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 36 (ANTI-LOCK BRAKE SYSTEM)SELF-DIAGNOSTIC TESTSTEST 14B - MAIN RELAY/POWER CIRCUIT FAILURE
1984 Plymouth Horizon Base, 1.6 A
Test 14B - Main Relay/Power Circuit Failure
1984 Plymouth Horizon Base, 1.6 ASECTION Test 14B - Main Relay/Power Circuit Failure
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:
For connector terminal identification, see CONNECTOR IDENTIFICATION. For wiring diagram, see WIRING DIAGRAM.
- Turn ignition off. Disconnect CAB 37-pin connector. Inspect, clean or repair connector as necessary. Remove ABS relay. Inspect, clean or repair connector as necessary. Put DRB in ohmmeter mode. Using DRB, check resistance of Red/Dark Green wire at ABS relay connector terminal "D". If resistance is less than 5 ohms, repair short to ground in Red/Dark Green wire. Perform TEST VER-1A. If resistance is more than 5 ohms, go to next step.
- Using DRB, check resistance of Brown/White wire at ABS relay connector terminal "B". If resistance is less than 5 ohms, repair short to ground in Brown/White wire. Perform TEST VER-1A. If resistance is more than 5 ohms, go to next step.
- Reconnect and install all previously disconnected connectors, relays and fuses. Turn ignition on. Inspect ABS relay fuse. If fuse is okay, go to TEST 14C. If fuse is open, go to next step.
- Turn ignition off. Disconnect CAB from HCU. See Figure. Inspect 14-pin mating connection. If connection is faulty, repair as necessary. Perform TEST VER-1A. If connection is okay, go to next step.CAUTION: Ensure CAB 14-pin connection does not short to ground in following step.
- Ensure CAB 37-pin connector is connected to CAB. Turn ignition on. Inspect ABS fuse. If fuse is faulty, replace CAB. Perform TEST VER-1A. If fuse is okay, replace HCU. Perform TEST VER-1A.
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.