Yamaha F150A Service Manual

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5-42PTT system012345678910A7. Connect the positive battery lead to theterminal “a”, and the negative batterylead to the terminal “b”, and then checkthe PTT relay for continuity. Replace thePTT relay if out of specification.8. Connect the PTT relay coupler, batterypower source, ground lead, and PTTmotor leads.9. Install the PTT relay and junction boxcover.Checking the PTT switch (on bottomcowling)1. Disconnect the PTT switch coupler “a”.2. Measure the input voltage between thePTT switch coupler terminal and ground.3. Check the PTT switch for continuity.Replace the PTT switch if out of specifi-cation.4. Connect the PTT switch coupler.Checking the trim sensor1. Disconnect the trim sensor coupler “a”,and then remove the trim sensor.PTT relay continuity:Terminal “c”–Terminal “e”Terminal “b”–Terminal “d”PTT relay continuity:Terminal “c”–Terminal “d”Terminal “b”–Terminal “e”G/W GLgSbaedcbG/W GLgSbaedcbPTT switch input voltage:Red (R)–Ground12 V (battery voltage)PTT switch continuity:Switch position UP:Terminal “a”–Terminal “b”Switch position DN:Terminal “b”–Terminal “c”RaLgRSbc b a