Yesterday my 2010 Challenger would not start. It would crank but I could not hear the fuel pump. I assumed it was either a blown fuse or a bad relay and thought about swapping a relay if I knew which one it was. Since I was miles from away from getting help, I pulled out the owner's manual to check out the fuses and relays. In the owner's manual for the 2010 Challenger, there is no fuel relay listed or shown in either the engine fuse box or the trunk distribution box, only a fuel pump fuse. I checked the fuel pump fuse and it was good. I had no way to use the internet so I called the closest dealer and told them my problem. They offered no help over the phone other than recommending a tow company to get the car. As it turns out, it was a fuel pump relay, slot #46 in the trunk. So after a $125 flatbed ride to the dealer, they soaked me for another $303 to replace a fuel pump relay that is not shown at all in the owner's manual ($30 for the relay and $255.85 for labor/shop supplies, plus $17.15 tax). Had this relay been noted in the owner's manual, I could have swapped the bad relay with the #45 stop light relay, got the car running again and gone to an auto parts store where I could have bought a $16 replacement relay. So if you have a Challenger owner's manual with no relays shown in positions 45 and 46 and your fuel pump stops working, here the answer.