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How to Replace 3 Lamp Rapid Start Ballast with Instant Start

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3 Lamp Rapid Start Ballast Diagram

Factory wiring

3 Lamp Rapid Start Ballast Replaced with Instant Start Diagram

3 Lamp Rapid Start Ballast Replaced with 4 Lamp Instant Start Diagram

1. Connect each of the individual blue wires from the instant start ballast to each pair of the lampholder individual wires (red, blue and blue-white).
2. Connect the ballast common red wire to the yellow pair of lampholder common wires.
3. When replacing with a 4 lamp ballast, cap the fourth individual blue wire with a small wire connector.