Hyundai Accent 94

who knows how I can repair a gasoline pump and how to know what the cables are to connect

The fuel pumps are not repaired, replacement !! As the prefilter and hoses, cable connections is by a file, the cables are identified by their color: GROUND: Red: 12V and Black: MASS.

It is true benzine pumps, not only the oil companies are repaired, it is better to change them and already, the identification of cables is very simple in these pumps are only two for the current and mass pump, there is not much to get lost, in addition, usually the pumps in their connector bring a positive mark.