Plymouth Horizon Guides
Comprehensive DIY maintenance and repair guides for the Plymouth Horizon (1978 - 1990).
Vehicle Repair Hub
Jump to the 1990 Plymouth Horizon repair hub for guides, wiring diagrams, codes, and more.
Factory Service Manuals
Browse all manuals →Plymouth Horizon Specs & Fitment
Browse all spec pages →🔋 Battery Location
Plymouth Horizon
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❄️ Coolant Type
Plymouth Horizon
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🧪 Fluid Capacities
Plymouth Horizon
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💡 Headlight Bulb Size
Plymouth Horizon
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🛢️ Oil Type & Capacity
Plymouth Horizon
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⚙️ Serpentine Belt
Plymouth Horizon
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⚡ Spark Plug Type
Plymouth Horizon
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🔘 Tire Size
Plymouth Horizon
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1990 Wiring Diagrams
Browse all wiring pages →Exact Wiring
1990 Plymouth Horizon A/C & Heater Wiring Diagram
Open the exact a/c & heater diagram cluster for this vehicle.
Exact Wiring
1990 Plymouth Horizon Airbag SRS Wiring Diagram
Open the exact airbag srs diagram cluster for this vehicle.
Exact Wiring
1990 Plymouth Horizon Alternator Wiring Diagram
Open the exact alternator diagram cluster for this vehicle.
Exact Wiring
1990 Plymouth Horizon Body Electrical Wiring Diagram
Open the exact body electrical diagram cluster for this vehicle.
Exact Wiring
1990 Plymouth Horizon Engine Management Wiring Diagram
Open the exact engine management diagram cluster for this vehicle.
Exact Wiring
1990 Plymouth Horizon Fuel Pump Wiring Diagram
Open the exact fuel pump diagram cluster for this vehicle.
Common Trouble Codes
Browse all DTC codes →Multi-System
B0001: Driver Frontal Stage 1 Deployment Control
Trouble code cluster tied to this vehicle’s airbag srs, alternator, instrument cluster diagnostics.
Multi-System
B0010: Passenger Frontal Stage 1 Deployment Control
Trouble code cluster tied to this vehicle’s airbag srs, alternator, instrument cluster diagnostics.
Multi-System
B1318: Battery Voltage Low
Trouble code cluster tied to this vehicle’s alternator, body electrical, starter diagnostics.
Multi-System
P0335: Crankshaft Position Sensor A Circuit
Trouble code cluster tied to this vehicle’s starter, wipers diagnostics.
Multi-System
P0562: System Voltage Low
Trouble code cluster tied to this vehicle’s alternator, instrument cluster diagnostics.
Multi-System
P0563: System Voltage High
Trouble code cluster tied to this vehicle’s alternator, headlight diagnostics.
Browse by Repair Type
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Frequently Asked Questions
- Can I do my own repairs on a Plymouth Horizon?
- Yes, many Plymouth Horizon repairs are DIY-friendly. Common jobs like oil changes, brake pads, air filters, and battery replacement can be done at home with basic hand tools. You can save $100–$400 per repair compared to a shop.
- What are the most common repairs for a Plymouth Horizon?
- The most common Plymouth Horizon repairs include oil changes, brake pad and rotor replacement, spark plug replacement, battery replacement, and cabin/engine air filter changes. These are standard maintenance items for any vehicle.
- How much can I save doing DIY repairs on my Plymouth Horizon?
- DIY repairs on a Plymouth Horizon typically save $80–$200 per job in labor costs alone. Over a year of routine maintenance, most owners save $300–$800 compared to dealership or independent shop pricing.
- What tools do I need to work on a Plymouth Horizon?
- A basic metric socket set, combination wrenches, jack and jack stands, a torque wrench, and common consumables like brake cleaner cover most Plymouth Horizon DIY jobs. Specialty tools are rarely needed for routine maintenance.
- Where can I find parts for my Plymouth Horizon?
- You can find Plymouth Horizon parts on Amazon with fast Prime shipping, at local auto parts stores like AutoZone or O'Reilly, or from online specialists. OEM part numbers help ensure correct fitment for your specific year and trim.