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Home >> Ford >> 1989 >> Thunderbird Base >> Repair and Diagnosis >> Suspension >> Electronic Suspension >> Auto Ride Control System >> Module Input Circuit Diagnosis >> Quick Test D29 >> Disconnect Brake Switch
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Disconnect Brake Switch

Turn ignition off. Disconnect brake pressure switch at the proportioning valve. Check wires at brake pressure switch connector for damage. If wires damaged, repair as necessary. If no problems, proceed to QUICK TEST D30.