87 F 150 starter turning with switch off

We have an 87 F 150 and it tries to crank itself with the switch off have changed Starter and Silonoid switch any help greatly appreciated:banghead:

sounds like the Silonoid is stuck was the problem happening before you changed the parts? if it was sounds like the hot wire that engerizes the starter silonoid is getting power all the time which means that the ingiton switch on the steering coulmn could be bad or there is a short to ground somewhere