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Mercedes Benz
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1989
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560SL
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Repair and Diagnosis
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Brakes
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Anti-Lock Brake System
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Testing
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Test 6
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Testing Insulation Resistance Of Speed Sensor
Testing Insulation Resistance Of Speed Sensor
Follow TEST 5, step 1). Push ground button. Insulation resistance should be greater than 20,000 ohms.
If not, check for grounded speed sensor, cable and line connector, or coaxial plug.