Case 445CT - Marker Light Indicator Lamp - Testing (A.40.A.12.84 - G.40.A.20); 435, 445, 445 Ct; Marker Light Switch - Testing (A.40.A.12.83 - G.40.A.20)

DISTRIBUTION SYSTEMS - LIGHTING S YSTEM
Marker light Indicator lamp - Testing (A.40.A.12.84 - G.40.A.20)
435, 445, 445CT
NOTE: For wirin g diagram refer to Wiring harness - Electrical schematic frame 07 (A.30.A.88 - C.20.E.07)
N°
Te st Point Expected Result
Other Result (Possible Cause)
1
Termin al for wire 178G (B) to
ground.
Continuity
Bad ground circuit.
2Bulb
Good
Bad bulb.
3
Turn the key switch to the ON
position.
Push and release the light button on
the instrument cluster.
Termin al fo r wire 706B (P) to ground.
12 volts
Check the circuit bet ween the rear
position lamps a nd th e light relay
No. 2. Also c heck the light relay No.
2.
Marker light Switch - Testing (A.40.A.12.83 - G.40.A.20)
435, 445, 445
CT
NOTE: This test procedure is for testing the Marker Light Instrument Cluster Output. For wiring diagram refer to
Wiring harness - Electrical schematic frame 07 (A.30.A.88 - C.20.E.07)Wiring harness - Electrical schematic
frame08(A.
30.A.88 - C.20.E.08)
N°
Te st Point Expected Re
sult
Other Result (Possible Cause)
1
Turn the key
switch to the ON
position.
Instrument c luster pin 23 or 24 or
the termin
al for wires 300G (R) o r
300H (R) to ground.
Approximately 12 volts
Check the ci
rcuit between the
instrument cluster and the 15 amp
fuse in the primary fuse block. Also
check t he 1
5 amp fuse in the fuse
block.
Also check the main power relay.
2
Push and release the ROAD lamp
button on the instrument cluster.
Instrumen
tclusterpin21orthe
terminal for wires 781A (P) to
ground.
Approxima
tely 12 vo lts
Bad instru
ment cluster output.
3
Push and release the WORK lamp
button on the instrument cluster.
Instrume
nt cluster pin 22 or the
terminal for wires 782A (P) to
ground.
Approxim
ately 12 volts
Bad instr
ument cluster output.
1 04/05/2005
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