Recover Master Lock Code I Recently Asked About A Electrical Problem On A 02 Jeep Liberty, But No One Seem To Know The Problem?

I recently asked about a electrical problem on a 02 Jeep Liberty, but no one seem to know the problem? - recover master lock code

All functional electrical were in my Jeep Liberty 02 It is not operational, including CA, Power Locks, alarm input, light, odometer, tachometer, cruise control. All of these problems at a time. He stopped and went, but it started up again, without problem. The car in the engine check light. I have three different repair shops, mechanics, Pep Boys, and Dodge dealer. But none of them were able to find a solution. They claim that a teacher of superior technology, but I had to pay unanswered for the diagnostic service. Relays, fuses were all good. As the sensors, some of whom claim to the problem. I am a mechanic, but when it comes, electrical engineering and computer science proablem'm lost in space. In all these, IMay issue. I think, and in recognition of the BCM (control module) body. I can bet that the BCM can cause these problems. Now, with my guesses. To change the BCM has to, I can do myself? or do I return to the Dodge, Chrysler or dealer? I'm sure he must be given to retrieve lost codes. But I simply do not have a little juice portfolio you send it to the dealers. If someone can help, please help.