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Decompose pictures
| Reference Number | Part Name | Description & Function |
|---|---|---|
| 1 | Main Connector Plug | Heavy-duty molded connector housing with multiple pin slots. Provides the primary electrical interface to the machine's main harness. |
| 2 | Solenoid Valve Connector (DIN 43650) | Industry-standard square connector with internal contacts. Attaches securely to the solenoid valve's electrical port. |
| 3 | Protective Wire Loom / Conduit | Flexible corrugated tubing that shields the internal wires from abrasion, heat, moisture, and debris. |
| 4 | Copper Conductor Wires | Multi-strand copper core wiring with color-coded insulation. Carries 24V DC power and control signals between components. |
| 5 | Rubber Grommets / Seals | Molded rubber sealing elements inside each connector. Prevent moisture, dust, and vibration from compromising electrical connections. |
| 6 | Terminal Pins & Sockets | Precision-crimped brass terminals with locking tabs. Ensure a secure, low-resistance electrical connection at every junction. |
| 7 | Branch / Splice Points | Junction nodes where the main trunk divides into individual circuit legs. Pre-taped and sealed for durability. |
| 8 | Mounting Clips / Brackets | Integrated plastic or metal clips that secure the harness along the machine's frame at designated routing points. |
Parts list
| Item | OEM Reference No. | COGENG Part No. | Description | Qty |
|---|---|---|---|---|
| 1 | GY21707 | CG-GY21707 | Wiring Harness Complete Assembly (Main Trunk with Branches) | 1 |
| 2 | — | CG-CONN-SET-GY | Replacement Connector Set (DIN Plug + Main Connector with Terminals) | 1 Set |
| 3 | — | CG-LOOM-10MM | Replacement Protective Wire Loom / Conduit (Per Meter) | As Required |
| 4 | — | CG-TERMINAL-KIT | Assorted Terminal Pins & Socket Kit with Rubber Seals | 1 Set |
| 5 | — | CG-CLIP-SET | Frame Mounting Clip and Bracket Set | 1 Set |
| Brand | Part Number |
|---|---|
| COGENG | GY21707 |
| John Deere | GY21707 |
| Interchange | GY21708, GY21709, GY21710, GY21711, MIA12578 |
| Parameter | Specification |
|---|---|
| System Voltage | 12V DC (John Deere standard) |
| Current Capacity | Up to 30A (main power circuits) |
| Wire Gauge Range | 18AWG - 20AWG (signal) / 14AWG - 16AWG (power) |
| Insulation Resistance | ≥100MΩ @ 500V DC |
| Dielectric Strength | 500V AC/60s No Breakdown |
| Voltage Drop | <0.5V @ rated load |
| Temperature Rating | -40°C to +105°C |
| Component | Material Specification |
|---|---|
| Conductor | High-purity tinned copper (99.9%) |
| Wire Insulation | Heat-resistant PVC / Cross-linked polyethylene |
| Connector Housings | OEM-grade Nylon 66 / PBT (UL94 V-0) |
| Terminals | Tin-plated brass |
| Protective Sleeving | Corrugated conduit / PVC tubing |
| Identification | Color-coded wires (John Deere standard) |
| Parameter | Rating |
|---|---|
| Temperature Range | -40°C to +105°C |
| Ingress Protection | IP54 (IP65 on key connectors) |
| Vibration Resistance | 5G @ 50-500Hz |
| UV Resistance | Designed for outdoor use |
| Chemical Resistance | Resists oil, fuel, snow/ice melting chemicals |
| Snow/Moisture Resistance | Sealed connectors for snow collection duty |
| Model | Deck Size | Engine | Application |
|---|---|---|---|
| E120 | 48-inch | 22 HP V-Twin | Main wire harness |
| E130 | 48-inch | 22 HP V-Twin | Main wire harness |
| Attachment | Type | Compatibility |
|---|---|---|
| Snow Blower (Front) | 2-stage snow blower | Compatible with E130/E120 |
| Snow Blade | Front blade | Compatible with E130/E120 |
| Snow Cab | Weather enclosure | Compatible (lighting interface) |
| Electric Chute Control | Chute rotation/deflection | Optional attachment |
Note: The GY21707 harness includes provisions for snow collection attachments including front snow blower electrical interface, chute control, and optional cab lighting. Verify compatibility with your specific snow attachment model before ordering. Contact COGENG with your machine details for exact application verification.
