Section 6: ELECTRICAL
PA1553
39
7. CHARGING
SYSTEM
TROUBLESHOOTING
The troubleshooting of the charging system is
made easier by the use of a 12 and a 24 volt
voltmeter, “
BAT”
and
“ALT”
telltale lights
mounted in the dashboard (for location refer to
the
“Owner’s Manual”
).
7.1 ALTERNATOR
OR
VOLTAGE
REGULATOR
To determine which unit is faulty, proceed as
follows:
1. Start the engine and momentarily connect a
jumper from the “F1” field terminal to “DC
(+)” terminal. For connections, refer to figure
24.
CAUTION
Do not feed the alternator field “F1” terminal
for more than 10 seconds. High voltage could
burn out the wires and components of
charging system and seriously damage the
alternator. Do not jump the "F2 (-)" terminal
with the "DC (+)" terminal on the alternator.
This will result in a direct short circuit.
a) If the voltmeter readings increase, trouble is
located in the 24 volts regulator or wiring.
Check the regulator as explained under
"Voltage Regulator" later in this section.
b) If the voltmeter readings do not increase,
the problem may be in the alternator.
7.2 ALTERNATOR
DIAGNOSIS
CAUTION
Before checking the alternator, set the ignition
key switch to the OFF position.
It is not necessary to disassemble completely
the alternator to make electrical checks. All
electrical checks are made at the diode end of
the assembly without having to remove the rotor,
drive end frame or bearing. If the electrical
components are not defective but bearing
replacement is necessary, this can be done at
the drive end without having to disassemble the
diode end of the unit.
The components in the alternator that require
electrical checks are the field winding, the six
diodes, and the stator winding.
7.2.1 Diode
Checks
Each diode may be checked for shorts and
opens as follows:
1. Ensure the ignition key switch is set to the
“OFF” position.
2. Remove the pipe plug from underneath the
end housing to drain the oil in the rectifier
engine oil supply.
3. Remove the cap screws (7) and lock
washers that attach the diode end cover to
the end housing. Remove the end cover
from the end housing.
NOTE
Do not operate the alternator unless this unit
is completely reassembled.
4. Remove seal from the end housing, detach
and remove “DC” and relay terminals, stud,
insulating sleeves and O-rings.
5. Disconnect all diode flexible leads; i.e. three
from the output terminal stud and three from
the diode supports. See figure 25 for more
details.
Each diode may be checked for short or open
circuits with an ohmmeter.
NOTE
The ohmmeter polarity may be determined by
connecting its leads to the voltmeter leads.
The voltmeter will read up-scale when the
negative leads are connected together and the
positive leads are connected together. The
polarity of the voltmeter leads may be
determined by connecting the leads to the
identified terminals on a battery.
Summary of Contents for LE MIRAGE XLII
Page 1: ...COACH MANUFACTURER MAINTENANCE MANUAL LE MIRAGE XLII BUS SHELLS PA1553 ...
Page 2: ......
Page 12: ...Section 00 GENERAL INFORMATION 10 PA1553 FIGURE 13 METRIC US STANDARD CONVERSION TABLE 00005 ...
Page 13: ...Section 00 GENERAL INFORMATION PA1553 11 FIGURE 14 CONVERSION CHART 00006 ...
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Page 140: ...section01f tif 1700x2164x2tiff 10 ...
Page 141: ...section01f tif 1700x2164x2tiff 11 ...
Page 142: ...section01f tif 1700x2164x2tiff 12 ...
Page 143: ...The ONLY Motor Coach Power Choice ...
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Page 185: ...Section 04 EXHAUST SYSTEM PA1553 3 FIGURE 2 EXHAUST SYSTEM INSTALLATION W5 04013 ...
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Page 345: ...FAULT CODE MANUAL Created on 00 04 25 15 30 1 FAULT CODE MANUAL B7L B7TL B12 ...
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Page 492: ...Section 12 BRAKE AND AIR SYSTEM PA1553 20 FIGURE 38 AIR OPERATED BRAKING SYSTEM W0 WE ...
Page 493: ...Section 12 BRAKE AND AIR SYSTEM PA1553 21 FIGURE 39 AIR OPERATED BRAKING SYSTEM W5 ...
Page 500: ...Section 12 BRAKE AND AIR SYSTEM PA1553 28 FIGURE 46 ABS 4S 4M CONFIGURATION ...
Page 528: ...16 BW2158 Honeywell Commercial Vehicle Systems Company 4 2001 Printed in USA ...
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Page 1004: ...PROCEDURE NO PR00044 REVISION 00 Page 2 of 2 Slide out ...
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Page 1165: ...Section 22 HEATING AND AIR CONDITIONING PA1553 19 FIGURE 17 DOUBLE SWEEP EVACUATION SET UP ...
Page 1201: ...Section 22 HEATING AND AIR CONDITIONING PA1553 55 FIGURE 64 HEATER LINE SHUTOFF VALVES WE W0 ...
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Page 1209: ...Compressor 62 11052 Rev A WORKSHOP MANUAL for MODEL 05G TWIN PORT COMPRESSOR R ...
Page 1210: ...WORKSHOP MANUAL COMPRESSOR MODEL 05G TWIN PORT ...
Page 1233: ...Compressor 62 11053 Rev B SERVICE PARTS LIST for MODEL 05G TWIN PORT COMPRESSOR 1 2 3 4 5 6 R ...
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Page 1305: ...Section 26 XLII SLIDE OUT PA1553 11 ...
Page 1306: ...Section 26 XLII SLIDE OUT PA1553 12 FIGURE 16 KEYLESS BUSHING INSTALLATION INSTRUCTION ...