Step | Action | Value(s) | Yes | No | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
Schematic Reference: Radio/Audio System Schematics | ||||||||||
1 | Did you review the Radio/Audio System Description and Operation? | -- | Go to Step 2 | Go to Symptoms - Entertainment | ||||||
2 | Turn ON the radio and tune to a known strong AM station, then tune to a known strong FM station. Is the radio reception clear? | -- | Go to Step 3 | |||||||
3 | Inspect for a poor connection at the radio antenna lead-in connector. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 12 | Go to Step 4 | ||||||
4 | Test the antenna ground plane.
Important:: Always zero out the DMM before taking a resistance measurement in order to ensure an accurate reading. Does the resistance measure greater than the specified value? | 0.20 ohms | Go to Step 5 | Go to Step 7 | ||||||
5 | Inspect the antenna coaxial cable for a proper connection to body ground. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 12 | Go to Step 6 | ||||||
6 | Test for an open or high resistance from the battery negative cable to body ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 12 | Go to Step 8 | ||||||
7 | Measure the resistance between the antenna coaxial lead-in connector (center conductor) and the antenna grid connection. Refer to Circuit Testing in Wiring Systems. Does the resistance measure greater than the specified values? | RG58/ RG-59 Coax: 0.2 ohms RG-62/ RG-62M Coax: 3.5 ohms | Go to Step 8 | Go to Step 10 | ||||||
8 | Inspect the antenna coaxial cable interconnects for a poor connection or corrosion. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 12 | Go to Step 9 | ||||||
9 | Test each piece of coaxial cable for:
Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 12 | Go to Step 11 | |||||||
10 | Inspect for any damage to the antenna grid on the glass. Did you find and correct the condition? | -- | Go to Step 12 | -- | ||||||
11 | Replace the radio. Refer to Radio Replacement . Did you complete the repair? | -- | Go to Step 12 | -- | ||||||
12 | Operate the system in order to verify the repair. Did you correct the condition? | -- | System OK | Go to Step 2 | ||||||
