Jacobsen HR5111 Service And Repair Instructions page 232

ELECTRICAL SYSTEM
PROBLEM
4. Cab work lights do not
work.
5. Tail light does not work.
6. Turn signals (both) do not
work.
7. One turn signal does not
work.
8. Cab heater and wipers do
not work.
9. Heater fan does not work.
10. Wipers do not work.
SECTION 10B. FAILURE ANALYSIS
PROBABLE CAUSE
CAB CIRCUITS (Continued)
a. Bulb burned out.
b. Faulty wiring or bad electrical
ground.
c. Faulty light switch.
a. Bulb burned out.
b. Faulty wiring or bad electrical
ground.
c. Faulty light switch.
a. Bulb burned out.
b. Faulty flasher.
c. Faulty wiring or bad electrical.
ground.
a. Bulb burned out.
b. Faulty flasher.
c. Faulty wiring or bad electrical
ground.
a. Ignition switch OFF.
b. Faulty cab relay.
c. Faulty wiring or bad electrical
ground.
a. Ignition switch OFF.
b. 20 amp fan circuit breaker tripped.
c. Glow plug/light circuit breaker
tripped.
d. Faulty cab relay.
e. Faulty heater fan switch.
f. Faulty heater fan motor.
g. Faulty wiring or bad electrical
ground.
a. Ignition switch OFF.
b. 10 amp wiper breaker tripped.
c. Glow plug/light circuit breaker
tripped.
d. Faulty cab relay.
e. Faulty heater fan switch.
f. Faulty heater fan motor.
g. Faulty wiring or bad electrical
ground.
10B-6
REMEDY
a. Replace.
b. Test (Section 10C).
c. Test (Section 10G).
a. Replace.
b. Test (Section 10C).
c. Test (Section 10G).
a. Replace.
b. Replace.
c. Test (Section 10C).
a. Replace.
b. Replace.
c. Test (Section 10C).
a. Turn ON.
b. Test (Section 10H).
c. Test (Section 10C).
a. Turn ON.
b. Reset/test (Section 10J).
c. Reset/test (Section 10J).
d. Test (Section 10H).
e. Test (Section 10C).
f. Replace.
g. Test (Section 10C).
a. Turn ON.
b. Reset/test (Section 10J).
c. Reset/test (Section 10J).
d. Test (Section 10H).
e. Test (Section 10C).
f. Replace.
g. Test (Section 10C).