Wiring diagram of instrument cluster

[dmjlambert]

I am reading an old post from 2012 here
http://67-72chevytrucks.com/vboard/s...42#post5718242

Question 1: I have an instrument cluster with same printed circuit, and I wonder if anybody has a higher resolution image of the printed circuit diagram to share? I am having difficulty reading the small text on the one in the post, and trying to figure out how the wiring goes.

Question 2: I don't understand pin 5 of the cluster connector and the temperature light. I have a light bulb and light bulb holder in the temperature light position, but do I understand correctly that light will never glow at all? Just like in the dash cluster plug diagram in the post mentioned, there is no wire in position 5. Is there a different temperature sender I could put on the engine to make it activate the light (instead of or in addition to the guage sender?)