Rain Bird ESP-1: Only Zone 6 Works — Check Common Wire

If zones 1–5 don't work but zone 6 does, and it worked before — the common wire is likely cut or disconnected. All valves share common; one break kills multiple zones.

Why Not All Valves Failed?

Simultaneous solenoid failure on 5 valves is near impossible. Common wire fault explains it perfectly.

Fix

1. Inspect common wire splices in valve boxes.
2. Look for corrosion, loose wire nuts, cuts.
3. Repair with waterproof connectors.