Thanks a bunch! I think the connection is good, but I'll check. No buzz (although I know what that sounds like). And the RPM seems to not have anything much to do with it. After a few minutes of driving it has stopped blinking while idling at a stop-light, but then starts up again after a few minutes of driving....but I'll check it again.Does the harness have a good connection to the sender? Does the dash buzz at you as well? What RPM's does it occur at?