The LCD fuse should be hot all the time. It keeps the processor memory alive in the cluster. It should only have around 18-22
milliamp draw on it, key off.
One thing...never use a test light to check any of the circuits on the cluster...use a good multimeter. A test light can give false info, as well as damage some sensitive circuitry in the processor. Checking the fuse with a light is ok, but it will not show the exact voltage going thru the fuse. The test light will light up with 8volts, so you'll assume the fuse is good, but the system will not work properly with less than 12 volts.
I have a good article on finding battery drain issues somewhere. I'll see if I can locate, and post it. It may be at the shop....
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Joel Adams
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"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"