Check to see if you have rear brake lights when you step on the brakes, Because the interlock goes though the stop light switch https://partimages.genpt.com/largeimages/100986.jpg If you have no brake lights then the stop light switch has failed and needs replacement and it thinks your not stepping on the brake pedal. You can find a shop here to repair this www.repairpal.com/directory
Are you sure the battery is good? You need a tech to trouble shoot this with a meter starting from the ignition switch, Because if the ignition switch has failed changing parts won't fix the problem. You can find a shop here www.repairpal.com/directory
Will some one tell me what and where the neutral safety switch is.? ........The battery was fully charged overnight, just in case and no action from anything besides the main dash lights and all other lights. I then took it to a highly recommended mechanic in Norco where I live and he found the shifter linkage to the trans, was disconnected while in Drive, leaving the computer with no other choice but to keep me from starting the engine. . He fixed it in less than an hour. Turned out to be the cheapest fix at the doctors i ever have had.