usa engine problem

[Mike Dorsch CJ&M r.r.]

Hello , I have a usa gp30 that will not pick up from the engineer front wheels or slider. the other 3 corners of the engine work fine . I swapped out the motor block with another engine and it still didn't work. I have the body shell off and using a voltmeter I tested from the main circut board and found that the rear pick ups were fine and the red wire on the other pick up was good also. The front black was dead . I tried jumping with a wire past the conector , going directly to the board and still no luck . I even re soldered the 2 wires and still nothing. I can't think of anything else to try . Anyone ever had this problem before ? Can someone tell me how the 4 wires coming off the motor block are used ?

[two tone]

Hi Mike,    Looking at your post  I would think that you have more than one component has failed on the circuit board,  If unit was mine I would be sending it back for service if in warranty for replacement. As you do not show in your bio where you are, if you do then someone may be local that can help to save sending unit for repair.           Hope this helps

[Mike Dorsch CJ&M r.r.]

 I decided to put it all back thgether and run it as is for now , making sure the wheels and sliders are clean totally . I ran it like that last year . This was one of my winter projects . Maybe someday i'll get another circut board and see what happens . Have fun !