| Circuit Group | Components | Wire Color (Typical) |
|---|---|---|
| Main Power | Battery positive, alternator, starter | Red / Black |
| Ignition System | Ignition switch, starter solenoid, spark | Yellow / Black |
| Safety Interlock | Seat switch, PTO switch, brake switch, reverse switch | Green / White |
| PTO Clutch | Electric PTO clutch engagement | Purple / Blue |
| Lighting | Headlights, tail lights, work light | Brown / Black |
| Snow Collection Interface | Snow blower engagement, chute control | Orange / White |
| Charging System | Stator to regulator/rectifier | White / Yellow |
| Electric Lift (if equipped) | Attachment lift/lower | Red / White |
| Hour Meter | Operating hour counter | Black / White |
| Circuit | Function | Connector Type |
|---|---|---|
| Snow Blower Engagement | Controls front snow blower PTO | 2-pin Weatherpack |
| Chute Rotation Control | Electric chute left/right | 3-pin Deutsch |
| Chute Deflector Control | Electric chute up/down | 2-pin Weatherpack |
| Snow Cab Lighting | Optional cab lighting | 2-pin |
| Attachment Power | Power for snow collection attachments | 2-pin sealed |
| Connector | Location | Pins | Function |
|---|---|---|---|
| Ignition Switch | Dashboard | 5-pin | Key switch interface |
| PTO Switch | Dashboard | 4-pin | Blade/snow blower engagement |
| Seat Switch | Under seat | 2-pin | Operator presence safety |
| Brake Switch | Under floor | 2-pin | Parking brake safety |
| Reverse Switch | Transmission | 2-pin | Reverse safety interlock |
| PTO Clutch | Engine front | 2-pin | Deck/blower engagement |
| Snow Blower Connector | Front of machine | 4-pin | Snow blower interface |
| Chute Control Connector | Dashboard area | 3-pin | Electric chute control |
| Starter Solenoid | Engine side | 2-pin + ring | Engine starting |
| Voltage Regulator | Engine side | 4-pin | Battery charging |
| Headlights | Front grille | 2-pin | Forward lighting |
| Tail Lights | Rear fender | 2-pin | Rear lighting |
The GY21707 wiring harness includes snow collection-ready features
| Feature | Description | Benefit |
|---|---|---|
| Pre-wired snow blower connector | Front-mounted connector for snow blower | Plug-and-play snow attachment |
| Chute control interface | Dashboard-area connector for electric chute | Easy chute control installation |
| Sealed connectors | Weather-resistant for snow/wet conditions | Reliable operation in snow |
| Heavy-gauge power circuit | Additional capacity for snow blower motor | Handles snow blower load |
| LED ready | Compatible with LED work lights | Modern lighting upgrade |
| Feature | Benefit |
|---|---|
| OEM-Grade Materials | John Deere-spec wire, terminals, connectors |
| Exact Fit | Pre-formed to match factory routing |
| Color-Coded Wires | John Deere standard wire colors |
| Weather-resistant connectors | Sealed for outdoor and snow use |
| Snow collection ready | Includes snow blower interface |
| 100% Tested | Every harness individually tested |
| Protective loom | Abrasion protection at key points |
| Test | Standard | Acceptance Criteria |
|---|---|---|
| Continuity Test | 100% | Zero opens |
| Insulation Resistance | 500V DC | ≥100MΩ |
| Dielectric Withstand | 500V AC/60s | No breakdown |
| Voltage Drop | At rated load | <0.5V per circuit |
| Connector Insertion | OEM standard | Within spec |
| Terminal Retention | OEM standard | ≥30N |
Installation decomposition diagram
| Step | Action | Key Component | Specification / Guideline |
|---|---|---|---|
| 1 | Safety First | Entire Electrical System | Park the machine and remove the ignition key. Disconnect the battery negative terminal before any work. |
| 2 | Document Routing | Old Wiring Harness | Take photos of the existing harness routing, clip points, and connector orientations for reference during installation. |
| 3 | Disconnect Old Harness | All Connectors | Unplug all connectors from the old harness, pressing locking tabs carefully to avoid damage. Remove any zip ties or clips. |
| 4 | Remove Old Harness | Entire Old Assembly | Extract the old harness, noting all branch points and frame routing paths. Keep fasteners for reuse if compatible. |
| 5 | Lay In New Harness | COGENG Harness (Item 1) | Route the new CG-GY21707 along the same path as the original. Ensure the protective loom (Item 3) is clear of sharp edges and hot surfaces. |
| 6 | Secure Routing | Mounting Clips (Item 8) | Fix the harness to the frame using the integrated clips or provided brackets. Maintain proper slack at connection points — do not stretch tight. |
| 7 | Connect All Plugs | Main Connector & DIN Plugs | Firmly seat each connector until the locking tab clicks into place. Verify no pins are bent or pushed back. |
| 8 | Final Check & Test | Battery & Electrical System | Reconnect the battery. Start the machine and test all solenoid valve functions to confirm correct, error-free operation. |
Frequently Asked Questions
| FAQ Topic | Question | Answer |
|---|---|---|
| Model Compatibility | What John Deere models does GY21707 fit? | This wiring harness is specifically designed for John Deere models 44, E130, and E120. Always verify your machine's serial number and parts catalog before ordering. |
| Harness Function | What does this wiring harness do? | It provides the critical electrical connection between the machine's control system and the solenoid valves, delivering 24V power and control signals for hydraulic functions. |
| Material Clarification | Is the harness made of iron and rubber? | The original product specification may reference "Iron+Rubber" generically. The harness itself consists of copper conductors, rubber seals/grommets, and plastic connectors. There are no iron components in this harness; the material description likely pertains to connected valve components. |
| Direct Replacement | Is this a true plug-and-play OEM replacement? | Yes. The COGENG CG-GY21707 is manufactured to exact OEM specifications. Connectors are pre-assembled and pinned correctly for a direct, no-modification installation. |
| Installation Difficulty | Can I install this harness myself? | Installation is straightforward for anyone with basic mechanical and electrical knowledge. Simply match the routing path, plug in the connectors until they click, and secure the harness. Always disconnect the battery first. |
| Order & Shipping | What are the ordering and delivery terms? | We accept T/T, Western Union, L/C, MoneyGram, D/A, and D/P. Trial orders are welcome. Each harness is packed in a PP bag inside a carton box and shipped via air, sea, or express (FedEx, UPS, DHL, TNT) from Guangdong, China. |
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