EDI DIAGNOSIS SERVICE MANUAL NUMBER 22
Page 5E-56 90-860074--1 FEBRUARY 2002
Glow Plug Lamp (Glow Plug Display)
MODELS WITH LATE (21 PIN) CONNECTOR
NOTE: Functional only if the engine is equipped with a Glow Plug System.
Scan Code:
P1645
Blink Code: 1411
Malfunction Indicator Lamp: OFF
ECM
75476
BLK/YEL
75305
3
BLU/TAN
d
e
6
2
3
1
BLK
RED
BLU/TAN
BLK
RED
RED
RED
RED
BRN
BLK
ORN
ORN
YEL/RED
BLU/BLK
PPL/YEL
PPL
YEL
TAN
GRN
PPL/YEL
GRY
BLK
K
PPL
PPL
a
b
c
f
a-Electrical Box
b-Pin K of Instrumentation Harness 21 Pin Connector
c-Pin 6 of ECM 12 Pin Harness Connector
d-Glow Plug Lamp
e-Instrument Panel
f-ECM Supplied Ground Circuit
CIRCUIT DESCRIPTION:
The Glow Plug Lamp is controlled by the ECM. The lamp is supplied 12 volts with the key
in the ON/RUN position. A ground (–) path is closed when the ECM is operating the relays
for the glow plugs and the lamp is illuminated.
CKT PIN
NAME
3 ECM controlled Ground (–) for dash panel Glow Plug Lamp
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