Important: Remove the negative lead of the battery and zero the meter before measuring the resistance of the antenna. When checking resistance, cautiously wiggle the antenna mast, lead-in tip and cable. The readings listed below must be obtained. If the readings are other than those listed, some portion of the lead-in is intermittent and the lead-in should be replaced.

1 and 2

less than 0.15

1 and 6

less than 0.15

2 and 3

less than 0.15

2 and 6

less than 0.15

1 and 4

Infinite

2 and 4

Infinite

2 and 5

Infinite

2 and 7

Infinite

1 and 5

Infinite

1 and 7

Infinite

1 and 3

less than 0.15

4 and 7 (RG-62 and RG-62M)

less than 3.5

4 and 7 (RG-58 and RG-59)

less than 0.2

4 and 2

Infinite

4 and 6

Infinite

4 and 3

Infinite

5 and 3

Infinite

4 and 5 (RG-62 and RG-62M)

less than 3.5

4 and 5 (RG-58 and RG-59)

less than 0.2

1. Disconnect the antenna lead-in connector at the radio receiver.
2. Measure the resistance between the coax (outer conductor) connector and the negative battery cable with a DMM. Refer to Circuit Testing in Wiring Systems.

Is the resistance value greater than 0.15 ?

> 0.15 ohms

Go to Step 2

Go to Step 5

Inspect the base of the antenna.

Is the connection good to the body ground?

--

Go to Step 3

Go to Step 6

Inspect the coaxial cable interconnects for a poor connection or corrosion. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.

Is either symptom present?

--

Go to Step 4

Go to Step 6

Inspect the ground connection from the battery negative cable to the body. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.

Is the connection good?

--

Go to Step 5

Go to Step 6

1. Grasp the antenna mast.
2. Wiggle the antenna while observing the DMM.

Does the meter indicate intermittent continuity?

--

Go to Step 2

Go to Step 7

Repair the antenna ground circuit. Refer to Antenna Mast Cleaning .

Is the repair complete?

--

System OK

--

Measure the resistance between the radio coax lead-in connector (center conductor) and the antenna mast with a DMM. Refer to Circuit Testing in Wiring Systems.

Is the measured resistance less than the specified values?

RG-58/RG-59: 0.2 ohms

RG-62/RG-62M: 3.5 ohms

Go to Step 8

Go to Step 3

Wiggle the antenna coax while observing the DMM.

Does the meter indicate intermittent continuity?

--

Go to Step 9

System OK

Inspect the coaxial cable interconnects for a poor connection or corrosion. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.

Is either symptom present?

--

Go to Step 10

System OK

Repair/replace the antenna coaxial circuit. Refer to Power Antenna Motor Replacement

.

Is the repair complete?

--

System OK

--