My '51 GMC 3/4 ton was out of commission for about ten years. Have been working on it this summer, and have it running again. Had carburetor rebuilt, installed new fuel pump, and found a rebuilt generator on eBay and installed. But now it's making off and on contact with the push button start. Today I didn't get any contact. Used a screwdriver to jump the starter and it fired right up. Checked connection on push button and looks good and tight. But losing contact somewhere. New here and have searched, but didn't see anything related. What a great site!!