The normal sunlight is boosted by a factor of eight--allowing the relatively small roof-mounted solar array, using SunPower cells, to gather enough light during a day's charging for a full battery Troubleshooting a no power issue. Might be a bad battery but I think the CPU is just powered down. Might need Ford to diagnose. No lights on the 2014 Ford C-MAX dashboard. If no lights coming on in the dashboard and no other electrical consumers work, the battery could be completely dead or there is no connection between the battery and the vehicle electrical system. Check if the battery terminals look tight. If the battery is completely dead, jump starting might help. 6.2. Brake pedal sinking to the floor. Another common braking system problem that some Ford Grand C-MAX owners have reported is a brake pedal that sinks to the floor. This issue could be caused by a variety of factors, including a leak in the brake system, a faulty master cylinder, or air in the brake lines. Reading through other owner's issues I see C-MAX has had lots of problems over the years (power steering, radio, battery, etc) - they all seem to have the common issue of "battery drain." A lot of the stuff is dated and my guess is there is a troubleshooting guide somewhere or perhaps someone here that can help me go through a few diagnostic When you push the start button on the C-Max, the battery voltage does jump up to 14+ volts. But the question is how long does one really want to crank the other vehicle with the other vehicle's starter motor draw through the DC/DC converter. The converter is cooled by the HV battery cooling fans. From the workshop manual, t he bold implies one 6. Electrical Issues in Ford C-Max 6.1 Battery drain or failure The Ford C-Max, particularly the hybrid and plug-in hybrid models, have a sophisticated electrical system that powers the vehicle's various components, including the battery and electric motor. As a result, issues related to the battery can be a common electrical problem in the C-Max. Next Generation 2018 Ford C-MAX Production Headed to China. By robertlane, July 9, 2015. c-max. 7 replies. 43,236 views. phil1336. JTGik.