PREVOST H3-41 Maintenance Manual page 208

SECTION 06: ELECTRICAL
Problem/Symptom
Rear flashers not
functioning
Stoplights and center
stoplights not functioning
Engine is overheating and
radiator fans do
engage
The A/C compressor
clutch does not engage
44 PA1621 Maintenance Manual All Series | Revised Sept 2019
Probable Causes
Module AE51 is not powered
or is faulty
Module AE52 or AE49 is not
not powered or is faulty
Module AE54 (or AE52) is
not powered or is faulty
Actions
1. Check the DIAGNOSTICS menu of
Driver Information
Select VIEW ACTIVE FAULTS and
ELECTRICAL. The message "No
Response ModA51, Active" indicates
a power problem on the module. (A
DL0 (BBUS MUX) network problem
would show the same message but
doesn't produce this symptom).
2. Check / reset circuit breaker CB8
3. Check / replace fuse F107
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 ModA52/ ModA49, Active"
indicates a power problem on the
module. (A DL0 (BBUS MUX) network
problem would
message but doesn't produce this
symptom).
2. Check circuit breaker CB5
3. Check / replace fuse F133, F134
4. CB201-CB208
5. Check the DIAGNOSTICS menu of
Driver Information
Select VIEW ACTIVE FAULTS and
ELECTRICAL. The message "No
Response ModA54, Active" indicates
a power problem on the module. (A
DL0 (BBUS MUX) network problem
would show the same message but
doesn't produce this symptom).
6. Check / reset circuit breaker CB5
7. Check / replace fuse F135
8. Probe gray connector on module to
see if it is powered.
Display (DID).
Display (DID).
show the same
Display (DID).