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 18 (TRAVELER MODULE)VEHICLE COMMUNICATIONS TESTSTEST 2A - BLANK DRB MESSAGE SCREEN
1984 Plymouth Horizon Base, 1.6 A
Test 2A - Blank DRB Message Screen
1984 Plymouth Horizon Base, 1.6 ASECTION Test 2A - Blank DRB Message Screen
WARNING: This page is about a different car, the 1994 Plymouth Acclaim, 1994 Dodge Spirit, and 1994 Chrysler LeBaron. 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 DIAGRAMS. After each repair, perform TEST VER-1.
- Disconnect DRB. Using an external voltmeter, check voltage between chassis ground and Data Link Connector (DLC) terminal No. 2 Red wire. DLC is located under dash, left of steering column. If voltage is less than 10 volts, repair Pink wire or Red wire as necessary.
- If voltage is more than 10 volts, turn ignition off. Using an external ohmmeter, check resistance between chassis ground and DLC terminal No. 6 (Black/Light Green wire). If resistance is more than 20 ohms, repair open in Black/Light Green wire.
- If resistance is less than 20 ohms, try a different DRB adapter cable. If DRB screen is no longer blank, replace defective DRB adapter cable.
- If DRB screen is still blank, try a different DRB cartridge. If DRB screen is no longer blank, replace defective DRB cartridge. If DRB screen is still blank, replace defective DRB.
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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.