Sudden loss of power

DOH !!! I hate when that happens. Break out the multi meter, do not disconnect the connector and check for power coming into bulkhead connector. If you read battery voltage, then check it on the interior side of the connector.If you read battery voltage there than move up to your amp gauge and check for voltage in, and out. If its the amp gauge, then simply splice them together thus eliminating the gauge altogether and perform the MAD electrical bypass Catalog. If you bypass the amp gauge ( which is recommended anyways ) you can install a volt gauge in or under you dash.Some members here have done some really nice volt gauge retrofits that will replace your AMP gauge and look perfectly stock, just do a search on here.