Case 435, Repair Manual

Page: 240 / 252

DISTRIBUTION SYSTEMS - LIGHTING SYSTEM
Turn/hazard light Turn switch - Testing (A.40.A.13.83 - G.40.A.20)
435, 445, 445CT
NOTE: For wiring diagram refer to Wiring harness - Electrical schematic frame 20 (A.30.A.88 - C.20.E.20)
N° Test Point Expected Result Other Result (Possible Cause)
1 Turn the key switch to the ON
position.
Terminal for wire 759A (P) to ground.
12 volts Check the circuit between the
fl asher switch and the 10 amp fuse
in the options fuse block. Also check
the 10 amp fuse in the options fuse
block
2 Place the hazard switch on the ON
position.
Terminal for wire 758B (P) to ground.
12 volts Bad hazard switch.
3 If the readings are correct and the
indicator lamp on the hazard switch
does not illuminate, proceed to the
following test.
Terminal for wire 178BM (B) to
ground.
Continuity Bad ground circuit for hazard switch
indicator lamp.
If the readings are correct and the
indicator lamp on the hazard switch
doe not illuminate, replace the
hazard switch.
Turn/hazard light Flasher unit - Testing (A.40.A.13.86 - G.40.A.20)
435, 445, 445CT
NOTE: For wiring diagram refer to Wiring harness - Electrical schematic frame 20 (A.30.A.88 - C.20.E.20)
N° Test Point Expected Result Other Result (Possible Cause)
1 Terminal for wire 178FA to ground. Continuity Bad ground circuit.
2 Turn the key switch to the ON
position.
Terminal for wire 751FA (R) to
ground.
12 volts Check the circuit between the
fl asher and the 10 amp fuse in the
options fuse block. Also check the
10 amp fuse in the options fuse
block.
3 Place the hazard switch in the ON
position.
Terminal for wire 758FA (P) to
ground.
Intermittent 12 volts Check the circuit between the
fl asher and the fl asher switch. Also
check the fl asher switch.
4 Terminal for wire 757FA (P) to
ground.
Intermittent 12 volts Bad fl asher.
Check diode in diode pack.
5 Terminal for wire 756FA (P) to
ground.
Intermittent 12 volts Bad fl asher.
Check diode in diode pack.
6 Terminal for wire 759FO (P) to
ground.
Intermittent 12 volts Bad fl asher.
7 Place the turn signal switch in the
left turn position.
Terminal for wire 756 to ground.
Intermittent 12 volts Check the circuit between the
fl asher and the turn signal switch.
Also check the turn signal switch.
Bad
fl asher.
8 Place the turn signal switch in the
right turn position.
Terminal for wire 757 to ground.
Intermittent 12 volts Check the circuit between the
fl asher and the turn signal switch.
Also check the turn signal switch.
Bad
fl asher.
1 04/05/2005
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