Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET2005EQUINOX FWD V6-3.4L VIN FREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTIGNITION SYSTEMIGNITION RELAYTESTING AND INSPECTION
2005 Chevrolet Equinox FWD V6-3.4L VIN F
Ignition Relay: Testing and Inspection
2005 Chevrolet Equinox FWD V6-3.4L VIN FSECTION Testing and Inspection
IGNITION RELAY DIAGNOSIS
CIRCUIT DESCRIPTION
The ignition relay is normally an open relay. The relay armature is held in the open position by spring tension. When the ignition switch is turned to the Run or Start position, current will flow through the relay coil. A wire connected to the other end of the relay coil completes the path to ground. The electromagnetic field created by the relay coil overcomes the spring tension and moves the armature, allowing the relay contacts to close. The closed relay contacts allow current to flow from the battery to the following fuses:
- The Eng Controls fuse
- The Fuel INJ fuse
- The Elec Eng fuse
- The O2 Sensors fuse
- The Trans Sol fuse
- The ABS fuse
- The AWD fuse
When the ignition switch is turned to the OFF position, the electromagnetic field collapses. This action allows the spring tension to move the armature away from the relay contacts, which interrupts current flow to the fuses.
If the ignition relay fails to close, the engine will crank but will not run. The class 2 communications will be available with the use of a scan tool.
The ignition relay table assumes that the vehicle battery is fully charged. Refer to Battery Inspection/Test in Starting and Charging. Battery Inspection/Test
TEST
Steps 1-7:
Steps 8-18:
Steps 19-28:
Steps 29-37:
Steps 38-44:
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.