The key on-off process does not work for your jeep since you most likely do not have OBDII. As for the pump you should start by checking the fuse. If it is good, find the relay and swap it with an identical one, that will rule that out. After that you need to see if there is power to the pump. I don't know the wire colors and a diagram would be most helpful to you.
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Journeyman Polyphase Meterman IBEW Local 387
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Siena Jeep Owner's