Yamaha F150A, Service Manual

Page: 173 / 493

5-42
PTT system
0
1
2
3
4
5
6
7
8
9
10
A
7. Connect the positive battery lead to the
terminal “a”, and the negative battery
lead to the terminal “b”, and then check
the PTT relay for continuity. Replace the
PTT relay if out of specification.
8. Connect the PTT relay coupler, battery
power source, ground lead, and PTT
motor leads.
9. Install the PTT relay and junction box
cover.
Checking the PTT switch (on bottom
cowling)
1. Disconnect the PTT switch coupler “a”.
2. Measure the input voltage between the
PTT 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 sensor
1. 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 G
Lg
Sb
a
e
d
c
b
G/W G
Lg
Sb
a
e
d
c
b
PTT switch input voltage:
Red (R)–Ground
12 V (battery voltage)
PTT switch continuity:
Switch position UP:
Terminal “a”–Terminal “b”
Switch position DN:
Terminal “b”–Terminal “c”
R
a
Lg
R
Sb
c
b
a