Need a little help...wiring issue

Hey guys I just installed a after market temperature Guage hooked up to fuse box just like the rest of my Gages .I hooked ground to chassis and temp Guage to sending unit.but Guage stays on all the time....even without key on...no of the other gages do that. ..did I miss something. .does it need a fuse?

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What does the instruction say , a as for wiring ?

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I have all the other guages connected to the same spot.the the power wires run to a single bolt on my fuse box.the rest only turn on with key..but the temp Guage always stays on even without key.any help is appreciated

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