[thingstodo]

It stopped raining so I went out and checked SalvageS10 with a 12V battery. The power and ground show up as 21 (B4) and 24 (B7).

Of course, B7 showed up without the battery at all (0.3 ohms resistance to ground) so I could have saved myself the effort of taking out the 12V battery ... but it verified.

So the connector in the link is the view as you face the back of the digital instrument cluster, at the male pins.

The pin references of B4 and B7 refer to the silk screened letters beside the male connector, on the instrument cluster circuit board. A1 is on the left of the top row and is pin 1 on the connector and in the chart. A1 - A17 are pins 1 - 17 in the chart. B1 is on the left on the bottom row and is pin 18 on the connector, so B1 - B17 are pins 18 - 34. B4 is the 4rth pin from the left and B7 is the 7th pin from the left.

Since there is still power on these pins in the truck dash, the failure was originally in the digital cluster and has nothing to do with my clumsy removal of the cluster, or experimentally putting 12.5V on the wrong pins.