Circuit/System Testing

2006 Chevrolet Cobalt SS, 4D Sedan, StandardSECTION Circuit/System Testing
WARNING: This page is about a different car, the 2007 Pontiac G5 Pursuit, 2007 Pontiac G5, and 2007 Chevrolet Cobalt. However, it is still accessible from the selected car via links, so may be relevant.
IMPORTANT: Perform the Audio System Troubleshooting HintsΒ  to properly identify the customers concern before using this diagnostic.
  1. With the ignition OFF, disconnect the ground harness connector at the antenna. Test for less than 1.0 ohm of resistance between the antenna ground circuit terminal 1 and chassis ground
    • If greater than the specified range, test the ground circuit for an open/high resistance.
  2. With the ignition OFF, disconnect the antenna cable from the radio. With a DMM, verify there is less than 0.20 ohms between the negative battery cable and the coaxial cable metal outer shield.
    • If greater than 0.20 ohms, replace the antenna coax cable.
  3. Disconnect the coax cable from the antenna mast. With a DMM, verify there is less than 3.5 ohms between the radio end coaxial cable conductor and the antenna end coaxial cable conductor.
    • If greater than 3.5 ohms, replace the coax cable.
  • If no problems are found with the coax cable or the grounding of the antena mast replace the radio.
RENDER: 1.0x

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When to See a Mechanic

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

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