I then use my Flir thermal camera to see where are those 142W power consumed, I found out that the instrument panel is the hottest spot, and the heat penetrate to the front that can be seen by opening the frank(see photo below).
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That heat in the corner is not from the instrument cluster. It's from the relays that are right there under the cover and draw current all the time, creating heat. Pop the cover off and you can see two hot spots.