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 MANUALSPLYMOUTH1984HORIZON BASE, 1.6 AREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 27 (ANTI-LOCK BRAKE SYSTEM)SELF-DIAGNOSTIC TESTSTEST 16A: SYSTEM RELAY CIRCUIT
1984 Plymouth Horizon Base, 1.6 A
Test 16A: System Relay Circuit
1984 Plymouth Horizon Base, 1.6 ASECTION Test 16A: System Relay Circuit
WARNING: This page is about a different car, the 1994 Plymouth Sundance, 1994 Plymouth Acclaim, 1994 Dodge Spirit, 1994 Dodge Shadow, and 1994 Chrysler LeBaron. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
For connector terminal identification, refer to CONNECTOR IDENTIFICATION . For wiring diagrams, refer to WIRING DIAGRAMS .
- Using DRB, actuate ABS relay. If ANTI-LOCK light on instrument panel switches on and off, go to TEST 16C. If ANTI-LOCK light on instrument panel does not switch on and off, go to next step.
- Remove ABS relay. See Figure. Using an external ohmmeter, check resistance between ABS relay terminals No. 30 and 87. If resistance is less than 10,000 ohms, replace ABS relay. Perform TEST VER-1A: SYSTEM VERIFICATION TEST . If resistance is more than 10,000 ohms, go to next step.
- Put DRB in voltmeter mode. Using DRB, check voltage on Red/Light Blue wire at ABS relay connector. If reading is less than one volt, go to TEST 16B. If voltage is more than one volt, go to next step.
- Turn ignition off. Disconnect CAB 60-pin connector. Turn ignition on. Using DRB, check voltage on Red/Light Blue wire at ABS relay connector. If any voltage is present, repair short to power in Red/Light Blue wire. Perform TEST VER-1A: SYSTEM VERIFICATION TEST . If voltage does not exist, replace CAB. Perform TEST VER-1A: SYSTEM VERIFICATION TEST .
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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.