Thread: How do you test an OVP Relay?
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Old 08-22-2010, 05:53 AM
Ferdman Ferdman is offline
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Join Date: Aug 2002
Location: Southeastern PA
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86 300E, when the OVP relay in my parents' 1995 E320 went bad it made a buzzing sound and the engine idled poorly. Fortunately I have a 1995 E320 and swapped my OVP relay to confirm the problem.

On a 1995 E320 the OVP relay is behind the battery. Not sure if it's the same location on your car.
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