I took it for a drive today. I went out into the country. I got it up to 55 mph and then flipped the toggle switch. At 55 mph the tach read 2300 rpm, then it dropped down to 1800 rpm after I flipped the toggle switch. I think it's now working like it's supposed to. I'll have to learn how to wire the toggle switch though the brake pedal so it will disconnect from the brake pedal. Thank you for your help, it's much appreciated.