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 MANUALSFORD1990RANGER 4WD L4-140 2.3L SOHCREPAIR AND DIAGNOSISLOCATIONSSPLICE LOCATIONSS100 - S129
1990 Ford Ranger 4WD L4-140 2.3L SOHC
S100 - S129
1990 Ford Ranger 4WD L4-140 2.3L SOHCSECTION S100 - S129
Splice S100: Engine Control Sensor Harness
Splice S101: Engine Control Sensor Harness
Splice S102: A/C Thermostat To Clutch Harness, Near A/C Compressor Clutch Diode
Splice S103: Dash Panel To Headlamp Harness
Splice S104: Dash Panel To Headlamp Harness
Splice S105: Dash Panel To Headlamp Harness
Splice S106: A/C Thermostat To Clutch Harness, Near A/C Compressor Clutch Diode
Splice S107: Engine Control Sensor Harness
Splice S108: Engine Control Sensor Harness
Splice S109: Dash Panel To Headlamp Harness
Splice S110: Dash Panel To Headlamp Harness
Splice S111: Dash Panel To Headlamp Harness
Splice S112: Engine Control Sensor Extension Harness
Splice S113: Dash Panel To Headlamp Harness
Splice S114: Dash Panel To Headlamp Harness
Splice S115 (2.9L/V6-177): Engine Control Sensor Harness, Near Ignition Suppression Resistor
Splice S115 (4.OL/V6-244): Engine Control Sensor Harness, Near Barometric Manifold Absolute Pressure Sensor
Splice S116: Engine Control Sensor Harness
Splice S117: Fuel Charge Harness
Splice S118: Engine Control Sensor Harness, Near Fuel Pump Relay
Splice S119: Engine Control Sensor Harness, Near Mass Air Flow Sensor
Splice S120: Engine Control Sensor Harness, Near DIS Shorting Bar
Splice S121: Fuel Charge Harness
Splice S122: Engine Control Sensor Harness
Splice S123: Engine Control Sensor Harness, Near Primary Coil
Splice S124: Engine Control Sensor Extension Harness, Near Crankshaft Position Sensor
Splice S125: Engine Control Sensor Extension Harness, Near Secondary Coil
Splice S126: Engine Control Sensor Harness
Splice S127: Engine Control Sensor Harness, Near Fuel Pump Relay
Splice S128: Engine Control Sensor Harness, Near Grommet On Safety Wall
Splice S129 (2.3L/4-140): Engine Control Sensor Harness
RENDER: 1.0x
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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.