Motorola RE13654 7RHT1JD02 Controller

Motorola RE13654 7RHT1JD02 is a digital tachometer/gauge controller used in John Deere tractors (e.g., 4850, 8450 models). Common failure modes for this class include loss of power to the display board, burnt‑out driver ICs on the I/O interface, and corrupted firmware causing the gauge to freeze or show incorrect speed. First‑check diagnostics: verify 12 V/24 V input rails with a multimeter, inspect all connector pins for corrosion or broken contacts, and review any stored error codes via the onboard diagnostic port before proceeding to board replacement or reflash.[oss-gpt-20b] Post Comment

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