TB741P/TB742P/TB743W
25
English
Installation and Wire
connection manual
6.
REMOVING THE MAIN UNIT
7.
CAUTIONS ON WIRING
1. When the rear of the main unit has been
secured with the method shown in Figure 6
unfasten the special screw.
2. Remove the outer escutcheon.
3. Insert the hook plate between the spring and
the universal mounting bracket, fit tab
B
of
the spring into hole
A
of the hook plate,
then pull the main unit out by the hook plate.
(Insert both the right and left edges of the
hook plate.) (Figure 9)
Note:
Keep the hook plate. You cannot remove the main
unit without disengaging the hook plate.
2–Hook plates
Spring
Universal mounting bracket
Instrument panel
Figure 9
A
B
Outer escutcheon
Main
Unit
1. Be sure to turn the power off before wiring.
2. Be particularly careful where you route the
wires.
Keep them well away from the engine, and
exhaust pipe, etc.
Heat may damage the wires.
3. When connecting the ground lead, fasten
the ground lead (black) securely to a clean
metal plate on the car. (Figure 10)
If the set is insufficiently grounded, it may
not operate or there may be noise.
4. If the fuse should blow, check to see if the
wiring is correct.
If it is, replace the fuse with a new one with
the same amperage rating as the original.
5. To replace the fuse, remove the old fuse of
the power supply lead and insert the new
one (3A). (Figure 11)
After the connection, fix the lead by a clamp
or insulation tape for protection.
CAUTION
Screw on car
Fasten securely to a clean
metal plate on the car.
Figure 10
Fuse
Fuse holder
Figure 11
