I have a 2011 mini cooper countryman with a crank no start issue. Initially the car stalled due to battery charging issues. Replace the battery since it wouldn't take a charge. Got a week out of it and it stalled again. Replaced the alternator and got a few more days but quit charging. Replaced the belt and charging again lasted a few days. Now it went crank no start. Fuel pressure is good. Relays and fuses all test out but no voltage found at the computer terminals or beyond. Is there a way for me to test the JBE to make sure it is the issue before I drop a ton to replace?