Where is the brain on a f250 ford pickup?

I have a 4X4 F-250 Ford Pickup that is a 1990. Can someone tell me where the brain is on the truck?Where is the brain on a f250 ford pickup?Look under the brake booster between the inside driver's fender and fire wall, you'll see the connectorWhere is the brain on a f250 ford pickup?on the driver's fender back by the brake booster.Where is the brain on a f250 ford pickup?p/side of steering column behind radio