PREVOST H3-41 Maintenance Manual page 207

Problem/Symptom
Defroster fan
functioning but no heat or
cooling available in the
driver area.
Low beam headlamps
and front flasher on left
side not functioning
Electric horn not
functioning
Low beam headlamps
and flasher on right side
not functioning
Probable Causes
Module AE47 is not powered
is
or is faulty
Module AE46 is not powered
or is faulty
Module AE48 is not powered
or is faulty
PA1621 Maintenance Manual All Series | Revised Sept 2019
SECTION 06: ELECTRICAL
Actions
1. Check the DIAGNOSTICS menu of
Driver Information
Select VIEW ACTIVE FAULTS and
ELECTRICAL. The message "No
Response ModA47, Active" indicates
a power problem on the module. (A
DL0 (BBUS MUX) network problem
would show the same message but
doesn't produce these symptoms).
2. Check / reset circuit breaker CB1
3. Check / replace fuse F45
4. Probe gray connector on module to
see if it is powered.
1. Check the DIAGNOSTICS menu of
Driver Information
Select VIEW ACTIVE FAULTS and
ELECTRICAL. The message "No
Response ModA46, Active" indicates
a power problem on the module. (A
DL0 (BBUS MUX) network problem
would show the same message but
doesn't produce these symptoms).
2. Check / reset circuit breaker CB10
3. Check / replace fuse F19
4. Probe gray connector on module to
see if it is powered.
1. Check the DIAGNOSTICS menu of
Driver Information
Select VIEW ACTIVE FAULTS and
ELECTRICAL. The message "No
Response ModA48, Active" indicates
a power problem on the module. (A
DL0 (BBUS MUX) network problem
would show the same message but
doesn't produce these symptoms).
2. Check / reset circuit breaker CB10
3. Check / replace fuse F21
4. Probe gray connector on module to
see if it is powered.
Display (DID).
Display (DID).
Display (DID).
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