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Here are some suggestions to determine if your Drive-Alert System requires service. Most problems can be readily isolated. Intermittent, constant alarm When an intermittent or constant alarm occurs, disconnect the plug from the 120-volt power. Open the door to models DA-503 or DA-504 and disconnect the red and black sensor wires from the terminal strip. [...] When the DA-500′s built in Whistle is ON the relay will be putting out 24VDC. When the Whistle is set to OFF the relay is a dry contact relay meaning there is no voltage being output. |
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