Electrical 2001 Mustang GT No Start

[Mustang GT83]

Good afternoon, I'm having the hardest time getting my 2001 Mustang Gt started. There are three black boxes underneath my dashboard and cut wires I have no idea where they belong can someone please help me.

 

[PSKSAM2]

Looks like someone spliced in a remote starter. Can you get mfg numbers and find the install guide? Then you could figure out what the 3 extra wires do and where they need to go.

I think that is an Auto Page RS727 poking out from behind the bundle of wires.

Amazon.com

Also, see a page for the 556U module, seems to be a Bypass for the Anti-Theft system.

Bypass Essentials 556UW Universal Bypass

Allows remote start in vehicles equipped with a transponder or radio-frequency based immobilizer

www.crutchfield.com