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HOMESERVICE MANUALSCHEVROLET1998SUBURBAN K2500, 7.4 J, PART TIMEREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 611 (ENTERTAINMENT SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESTAILGATE AUDIO CONTROLS INOPERATIVE
1998 Chevrolet Suburban K2500, 7.4 J, Part Time

Tailgate Audio Controls Inoperative

1998 Chevrolet Suburban K2500, 7.4 J, Part TimeSECTION Tailgate Audio Controls Inoperative
WARNING: This page is about a different car, the 2004 Pontiac Aztek and 2004 Buick Rendezvous. However, it is still accessible from the selected car via links, so may be relevant.
Tailgate Audio Controls Inoperative

Step Action Value(s) Yes No
Schematic Reference:  Radio/Audio System Schematics  
1 Did you perform the Radio/Audio System Diagnostic System Check? - Go to Step 2  Go to Diagnostic System Check - Entertainment System 
2
  1. Turn ON the ignition, with the engine OFF.
  2. Turn ON the radio.
  3. Operate all of the tailgate audio control buttons.
Do all of the tailgate audio control buttons operate properly?		 - Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems Go to Step 3 
3
  1. Turn OFF the ignition.
  2. Disconnect the tailgate audio controls connector. Refer to Audio Control Replacement - Rear Quarter  for service procedure.
  3. Turn ON the ignition, with the engine OFF.
  4. Turn ON the radio.
  5. Measure the voltage from the remote radio control supply voltage circuit of the radio to a good ground.
Does the voltage measure near the specified value?		 9.5 V Go to Step 4  Go to Step 5 
4
  1. Measure the resistance from the remote radio control supply voltage circuit of the tailgate audio controls and the steering wheel controls signal circuit of the tailgate audio controls.
  2. Press the following tailgate audio control buttons and record the resistance values:
    • Volume Up
    • Volume Down
    • Play
    • Mute
    • Seek Up
    • Seek Down
    • AM/FM
    • Pre-Set
Do the recorded resistances measure near the specified values?		 1270 Ω
1564 Ω
1912 Ω
2387 Ω
3102 Ω
4282 Ω
6652 Ω
13,632 Ω		 Go to Step 6  Go to Step 7 
5 Test the remote radio control supply voltage circuit between the tailgate audio controls harness connector and the radio for an open, high resistance or short. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 11  Go to Step 8 
6
  1. Disconnect the radio connector. Refer to Radio Replacement  for service procedure.
  2. Test the steering wheel controls signal circuit between the tailgate audio controls harness connector and the radio connector for an open, high resistance or short. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 11  Go to Step 8 
7 Inspect for poor connections at the harness connector of the tailgate audio controls. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 11  Go to Step 9 
8 Inspect for poor connections at the harness connector of the radio. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 11  Go to Step 10 
9 Replace the tailgate audio controls. Refer to Audio Control Replacement - Rear Quarter  for service procedure.
Did you complete the replacement?		 - Go to Step 11  -
10
IMPORTANT: Perform the set up procedure for the radio.
Replace the radio. Refer to Radio Replacement  for service procedure.Did you complete the replacement?		 - Go to Step 11  -
11 Operate the system in order to verify the repair.
Did you correct the condition?		 - System OK -
RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.