Purchase a small 12 volt DC relay from Radio Shack or any electrical shop. A relay is a switch which consists of two low current terminals and two high current terminals. The flow of current through the low current side trips an internal switch to flow current through the high current side. Mine is located right on top of the solenoid. The wires attached to the terminals hold it in place.

To install:

(Turn off the main battery switch) First disconnect from the selenoid the wire coming from the starter button. Connect this wire to a low side terminal on the relay. With a new wire ground the other low side relay terminal.

Next run a short new wire from the starter terminal (the one with the heavy red wire running to the battery). This is likely right below the solenoid. Connect this wire to a high current side relay terminal. With a new wire connect the other high side terminal to the solenoid.

Your job is complete. The solenoid will now get a strong current flow to enable it to turn on the starter and in turn your engine. This set up has worked every time for over four years.