I recently purchased a 65 mustang. need help?
Simple checks include checking the glove box light (if equipped) to make sure it's turning off and disconnecting any aftermarket accessories the prior owner may have installed.
After wards, if you still have a draw, you can usually pin point the cause by removing the fuses one at a time with the negative terminal disconnected and a test light across the bat terminal to the cable (be sure to close all of the doors when checking the test light).
A draw will lite the test light - when the draw is eliminated, the light will be extremely dim or out.