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PIPER CHEROKEE WARRIOR SERV I C E M A N U A L
c. Remove the two bolts securing the overvoltage relay in place and remove the relay for testing.
(See Paragraph 11-60.)
11-66. INSTALLATION OF WICO 14 VOLT OVERVOLTAGE RELAY.
a. Position the overvoltage relay and secure with two bolts previously removed.
b. Reconnect the two electrical leads and secure with appropriate screws.
11-67. LAMAR 14 VOLT REGULATOR OVERVOLTAGE CHECK
The Lamar regulator has an incorporated overvoltage relay. To check relay operation use the same
test connections as testing the regulator, except the R end of resistor must be connected to the RED
wire at the regulator harness connector or terminal block. (Refer to figure 11-46.) Test as follows:
a
Increase voltage to circuit slowly. Monitor both V1 and V2 until V2 suddenly drops.
b
Sudden V2 voltage drop indicates overvoltage circuit has tripped.
c
Overvoltage control is set to operate between 16.0 volts and 19.0 volts. If overvoltage control
does not operate between values indicated it must be replaced.
11-68. CHECKING LAMAR 14 VOLT OVERVOLTAGE RELAY
Test relay with a good quality, accurate voltmeter (20 volt scale), and a suitable power supply
(20 volt output), or sufficient batteries with a voltage divider to regulate voltage. Connect test equip-
ment as follows:
a.
Connect B to BAT of the overvoltage control.
b.
Connect B- to overvoltage control frame.
c.
Check connections are secure, and connected to a clean, bright surface.
d.
Connect voltmeter positive lead to BAT terminal of the overvoltage control.
e.
Connect voltmeter negative lead to overvoltage control frame.
Revised: February 28, 1995
Figure 11-46. Application of Wico Overvoltage Control
2F20
Island Enterprises
ELECTRICAL SYSTEM
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