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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 615 (Entertainment System) >> Diagnostic Information and Procedures >> Radio Poor Reception >> Antenna System Test

Antenna System Test

WARNING: This page is about a different car, the 2002 GMC Savana Special, 2002 GMC Savana Camper Special, 2002 GMC Savana, and 2002 Chevrolet Chevy Express. However, it is still accessible from the selected car via links, so may be relevant.

Important:  Always zero out the DMM before taking a resistance measurement in order to ensure an accurate reading.

  1. Disconnect the negative battery cable.
  2. Disconnect the antenna lead-in connector from the radio receiver.
  3. Measure the resistance from the negative battery cable to the coax, outer conductor connector.
  4. The resistance measured should be 0.20 Ω or less.
  5. Test the following when the resistance is greater than 0.20 Ω.
    • Base of the antenna for a poor connection to body ground.
    • The coaxial cable interconnects for a poor connection or corrosion.
    • Test for an open or high resistance from the battery negative cable to the body. Refer to CIRCUIT TESTING and WIRING REPAIRS .
  6. After finding and correcting the condition, operate the system in order to verify the repair.

Perform the Antenna Checking Procedures after confirming the integrity of the antenna ground.

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