The fuel pump shut-off switch on a 1990 Dodge Dynasty is typically a safety feature designed to cut off fuel flow in the event of an accident. To reset it, locate the switch, which is usually found in the trunk area or near the fuel tank. If the fuel pump isn't working, check the switch for a reset button and press it to restore power. If issues persist, further diagnostics may be needed to check the fuel pump and electrical connections.
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