To make the required connections to a Setra S515HD bus, follow these steps:
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Locate the fuse box of the Setra, which is situated above the front right wheel.
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Open the fuse box and find fuse 61 (F61).
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Remove the fuse and connect the CB025 extension cable for the fuse relay.
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Connect the CB025 to the fuse relay slots of the ZN151 DS Box.

