Car wont start has power hear relays when ignition is turned but engine wont crank

Hi this is Dusty, I'm one of the auto experts on RepairPal's Car Genius team. Yikes, that sounds like a real pain! I see you've replaced the starter and the alternator recently, but this may be as simple as the battery has failed. The audible indicators of the electronics coming on is a good sign, but that doesn't mean that the battery hasn't failed, it may just be too weak to handle the stresses required during start up. Several factors can cause a battery to fail, like age and the climate in your area. When things like that happen, I recommend starting with the simple things, and moving onward from there. If you have any questions, give us a call at (877) 913-1554