2002 Ford Explorer

Engine Performance problem
2002 Ford Explorer 6 cyl Four Wheel Drive Automatic 100000 miles

every time I start my truck and I push buttion that said " 4 wheel drive high" as I see on dash broad that yellow light said " 4 wheel drive high" on then I start drive about over 30 m.P.H. Then the dash broad " 4 wheel drive high" went off on me so I hit buttion " 4 weehl drive high" then yellow light come on but if I go over 30 m.P.H. Then it stud down the 4 wheel drive. As I have snap on computer obd-II and I got the 3 differant codes that said B1134 faulty control module. And other one siad P1812 4WD mode Select switch circurt faulty. And other codes said B1322 LF door adjar Circuit short ground. I want to repair my self which it will saves me alot money. It is possble that 4 wheel drive module is no good? And what about the control switch? Let me know
June 3, 2008.

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