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 MANUALSMERCURY1987LYNX L, MTXIIIREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE MECHANICALSTARTERSTARTER - DIESELBENCH TESTSSTARTER NO-LOAD TEST
1987 Mercury Lynx L, MTXIII
Starter No-Load Test
1987 Mercury Lynx L, MTXIIISECTION Starter No-Load Test
NOTE:
The starter no-load test will determine such problems as open or shorted windings, rubbing armature, or a bent armature shaft.
- Connect positive lead of load tester to positive terminal of a fully charged battery. Connect negative lead of load tester to negative battery terminal. See Fig 1.
- Connect voltmeter leads of load tester to positive and negative battery terminals. Connect a jumper wire between negative battery terminal and starter frame. Connect a second jumper wire between positive battery terminal and battery "B" terminal of starter motor solenoid.
- Connect a third jumper wire between positive battery terminal and solenoid "S" terminal of the starter motor solenoid. Starter motor will run without any load.NOTE: Ensure that no current is flowing through ammeter (rheostat at maximum counterclockwise position).
- Disconnect jumper leads from starter motor. Reduce resistance of the rheostat until voltmeter reading is the same as when starter motor was running. Ammeter will now indicate starter no-load current draw. Current draw should be less than 190 amps.
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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.