Did you perform the Radio/Audio System Check?

--

Go to Step 2

Go to Radio/Audio System Check

1. Disconnect the negative battery cable.
2. Disconnect the antenna lead in connector at the radio receiver.

Important: Zero the J 39200 DMM before taking measurements in order to avoid misdiagnosis.

3. Measure the resistance between the coax (outer conductor) connector and the negative battery cable.

Is the resistance less than the specified value?

0.15 ohms

Go to Step 3

Go to Step 6

1. Grasp the antenna mast.
2. While observing the J 39200 DMM, wiggle the antenna.

Does the J 39200 DMM indicate intermittent continuity?

--

Go to Step 6

Go to Step 4

Important: Zero the J 39200 DMM before taking measurements in order to avoid misdiagnosis.

Measure the resistance between the radio coaxial lead-in connector (center conductor) and the antenna mast.

Is the resistance less than the specified value?

3.5 ohms

Go to Step 5

Go to Step 7

Observe the J 39200 DMM, and wiggle the antenna.

Does the J 39200 DMM indicate intermittent continuity?

--

Go to Step 7

Go to Step 8

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

Is the repair complete?

--

Go to Radio/Audio System Check

--

1. Inspect the coaxial cable interconnects for a poor connection or corrosion.
2. Repair or replace the antenna coaxial circuit as needed. Refer to Coaxial Cable Replacement .

Is the repair complete?

--

Go to Radio/Audio System Check

--

Service the radio. Refer to Radio Replacement .

Is service of the radio complete?

--

Go to Radio/Audio System Check

--