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I'd start with checking all your grounds, making sure you got them and they have good connections. Approx 90% of all elelctrical problems are due to bad grounds and they can cause all sorts of weird things to happen.
You need a good ground from the battery to the frame, from the engine to the frame, and from the body to the frame. Looks can be decieving, take them loose and wire brush all the rust, scale, and paint from them and try again.
Rezvani's Latest Post-Apocalytic Monster Is a Ford F-150 Raptor Underneath
Slideshow: Called the Fortress, the 850-horsepower pickup combines Raptor underpinnings with military-inspired features, survival equipment, and a starting price of $285,000.