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 DIAGNOSISSTARTING AND CHARGINGCHARGING SYSTEMTESTING AND INSPECTIONCOMPONENT TESTS AND GENERAL DIAGNOSTICSCOMPONENT TESTSCHARGE INDICATOR LAMP TEST
1990 Ford Ranger 4WD L4-140 2.3L SOHC
Charge Indicator Lamp Test
1990 Ford Ranger 4WD L4-140 2.3L SOHCSECTION Charge Indicator Lamp Test
NOTE: This test is only for vehicles equipped with charge indicator lamps.
OPERATION
With ignition switch in the off position, charge indicator lamp is off. With ignition switch in run (engine not running), charge indicator lamp is on. With ignition switch in run (engine running), charge indicator lamp is off except as noted above.
INSPECTION
1. If the charge indicator lamp does not light with the ignition key in the run position (engine not running), check the I wiring circuit (ignition switch to regulator I terminal) for an open circuit or burned out charge indicator lamp.
2. If the charge indicator lamp does not light, disconnect the wiring plug connector at the regulator and connect a jumper wire to the negative battery post cable clamp.
3. The charge indicator lamp should light with the ignition key turned to the run position (engine not running).
4. If the charge indicator bulb does not light, check the bulb for continuity and replace if necessary.
5. If the bulb is not burned out, an open circuit exists between the ignition switch and the regulator.
6. Check the 500 ohm resistor across the charge indicator light.
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.