICATION
511
APPLICABILITY
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