AM138537 AM100819 S500-B100 Glow Plug Relay (Pack of 2) - Compatible with John Deere Gator 4X2 4X4, XUV, Compact Tractor 655 755 855 856, F-Series Mowers

Replacement Glow Plug Relay Module for John Deere Equipment This is a direct replacement Glow Plug Relay Module for compatible John Deere diesel-engine utility vehicles, compact tractors, and mowers. It is a critical component for managing the preheating system, which is essential for reliable engine starting.  Product Overview The glow plug relay module controls the electrical current to the engine's glow plugs. These plugs heat the combustion chambers to aid ignition when starting a cold diesel engine. A faulty module can lead to hard starting, prolonged cranking, or failure to start in cool conditions.  Compatibility Details This module is compatible with, but not limited to, the following John Deere equipment (always verify your model):  For John Deere Gator Utility Vehicles: 2020, 2030, 2030A 4X2HPX & 4X4HPX; 4X2, 4X4, 6X4 Diesel, Trail, and Worksite models; Military M-Gator 6X4 A1 & TH 6X4; XUV850D.  For John Deere Compact Tractors: Models 655, 755, 756, 855, 856.  For John Deere Riding Mowers: Models F735, F915, F925, F935.  Key Features & Benefits  Restores Starting Performance: Replaces a faulty unit to help ensure consistent engine starts.  Safety-Focused Design: Includes built-in electrical protection for the glow plug circuit.  Guaranteed Fit: Designed to match the form, fit, and function of the original John Deere part numbers listed.  Maintenance Solution: A single-component replacement that can resolve starting issues related to the preheat system.  Installation Note Installation generally involves locating the original module (often in the engine bay), disconnecting the electrical connector and any mounting hardware, and installing this new unit in its place. Always disconnect the battery's negative terminal before beginning any electrical repair. For specific instructions, refer to your equipment's technical manual.  Package Includes 2 x AM138537 AM100819 S500-B100 Glow Plug Relay Module  Important Compatibility Disclaimer It is the buyer's responsibility to confirm this part is compatible with their specific John Deere equipment model, serial number, and engine type. Cross-reference the old part number and machine model before purchase. This is an aftermarket replacement part engineered to OEM specifications.

• Specific Equipment Compatibility: This glow plug relay module is designed for a range of John Deere equipment, including Gator utility vehicles (4X2, 4X4, 6X4, XUV models), Compact Tractors (655, 755, 756, 855, 856), and Riding Mowers (F735, F915, F925, F935).
• Direct OEM Part Number Replacement: Engineered to directly replace multiple OEM part numbers, including AM138537, AM100819, S500-B100, 203684-0000, and 194437-0000. Please verify your original part number.
• Built-In Circuit Protection: Designed with integrated overload and short-circuit protection functions. This safety feature helps prevent potential damage to the glow plug circuit and related electrical components.
• Simple Direct Replacement: Designed for a straightforward, direct swap with the faulty module. No professional tools or modifications to the wiring harness are typically required, facilitating easier maintenance.
• Durable Construction for Demanding Use: Built to perform in the conditions typical of agricultural and utility equipment, aiming to provide dependable operation for your John Deere machine.