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 MANUALSFORD1987AEROSTAR VAN PASSENGER, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)ELECTRICALGAUGESINSTRUMENT PANEL - STANDARDTESTINGTEMPERATURE GAUGE
1987 Ford Aerostar Van Passenger, Standard
Temperature Gauge
1987 Ford Aerostar Van Passenger, StandardSECTION Temperature Gauge
- Disconnect connector from temperature sender and connect to Gauge Tester (Rotunda 021-00038). Attach other tester lead to ground on vehicle. Turn ignition to "ACC" position. Turn tester switch to "IVR CHECK" position. A flashing light indicates IVR and wiring are functional.
- Place tester switch in either "HIGH" or "LOW" position. Center line of pointer should be within "H" or "C" (White temperature level) test band. If okay, indicating system is operating properly and sending unit requires replacement. If center line is outside White band, replace IVR and retest. If outside upper White band, replace gauge and retest.
NOTE:
If system still does not operate properly, check coolant, thermostat and fan belt tension.
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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.