139-1
Electronic Control Unit (Forward/Backward - Stop)
Building instructions
The building instructions are on the official LEGO website. We do not host any instructions ourselves; the link below takes you to the official page.
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Parts list – 139-1 Electronic Control Unit (Forward/Backward - Stop)
6 lines, 9 pieces
| Image | Part | Name | Colour | Quantity | Note |
|---|---|---|---|---|---|
 | upn0313b | Control Unit, Train 4.5V Whistle Brick 4 x 8 x 2 with Forward/Stop/Reverse FunctionsElectronics | Trans-Clear | 1× | |
 | 236ac01 | Electric Connector, 2 Way Male Rounded Narrow Type 2 with Hollow PinsElectronics | Blue | 2× | |
| 236ac01 | Electric Connector, 2 Way Male Rounded Narrow Type 2 with Hollow PinsElectronics | Red | 2× | |
| upn0311b | Microphone, Train 4.5V 4 x 4 x 2 with Vertical Plug SocketsElectronics | White | 1× | ||
 | upn0312bc01 | Whistle, Train 4.5V, Adjustable with Yellow BaseElectronics | Black | 1× | |
![Part 74503 Wire 12V / 4.5V with Two Leads [Undetermined Length] in White](https://cdn.rebrickable.com/media/parts/photos/15/x466-15-d2588fde-efc4-4354-9c4b-2453fd6c76da.jpg) | 74503 | Wire 12V / 4.5V with Two Leads [Undetermined Length]Electronics | White | 2× |