Another simple test is to check your interior lights. An alternator charges your battery when the 2015 Ford C-MAX is running. If the interior and dashboard lights come on brightly but slowly start to fade, then it indicates a problem whit the alternator. It demonstrates that the alternator cannot keep a charge when the 2015 Ford C-MAX is running. Start Dead Batteries - Safely jump start a dead battery in seconds with this compact, yet powerful, 2000-amp lithium battery jump starter - up to 40 jump starts on a single charge - and rated for gasoline engines up to 8.0-liters and diesel engines up to 6.0-liters..OPERATING TEMPERATURE : -4°F to +122°F (-20°C to +50°C) To rule out dead battery, your best course of action is to jump start your C-Max using jumper cables and a healthy battery from another vehicle, or using a battery booster if available. Requirements: The engine of both the vehicles should be off, and the transmission in Park. Where is the battery on a 2012-2017 Ford Focus, and how to jump start it. Where is the battery on a 2012-2017 Ford Focus, and how to jump start it. Positive jump start terminal on a Prius, located in a fuse box on the driver's side near the firewall. 1. With both engines powered off, connect the positive jumper cable to the positive battery terminal of the drained battery. 2. Connect the other end of the positive cable to the positive terminal on the good battery. How to jump start Ford C Max hybrid. Look in this video I show you how to properly jump start your Ford C Max hybrid and where the ground and the positive connections are under the hood. 577 posts · Joined 2019. #19 · Oct 13, 2020. You should never jump start a vehicle with jump leads connected to the negative terminal of the battery you are jumping as there is a risk of explosion. Perhaps this is why, with the Mk4 Mondeo, Ford motor company have made it impossible to do so. SteveyG. Over the past 2 years, I've had battery problems with the 12v battery. So, I bought one of those lithium battery startup devices from Costco to jump my C-Max. Attach leads to connectors under the hood and the electronics came alive and I was able to start the engine. This saved having to have the car towed to the dealer. MVKgD.