Canadian company Ballard Power Systems announced yesterday that it had signed a three-year, $22 million deal to provide Ford with fuel cells for a line of vehicles the automaker hopes to launch by 2004. Ballard is providing fuel-cell technology to DaimlerChrysler, Honda, Nissan, and Volkswagen, among others. General Motors expects to have a fuel cell-powered pickup truck ready for tests by the end of this year.