NOTE: Make all voltmeter connections at component terminal rather than at cable or wire end.

Disconnect inertia fuel shutoff switch. Inertia fuel shutoff switch is located behind right rear quarter panel. Connect remote starter switch between starter solenoid terminal "S" and positive battery post. See Fig 1. Go to next step.
Using a digital voltmeter set at lowest voltage scale, connect positive voltmeter lead to starter housing, and negative lead to negative battery post. Engage remote starter switch while observing voltmeter. If voltage is .2 volt or less, go to next step. If voltmeter indicates greater than .2 volt, clean negative cable connections at battery and engine and recheck voltage drop. If voltage is still greater than .2 volt, repair or replace negative battery cable and/or engine ground cable as necessary. Repeat starter circuit test after repair to ensure problem has been corrected.
Ground circuit is okay. If starter motor cranks slowly, install new starter motor. See STARTER MOTOR under REMOVAL & INSTALLATION.

Fig 1: Testing Ground Circuit

Courtesy of FORD MOTOR CO.

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.

Safety Warning

Starter Ground Circuit Test