Hudson 1955 Rambler, Technical & Service Manual

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36
T E C H N I C A L S E R V I C E M A N U A L
1. Windshield Wiper Control 4. Light Switch
2. Instrument Cluster 5. Weather Eye
Control Valve
3. Ignition Switch 6. Cigar Lighter
FIGURE 38— Instrument Cluster Assembly and Dash Panel "Rambler" Series
and "Wasp" Series, and by a toggle switch in dash panel
edge on left side of steering column on the "Rambler"
Series.
HIGH BEAM INDICATOR LIGHT
This light is connected to the high beam circuit in the
headlight foot or dimmer switch. When the high beam is
Operating in the head lamps, a red light dot is seen below
the center of the speedometer scale on the "Hornet" and
"Wasp" Series, and in the lower radius of the instrument
cluster on the "Rambler" Series.
NO CHARGE INDICATOR LIGHT
A light is used to indicate general generator operation.
When the output of the generator is below battery poten-
tial, a red light dot is seen on the left hand side of the
instrument cluster above temperature gauge. When the
generator output is above battery potential, other factors
(wiring, voltage regulator, etc.) being normal, the light is
out. On the "Rambler" Series, the no charge light is in the
left side of the instrument cluster.
The charge indicator bulb is in an insulated socket and is
connected to the charging circuit obtaining its ground
through the voltage regulator. When the generator output
rises above battery potential, the current flow from the
generator reverses the direction of flow in the charging
circuit and the light goes out. At this time, the charge
indicator light no longer obtains a ground through the
voltage regulator.
LOW OIL PRESSURE WARNING LIGHT
The low pressure warning light is wired in series
with the oil
pressure sending unit on the engine block. This
sending unit contains a diaphragm, spring, link-
age, and electrical contacts. When the ignition
switch is in the "on" position, the warning light
circuit is energized and the circuit is completed
through the closed contacts in the sending unit.
Upon start of the engine, build up of oil pressure
will compress the diaphragm opening the contact
points, thereby breaking the circuit.
Oil Pressure Unit Test Procedure
Connect indicator light bulb in series with
sending unit. Apply air or oil pressure to sending
unit controlling pressure with a control valve and
positive indicating gauge (Fig. 39).
With less than 13 P.S.I. ± 2 on the "Hornet"
and "Wasp" Series and 61/2 P.S.I. 11/2 "Rambler"
Series, the light will be on. Over this pressure,
the light will be off.
ELECTRIC GAUGES
The fuel level and temperature gauges (indicators)
are of the bi-metal type King Seeley Models.
"Hornet" and "Wasp" Series
Variable resistor type sending units are used for
fuel and temperature gauges. Because of this, a
voltage regulator is required.
The function of the instrument voltage regula-
tor is to recieve the variable voltage supply from