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How to Replace 4 Lamp Instant Start Ballasts

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

4 Lamp Instant Start Ballast Replacement Diagram

After 4 Lamp Ballast is Replaced4 Lamp Parallel Ballast Wiring Diagram

4 Lamp Instant Start Ballast Diagram

Factory Wiring