C 1500 Truck 2WD V6-4.3L VIN W (2001)
Ignition Relay: Testing and Inspection
IGNITION RELAY DIAGNOSIS
CIRCUIT DESCRIPTION
The ignition relay supplies ignition voltage to the following components:
^
Fuel Injectors
^
Ignition Coils
^
Powertrain Control Module (PCM)
^
Alternator/Generator.
DIAGNOSTIC AIDS
If the IGN relay fails open:
^
Scan data will be available.
^
Vehicle will crank, no start.
^
Dash indicator lights will illuminate.
TEST DESCRIPTION
Steps 1-6
