Notice: Remember to "zero" the meter before taking measurements. When checking resistance, cautiously wiggle the lead-in tip and cable. The readings below should always be obtained. If not, some portions of the lead-in is intermittent and the lead-in should be replaced.

1. Disconnect the negative battery cable.
2. Disconnect the antenna lead-in connector at the radio receiver.
3. Using a Digital Multimeter (DMM), measure the resistance between the coax radio connector outer conductor and the negative battery cable.

Is the resistance less than the specified value?

0.15 ohms

Go to Step 2

Go to Step 5

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

Does the DMM indicate intermittent continuity?

--

Go to Step 5

Go to Step 3

Notice: Remember to "zero" the meter before taking measurements. When checking resistance, cautiously wiggle the lead-in tip and cable. The readings below should always be obtained. If not, some portions of the lead-in is intermittent and the lead-in should be replaced.

Use a DMM and measure the resistance between the radio coaxial lead-in connector inner conductor and antenna mast.

Is the resistance less than the specified value?

0.15 ohms

Go to Step 4

Go to Step 6

While observing the DMM, wiggle the coaxial wire.

Does the DMM indicate intermittent continuity?

--

Go to Step 6

Go to Speaker Noise - General

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

Is the repair complete?

--

System OK

Go to Speaker Noise - General

1. Check the coax cable interconnects for a poor connection or corrosion.
2. Repair or replace the antenna coaxial circuit as necessary.
3. Perform the General Radio Noise diagnostic procedure.

Is the repair complete?

--

System OK

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