Electrical connections, especially those exposed to the outdoor elements, can be prone to corrosion. The corrosion can impede the flow of electricity and cause failure to the device that is being powered. Most often a basic cleaning on the male and female parts can remedy the dirty situation. Generally the male parts are pins or metal probes that fit into a female socket. Most outdoor electrical connectors are small and may require a small diameter metal brush. By following a basic method you can remove the corrosion and improve the connection.
Connect a memory saver unit to the vehicle according to the manufacturer’s instructions. Disconnect the negative battery cable, using a battery wrench.