u/Gnarlltrugg

I recently pulled an auto dim rearview with temp and compass at the wreckers and put it in my truck that previously had the manual dimmer with onstar but not temp/compass. The compass was pretty much plug and play but the temp says OC which according to other places online means open circuit. I have ambient temp with my DIC so I know I have the sensor and that it works but I’m hoping someone can shed some light on how to get that info up to the mirror. Thanks in advance.