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Some engines are equipped with an alternator and regulator
to supply current to power head lights, tail lights, etc.
on recreation vehicles. Shown here is a typical wiring
diagram.
HEAD LIGHT
LIGHT
SWITCH
MAGNETO
GROUND
SWITCH
STOP LIGHT SWITCH
TAIL STOP LIGHT
MAGNETO
GROUND
HEAD & TAIL LIGHT
STOP LIGHT
CHECKING THE SYSTEM. At an idle speed (2600
R.P.M.) a slight dimming of the lights will be noticed,
This is normal and should not be considered faulty.
Before going into extensive checks, be sure to examine
the more basic causes first, such as:
1. Make sure bulbs are good and the right ones are
being used. Number 1157 for tail & stop light; 4416
or 4420 for head lights.
2. Corroded terminals.
3. Cracked wire insulation.
4. Broken wires.
5. Broken wires covered by insulation.
6. A wire grounding out the system.
7. Loose connections.
8. Make sure regulator has good ground.
9. Faulty Switch.
Check the regulator for resistance. If regulator checks
out and all bulbs and wiring are ok, replace alternator
coils.
Three types of regulators have been utilized. Use the
ohm readings in the chart below for the type that you
are servicing. Readings should be as follows:
Type A Type B Type C
100 to 200 Over 50,000 100 to 200
Ohms Ohms Ohms
ALTERNATORS
TYPE
B
TYPE C
RED LEAD
OHM METER
(MOUNTED ON BLOWER HOUSING)
VIEW FROM BOTTOM
VIEW FROM BOTTOM
TYPE A
OHM METER
RED
LEAD
(MOUNTED ON BLOWER HOUSING OR COVER PLATE)
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