I changed the voltage regulator on my MF 135 with a Perkins gas engine. After plugging the wire plug into the regulator and connecting the battery cables I turned on the key switch and the gas gauge registered about 1/2 full (which is about right for amount of gas in tank). Turn key switch off and fuel hand goes to empty. Started the tractor and after about 5 minutes of use stopped and shut off engine. Gas gauge stays at 1/2 full. With the key in the off position the wire from the voltage regulator to the fuel gauge is still energized until the ground cable is removed from the battery then the fuel hand drops to empty. Put the cable back on the battery and the fuel hand goes back to 1/2 full. What is the answer to why this wire stays hot?
Thanks to all who reply
Thanks to all who reply