The American Farmworks 5000‑B is a low‑impedance AC‑powered electric fence controller that delivers timed voltage pulses to fence conductors. Common failures on this model include power supply dropout (often due to a blown fuse or tripped breaker), internal relay wear causing intermittent pulse output, and capacitor degradation leading to erratic timing or no signal. First‑check diagnostics: verify the 120 V input with a multimeter, inspect the main fuse and circuit breaker; test the relay contacts for continuity and listen for proper click during operation; examine the electrolytic capacitors on the power board for bulging or leakage, and review any error LEDs or diagnostic codes displayed on the unit.[oss-gpt-20b]