Symptom | Diagnosis | Remedy | ||
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Engine Noise on | Speaker | leads | are | Disconnect existing speak- |
the Speaker Out- | shorted to each other or | ers and test with known | ||
puts of the Ampli- | to the chassis of the ve- | working speakers. If engine | ||
fier | hicle. |
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| noise is gone, check and |
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| repair wiring and installa- |
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| tion of speakers as neces- |
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| sary. |
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| RCA input from source | Check connections, substi- | ||
| unit is not connected or | tute with known working | ||
| not functioning | prop- | cables and repair or replace | |
| erly. |
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| as necessary. |
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| RCA cable is picking up | Run the RCA cable on a | ||
| radiated noise. |
| different route. | |
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| Ground loop in antenna | Disconnect antenna from | ||
| line. |
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| the source unit. If engine |
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| noise is gone, check, and |
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| repair wiring and installa- |
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| tion or use an antenna |
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| ground loop isolator. |
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| Multiple | grounding | Bypass all other equipment | |
| paths in the signal chain. | (crossovers and equalizers) | ||
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| by connecting the head unit |
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| directly to the amp. If noise |
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| is gone, reconnect equip- |
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| ment one piece at a time |
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| and test for noise after each |
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| install. |
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• If noise persists, see your Authorized Rockford Fosgate Dealer.
