Charging issues with new cluster.

[Awann99]

I recently swapped my idiot light cluster for a 7 hole tac cluster on my 1969 gmc. ( the tac is busted so it’s not hooked up and there for show at the moment). I repinned the connector according to a post on here. But I did not add the two black wires for the #1 and #12 pin. I added a electric sender for the temp gauge. But it won’t read. It only comes in when I start the truck. It pins itself and then goes back to its lowest setting. Now the battery will not charge. I had the alternator tested and it is fine. But when I remove the battery cable the truck dies. I’ve checked the wiring and everything looks fine. Do the two black wires for the amp gauge need to be hooked up to charge the battery?
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