Can a fuel pump drain the battery?
Can a fuel pump drain the battery? A: The only way the fuel pump could be draining the battery is if the fuel pump is running full time. And it would drain the battery within a few hours, not a week. A normal car battery has 48-64 ampere-hours of capacity, while a fuel pump draws, depending, 6-10 amps. What causes a fuel pump to not start? As far as I know, if your fuel pump runs continuously with the key on, engine not running, or not being cranked, the problem is in one of three places. 1. the FP relay...