Savana 3500 V8-4.8L (2009)
3. Test for infinite resistance between the following terminals:
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30 and 86
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30 and 87
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30 and 85
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85 and 87
‹› If not the specified value, replace the relay.
4. Install a 30-amp fused jumper wire between relay terminal 85 and 12 volts. Install a jumper wire between relay terminal 86 and ground. Test for
less than 2 ohms between terminals 30 and 87.
‹› If greater than the specified range, replace the relay.
Rear Window Defogger Grid Test
1. Ignition ON, turn on the rear window defogger.
2. Verify that a test lamp illuminates between each rear window defogger grid line and ground. The test lamp should be off when testing at the
ground side of the grid and get brighter as the test lamp moves closer to the voltage supply side of the grid. The test lamp should be dim when
testing each grid line in the middle.
‹› If the test lamp remains bright at the middle of the grid line, test for an open between the test point and the ground side of the grid.
‹› If the test lamp remains off at the middle of the grid line, test for an open between the test point and the voltage supply side of the grid.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Diagnostic Trouble
Code Tests and Associated Procedures/Verification Tests and Procedures) after completing the diagnostic procedure.
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Rear Window Replacement (See: Windows/Window Glass/Rear Door Window Glass/Service and Repair/Rear Window Replacement)
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Relay Replacement (Attached to Wire Harness) (See: Power and Ground Distribution/Power Distribution Relay/Service and Repair/Relay
Replacement (Attached to Wire Harness))Relay Replacement (Within an Electrical Center) (See: Power and Ground Distribution/Power
Distribution Relay/Service and Repair/Relay Replacement (Within an Electrical Center))
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Control Module References (See: Testing and Inspection/Programming and Relearning) for HVAC control module replacement, setup, and
programming
