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This adapter enables you to run John Deere 3-pin attachments using a loader equipped with an 8-pin CAT/Terex/ASV ABC-Series machine-side electrical connector. Plug the 8-pin end into your machine’s output, connect the 3-pin side to your Deere attachment harness, power the loader, and control the attachment via your factory auxiliary circuit — no rewiring needed.
It’s a simple, plug-and-play solution for integrating older Deere-style attachments onto compact track loaders or skid steers that use the ABC-Series 8-pin electrics, making mixed-brand attachment setups easier and faster to swap.
The 8-pin ABC-Series output on your machine provides a standard set of circuits. This adapter taps those circuits and routes power and control through the 3-pin John Deere-style harness so your attachment can operate correctly.
Since John Deere 3-pin attachments typically require only two switched outputs, this adapter supports those basic functions — suitable for simple attachments that don’t need multiple circuits.
This adapter is designed for ABC-Series 8-pin machine-side electrics (common on many CAT, ASV, and Terex loaders) and attachments built for John Deere 3-pin harnesses. If your attachment requires more than two switched outputs, or uses a different plug standard, this adapter will not supply additional circuits.
Always confirm your attachment’s connector type and wiring before purchase and installation.
For wiring diagrams, compatibility checks, and setup instructions, download the generic adapter manual:
Download the Generic Machine-to-Attachment Adapter User Manual (PDF)
This adapter is built using standard Deutsch-style connector components and wired according to factory standards. However, because many attachments (especially used or second-hand) may have been rewired or modified, and because machine electrical outputs vary by model and factory options, we cannot guarantee every attachment will function as expected.
Always verify pin-outs and wiring before applying power. For any required pin modifications, use proper Deutsch tools and follow safe installation practices. If uncertain about wiring or compatibility, consult a qualified technician.
This adapter lets you connect a loader with a CAT (ABC-Series), Terex, or ASV 8-pin machine-side port to an attachment that uses the John Deere 3-pin control harness. It converts the machine’s 8-pin output into the 3-pin wiring format required by the John Deere-style attachment.
It’s compatible with skid steers or loaders using a CAT/ASV/Terex 8-pin electrical output and with attachments designed to operate via a John Deere 3-pin control connector. Make sure your attachment uses the 3-pin plug standard before ordering.
No. The adapter is plug-and-play. Simply plug the 8-pin connector into your loader and plug your attachment’s 3-pin harness into the adapter — no cutting, splicing or re-wiring needed.
Because a John Deere 3-pin harness only supports two switched outputs through the 3-pin connection, this adapter allows basic functions such as simple on/off operations (e.g., basic hydraulic or accessory control). Advanced attachment functions that require more circuits may not be supported.
Yes — installation is straightforward. Plug the adapter into your loader’s 8-pin port, then connect your attachment’s 3-pin plug to the adapter output. No tools or wiring changes are required.
Given the limited outputs through the 3-pin harness, it’s best used with attachments that only need simple controls or low-functionality operations. Heavy-duty or complex attachments often require more circuits and may not function properly through this adapter.
Yes. As long as the machine has a CAT/ASV/Terex 8-pin port and the attachment uses a John Deere 3-pin plug, the adapter can be swapped between different machines or attachments without modification.
First ensure both connectors are fully seated and locked. Confirm that your attachment uses the correct 3-pin wiring standard. If functions fail, the issue may be due to wiring incompatibility or the attachment requiring more circuits than the adapter provides.
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