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How To Replace 4 Lamp Parallel Ballast

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Replacing a ballast of the same type (4 lamp with 4 lamp, parallel with parallel) is fairly simple. The wiring connections and colors match up.

4 Lamp Parallel Ballast

Factory Wiring

Replace 4 Lamp Parallel Ballast Wiring Diagram

After 4 Lamp Ballast is Replaced

After 4 Lamp Ballast is Replaced