Temp gauge not working after instr cluster removal

Hi all,

After removing the instrument cluster to get at the gauge faces, the temp gauge doesnt work right. I reinstalled the cluster and reset the gauges... but the temp gauge shoots up way to the top as soon as i turn the key (even before starting the engine). It does this with the engins cool or hot. There are only 3 wiring harnesses that are connected to the rear of the cluster...and all are connected fine.
any ideas what i may have missed?

2004 prerunner 146k mi
2.7L 4 Cyl

 

what did you do that required "getting at the gauge faces" ?

 

i wanted to remove them so that i could scan them. to have digital images for editing.

 

interesting. you may have messed with the needle but I don't know enough about the electronic clusters