For 1990-2009 cars

Step | Action | Values | Yes | No
--- | --- | --- | --- | ---
1 | Did you perform the Radio/Audio System Check? | -- | Go to Step 2 | Go to Radio/Audio System Check
2 |

Caution: Unless directed otherwise, the ignition and start switch must be in the OFF or LOCK position, and all electrical loads must be OFF before servicing any electrical component. Disconnect the negative battery cable to prevent an electrical spark should a tool or equipment come in contact with an exposed electrical terminal. Failure to follow these precautions may result in personal injury and/or damage to the vehicle or its components.

1. Disconnect the negative battery cable. Refer to Battery Removal in Engine Electrical.
2. Disconnect the antenna lead-in connector at the radio receiver.

Important: In order to avoid a misdiagnosis, set the meter to zero prior to taking measurements.

3. Use a J 39200 digital multimeter in order to measure the resistance between the outer conductor of the coax connector and of the negative battery cable.

Is the resistance greater than the specified value?

0.15 ohms

Go to Step 4

Go to Step 3

3 |

1. Grasp the antenna mast.
2. Wiggle the antenna and observe the J 39200 .

Does the meter indicate intermittent continuity?

--

Go to Step 6

Go to Step 5

4 |

1. Inspect the base of the antenna for a good connection to body ground.
2. Inspect the coaxial interconnects for corrosion or for poor connections.
3. Inspect the ground connection from the battery negative cable to the body.
4. Repair the ground circuit as necessary.

Is the repair complete?

--

Go to Radio/Audio System Check

--

5 | Important: In order to avoid a misdiagnosis, set the meter to zero prior to taking measurements. Use a J 39200 digital multimeter in order to measure the resistance between the center conductor of the radial coaxial lead and the antenna mast. Is the resistance less than the specified value? | 1.0 ohms | Go to Step 7 | Go to Step 8
6 |

1. Inspect the base of the antenna for a good connection to body ground.
2. Inspect the coaxial cable interconnects for corrosion or for poor connection.
3. Inspect the ground connection from the battery negative cable to the body.
4. Repair the antenna ground circuit as necessary.

Is the repair complete?

--

Go to Radio/Audio System Check

--

7 | Wiggle the antenna coaxial cable and observe the J 39200 . Does the meter indicate intermittent continuity? | -- | Go to Step 8 | Go to Step 6
8 |

1. Inspect the coaxial cable interconnects for the following conditions:

• | A poor connection

• | Corrosion

2. Repair or replace the antenna coaxial circuit as necessary.

Is the repair complete?

--

Go to Radio/Audio System Check

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