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14-Pin Machine Output Test Box (Deutsch HD Series)
Meet our custom-designed 14-pin machine output test box built for skid steer loaders equipped with a 14 Pin Deutsch HD series connector. I built my first version of this tool over 20 years ago to troubleshoot machine controls faster—and it quickly became one of those “never let it leave the shop” tools.
Many manufacturers don’t clearly document which cab buttons map to which functions. This test box makes that simple by helping you verify machine control outputs and understand how each button is mapped. It checks every pin in the standard 14-pin connector used on modern machines, and it can save you serious time by proving whether an issue is in the machine controls—or somewhere else.
Works with the following machines:
John Deere Note: This test box can be used on John Deere machines by relocating the ground wire:
Open the 14-pin connector from the back, remove the wire in Pin A. Remove the black wire in Pin B and move it into Pin A. The wire originally in Pin A will not be used when testing John Deere machines because John Deere uses Pin A as ground.
This is an essential tool for shops—and for anyone who wants to confidently troubleshoot their machine and truly understand how their controls operate.
This test box is designed to help you troubleshoot and verify the electrical outputs on 14-pin Deutsch HD series skid steer loaders. It helps confirm whether your machine controls are working and which cab buttons/controls activate which pins.
It works with many 14-pin Deutsch HD-equipped machines, including Old Bobcat 14-pin (not the newer 7-pin CAN), Case, Gehl/Mustang, Cat D-Series, Kubota, New Holland, Takeuchi, Yanmar, some newer ASV models using 14-pin, Manitou, Develon, and Hyundai.
Yes, but John Deere requires a ground-pin change in the 14-pin connector (moving the black ground wire from pin B to pin A). This allows proper testing on John Deere machines.
No. If you modify the connector for John Deere by moving the ground, it becomes dedicated to John Deere testing and will no longer be compatible with other brands unless you restore the original wiring.
It helps you quickly confirm whether the machine is providing the correct power/trigger signals on each pin, and it helps identify how the machine’s buttons and switches are mapped to the 14-pin outputs.
It reduces guesswork and speeds up troubleshooting by letting you verify machine-side outputs before blaming attachment wiring or adapters—especially helpful when diagnosing whether the issue is the machine or the harness.
Yes. It is designed to map and test every pin in the standard 14-pin layout used on modern 14-pin machines, including extended control pins used on certain specialty applications.
No. This is for 14-pin Deutsch HD machines. It does not work with the newer Bobcat 7-pin CAN connector systems.
No. It is not compatible with 8-pin machines such as older Cat A/B/C Series, many ASV/Terex 8-pin machines, or other 8-pin-only setups.
No programming is required. You simply connect it to the machine’s 14-pin port and use it to observe/verify which outputs activate when you press the controls in the cab.
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