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 25 (INSTRUMENT PANEL (CONVERTIBLE))TESTINGSPEEDOMETER CIRCUIT TEST
1984 Plymouth Horizon Base, 1.6 A
Speedometer Circuit Test
1984 Plymouth Horizon Base, 1.6 ASECTION Speedometer Circuit Test
WARNING: This page is about a different car, the 1994 Chrysler LeBaron. However, it is still accessible from the selected car via links, so may be relevant.
- Using DRB, check distance sensor (speed sensor) for fault code and proper speed indication. see TESTS W/CODES - 3.0L article in ENGINE PERFORMANCE section. To check wiring circuit, remove instrument cluster from panel just enough to access speedometer connector on rear of cluster. Leave cluster harness connectors connected. See INSTRUMENT CLUSTER under REMOVAL & INSTALLATION.
- Turn ignition on. Using voltmeter, check for battery voltage across cluster speedometer ignition (center pin) and ground (bottom pins). See Fig 1 . Using ohmmeter, check for continuity between cluster distance sensor input pin and connector terminal of distance sensor (mounted to transaxle). Check for continuity of speedometer ground. See Fig 1 . If battery voltage and continuity exist, replace speedometer. If voltage and/or continuity do not exist, repair wiring as necessary.
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.