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.
1999 Mercury Tracer LS, 4D Sedan, StandardFACTORY OEM SERVICE PROCEDURE
Test C: Single Mirror Inoperative With Switch Logic
- Turn ignition off. Disconnect mirror switch harness connector. Test mirror switch. See MIRROR CONTROL SWITCH under COMPONENT TESTS. If switch is okay, go to next step for driver mirror or step 3 for passenger mirror. If switch is defective, replace mirror switch.
- Turn ignition off. Disconnect mirror switch harness connector. Disconnect driver mirror harness connector. Measure resistance of Brown wire between mirror switch harness connector terminal No. 6 and driver mirror harness connector. Measure resistance of Brown/Yellow wire between mirror switch harness connector terminal No. 4 and driver mirror harness connector. If all resistance readings are 5 ohms or less, replace driver mirror assembly. See SIDE MIRROR ASSEMBLY under REMOVAL & INSTALLATION. If any resistance reading is greater than 5 ohms, repair open in appropriate wire.
- Turn ignition off. Disconnect mirror switch harness connector. Disconnect passenger mirror harness connector. Measure resistance between mirror switch harness connector terminal No. 3 (Brown/Black wire) and passenger mirror harness connector Black wire. Measure resistance of Brown wire between mirror switch harness connector terminal No. 6 and passenger mirror harness connector. If all resistance readings are 5 ohms or less, replace passenger mirror assembly. See SIDE MIRROR ASSEMBLY under REMOVAL & INSTALLATION. If any resistance reading is greater than 5 ohms, repair open in appropriate wire.
Factory Service Tools
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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.
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