1948-1952 Shop Service Manual - - Hudson-Essex-Terraplane Club

ELECTRICAL SYSTEM 6 - 29
Weather Control - Fourteen ampere fuse in a fuse case on
left side of weather control housing.
Radio - Fourteen ampere fuse incorporated in the radio
"A" lead wire.
Drivemaster - Ten ampere fuse in the drivemaster control
switch on the instrument panel.
Direction Indicator - Ten ampere fuse attached to the
flasher unit lead wire.
Overdrive Circuit - Thirty ampere fuse on Overdrive relay.
FIGURE 32
3. Correct the circuit to the dimmer switch if lamp does not
light.
4. If lamp lights, replace the switch battery wire and touch
one lamp lead to the double connector and ground the other
lead.
5. Operate the dimmer switch. Lamp should light in one
switch position and not in the other. Repeat with lamp
connected to the lower beam terminal. If switch fails to turn
the lamp on and off from each terminal, replace switch.
CIRCUIT BREAKERS & FUSES
The main circuit breaker is incorporated in the car
headlight switch and is connected to an auxiliary circuit
breaker by a jumper wire.
The auxiliary circuit breaker is located on the steering
column brace under the dash panel.
NOTE: WHEN ACCESSORY ITEMS SUCH AS
CLOCK OR CIGAR LIGHTER ARE InstallED, THEY
MUST BE CONNECTED AS SHOWN IN THE WIR-
ING DIAGRAM
Fuses are used for the protection of optional equipment
as follows:
Electric Clock - Three ampere fuse in a fuse case at back
of clock.
HORNS
The horn is operated by a magnetic type motor which
consists of a field, armature, and a s et o f breaker points
which interrupt the flow of current in the coil.
The armature is securely attached to the diaphragm.
Interruption of the current in the coil causes the diaphragm
to vibrate which produces the sound.
The twin horns are constructed in such a manner as to
produce different tone frequencies and the frequencies of
each horn are synchronized to produce a harmonious tone
when the horns are sounded together.
The major items that govern the frequencies of tone are as
follows:
1. The form and thickness of diaphragm.
2. The weight attached to diaphragm.
3. The length of the air column.
4. The air gap setting between field and armature.