Q: Jumper cables crossed.The car wouldn't start. Found it was a fuse that blew which we replaced. The car turned on but then we had t

If you are very lucky, you may just need a battery. When you cross the jumper cables, you can do a lot of damage in the blink of an eye. If it just trashes the alternator and the battery, you have beaten the odds. You could try disconnecting the battery to see if it still goes dead. If it does, you may just need a battery. If it doesn’t go dead when disconnected, then you have a draw in the system. In your case, you might have damaged one or more diodes in one of the many control units that inhabit your car. Testing for an off key draw is time consuming and requires a pretty thorough knowledge of the car’s systems. You can have this thing checked out by a pro by contacting Your Mechanic. They can send a technician to your home or office to check out your battery drain and advise you as to the next step.