I'm having trouble getting my car to start. I've narrowed the problem down to not getting spark. The thing is that only a few days ago it was just the opposite. I had spark but my fuel pump wasn't running. Only after I replaced the pump did i lose spark.

My question is since this car did have an after market alarm on it at one time, could there be a killswitch that could cause this? And if so, where and what color is that wire or wires

thanks for any advice you can give