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HOMESERVICE MANUALSPLYMOUTH1984HORIZON BASE, 1.6 AREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 20 (ENGINE CONTROLS - TESTS W/CODES - BODY CONTROL COMPUTER)SELF-DIAGNOSTIC TESTSTEST 4A - DIAGNOSING WARNING LAMP PROBLEMS
1984 Plymouth Horizon Base, 1.6 A

Test 4A - Diagnosing Warning Lamp Problems

1984 Plymouth Horizon Base, 1.6 ASECTION Test 4A - Diagnosing Warning Lamp Problems
WARNING: This page is about a different car, the 1994 Eagle Vision, 1994 Dodge Intrepid, 1994 Chrysler New Yorker, 1994 Chrysler LHS, and 1994 Chrysler Concorde. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Oil pressure warning lamp and brake warning lamp cannot be actuated using DRB.
  1. If a problem exists with oil pressure warning lamp, go to TEST 10A. If a problem does not exist with oil pressure warning lamp, use DRB to 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 4B.
  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

Problem Lamp Perform Test No.
Air Bag (1) *
Charging System (2) *
Coolant Temperature TEST 6A 
Cruise Control (3) *
Low Fuel Level TEST 8A 
Malfunction Indicator (4) *
Parking Brake TEST 13A 
PRNDL Indicator TEST 4C 
Seat Belt TEST 11A 
(1) See AIR BAG RESTRAINT SYSTEM article in the ACCESSORIES/SAFETY EQUIPMENT section.
(2) See ALTERNATOR & REGULATOR article in ELECTRICAL section.
(3) See CRUISE CONTROL SYSTEM article in ACCESSORIES/SAFETY EQUIPMENT section.
(4) See appropriate TESTS W/CODES article in the following ENGINE PERFORMANCE section. TESTS W/CODES - 3.3L , TESTS W/CODES - 3.5L
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.