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I have a GG1 that will only go forward and horn works and light in the direction it moves.  A QSI operating system without proto sound. It has 3 pc boards 1 set sandwiched together and by itself located in end by lockout switch. Any help would be appreciated.  Thank you  road no 4897   RK-2500

Roy

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When switch is in closed position, the logic of the DCRU is enabled.  At that point should cycle F-N-R-N-F.  I is not uncommon to have a DCRU failure of the logic chip or the transistor or relay.  So you have to work thru the issue.   The GG-1 is a unique engine due to size that MTH had to cut the DCRU in half and use wires to connect the 2 halves.  That is no longer available.  I do have one that works, came from a new engine that was upgraded.  You get both halves as wired.  My E-mail is in my profile it you need board.  G

PS Alan, giving generic info is not helpful.  Needs to be specific to the item.

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