Nissan Repair: Car wont start?, fuses, valet

Question
Hi, I had to replace my batteries this morning but the guy inverse the poles, and blew my 75 amps fuse... Replace the batteries and the fuse... Everything was ok, but I went to check in later the same night and there is no way the car will start. What could it be? By the way, I have an ''anti-start'' install on my car. Thanx in advance

Answer
P-H,

If the battery was hooked up incorrectly there are probably more fuses blown and the power feed to the starter is probably melted.  Check the fuses first and then the wires that feed to the starter.  You can put your aftermarket alarm in valet to remove it from the equation and just deal with the battery reversal problem as indicated above.