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Test 58A - Identifying Warning Lamp Problems

NOTE: For connector terminal ID, see CONNECTOR IDENTIFICATION  . For wiring schematics, see WIRING DIAGRAMS  in this article. Perform TEST VER-1 - VERIFICATION PROCEDURE  after each repair.
NOTE: Oil pressure warning lamp and brake warning lamp cannot be actuated using scan tool.
NOTE: When actuating problem lamp, if scan tool displays NO RESPONSE FROM AIR BAG MODULE, see AIR BAG RESTRAINT SYSTEM article in the ACCESSORIES/SAFETY EQUIPMENT section.
  1. Using scan tool, actuate each instrument cluster warning lamp. If warning lamps turn on then off, actuator test passes. Go to next step. If actuator test fails, go to TEST 58B  .
  2. Stop actuation test. Identify faulty lamp. Perform appropriate test listed in DIAGNOSING WARNING LAMP PROBLEMS table. If no warning lamp problems exist, system is operating properly at this time.
DIAGNOSING WARNING LAMP PROBLEMS

Malfunctioning Lamp Perform
Air Bag (1)
Charging System (2)
Coolant Temperature TEST 65A 
Cruise Control (3)
Low Fuel Level TEST 67A 
Oil Pressure TEST 70A 
Malfunction Indicator (4)
Parking Brake TEST 73A 
PRNDL Indicator TEST 59A 
Seat Belt TEST 71A 
(1) See AIR BAG RESTRAINT SYSTEM article in the ACCESSORIES/SAFETY EQUIPMENT section.
(2) See GENERATORS & REGULATORS article in the STARTING & CHARGING SYSTEMS section.
(3) See CRUISE CONTROL SYSTEM article in the ACCESSORIES/SAFETY EQUIPMENT section.
(4) See TESTS W/CODES article in the ENGINE PERFORMANCE section.
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