ELECTRICAL SYSTEM
SECTION 10B. FAILURE ANALYSIS
10B-4
PROBLEM PROBABLE CAUSE REMEDY
GAUGES AND PANEL LIGHTS (Continued)
3. Panel light does not come a. 10 amp gauge/panel light circuit a. Reset/test (Section 10J).
on when test switch is breaker tripped.
pushed to the ON position.
b. Battery dead. b. Charge/replace (Section 10D).
c. 50 amp tractor circuit breaker c. Test (Section 10J).
tripped.
d. Faulty ignition switch contacts X-Y. d. Test (Section 10G).
4. Engine water temperature a. 10 amp gauge/panel light circuit a. Reset/test (Section 10J).
gauge does not work or breaker tripped.
is erratic
.
b. Faulty gauge. b. Replace (Section 10K).
Ground LT GRN wire at
c. Faulty sending unit. c. Replace (Section 10K).
sending unit; gauge does
d. Faulty wiring or bad electrical d. Test (Section 10C).
not register, see b. Gauge
ground.registers, needle moves
e. Faulty wiring or bad electrical e. Test (Section 10C).
to the high side of scale.
ground.
5. Tachometer does not a. 10 amp gauge/panel light circuit a. Reset/test (Section 10J).
work or erratic. breaker tripped.
b. Sending unit not adjusted. b. Adjust.
c. Faulty sending unit. c. Replace.
d. Faulty tachometer. d. Replace.
e. Faulty wiring or bad electrical e. Test (Section 10C).
ground.
6. Hourmeter does not work. a. 10 amp gauge/panel light circuit a. Reset/test (Section 10J).
breaker tripped.
b. Faulty hourmeter. b. Replace.
c. Faulty wiring or bad electrical c. Test (Section 10C).
ground.
7. Fuel gauge does not work a. 10 amp gauge/panel light circuit a. Reset/test (Section 10J).
or erratic. breaker tripped.
Ground TAN wire at b. Faulty gauge. b. Replace (Section 10K).
sending unit; gauge does
not register, see b. Gauge
c. Faulty sending unit. c. Replace (Section 10K).
registers, needle moves d. Faulty wiring or bad electrical d. Test (Section 10C).
to the high side of scale. ground.
8. Engine oil pressure light a. No engine crankcase oil. a. Check (Section 11C).
does not go OFF when
b. Faulty sending unit. b. Replace.
engine is started.
Remove BLU wire at
c. Internal engine problem. c. Refer to Engine Manufacturer’s
sending unit; light goes
Manual.
OFF, see b and c. d. Faulty wiring or bad electrical d. Test (Section 10C).
Light stays ON, see d. ground.
9. Engine oil pressure light a. No hydraulic oil. a. Check (Section 11B).
does not go OFF when
b. Faulty sending unit. b. Replace.
engine is started.
Remove GRY/RED wire
c. Hydraulic system problem. c. See Section 8C.
at sending unit; light goes
OFF, see b and c.
d. Faulty wiring or bad electrical d. Test (Section 10C).
Light stays ON, see d.
ground.