Help!!!! Weird noise coming from engine!

[Darreola562]

Hello all,

Today I attempted to jump start my 72 c10 with a 5.7 carb engine. When I made a couple of attempts on starting it it would just click... after the 5th time I attempted to start it and it did but make a loud spinning/ screeching sound. I turned it off and the noise continued. I ran and got the cables detached from the battery and the noise stopped. I attempted once again to connect the cables and the noise begun right away even without the keys in the ignition. Anyone have an idea what this is?