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Home >> Jeep >> 2014 >> Wrangler Sahara, Standard Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 242 (Audio/Video - Non-DTC Based Diagnostics) >> Diagnosis And Testing >> Poor Or No Am/Fm Audio Reception >> Diagnostic Test

Diagnostic Test

WARNING: This page is about a different car, the 2016 Jeep Wrangler and 2015 Jeep Wrangler. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK THE ANTENNA CONNECTION 
    1. Turn the ignition off.
    2. Disconnect the Radio C4 harness connector.
    3. Inspect the Audio Antenna harness connection.

      Is the Antenna connection clean and secure?

      Yes 

      • Go To Step  2

      No 

      • Repair the Antenna connection as needed.
      • Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  2. RADIO 
    1. Connect the (special tool #9977-6-FM, Antenna) to the Radio C4 component connector.
    2. Place the test antenna base on the roof of the vehicle.
    3. Turn the ignition on.
    4. Drive the vehicle outside to an un-obstructed area.
    5. Turn the Radio on and select several different known good stations from the AM and FM bands.

      Is the audio reception still poor or not available?

      Yes 

      • Replace the Radio in accordance with the Service Information.
      • Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .

      No 

      • Go To Step  3
  3. ANTENNA 
    1. Turn the ignition off.
    2. Reconnect the Radio C4 harness connector.
    3. Disconnect the Radio Antenna harness connector.
    4. Connect the (special tool #9977-6-FM, Antenna) to the Radio Antenna harness connector.
    5. Turn the Radio on and select several different known good stations from the AM and FM bands.

      Is the audio reception still poor or not available?

      Yes 

      • Go To Step  4

      No 

      • Replace the Radio Antenna in accordance with the Service Information.
      • Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  4. ANTENNA CABLE 
    Fig 1: Special Tool Jumper & Antenna Harness Connector
    GC0143945Courtesy of CHRYSLER GROUP, LLC
    1. Turn the ignition off.
    2. Disconnect the (special tool #9977-6-FM, Antenna) from the Radio Antenna harness connector.
    3. Connect the appropriate (special tool #9977-6-4, Jumper) (1) or (special tool #9977-6-2, Jumper) (1) to the Radio Antenna harness connector (2) at the Antenna.
      Fig 2: Special Tool, Antenna Harness Connector & DVOM
      GC0143944Courtesy of CHRYSLER GROUP, LLC
    4. Disconnect the Radio C4 harness connector.
    5. Connect the appropriate (special tool #9977-6-1, Adapter) (1) or (special tool #9977-6-3, Adapter) (1) to the Radio C4 harness connector (2).
    6. Measure the resistance across the tool terminals.

      Is the resistance between 47.5 and 52.5 Ohms?

      Yes 

      • The source of the poor reception is not caused by the Radio, Antenna Cable or Radio Antenna.
      • Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .

      No 

      • Replace the Antenna Cable in accordance with the Service Information.
      • Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
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