I'm trying to pull the negative cable terminal now, but it's not letting go. What's the secret? The nut is removed, the terminal is loose but I can't get it to let go of the post. Is there a special trick?
I didn't touch the head unit connections. The only thing I disturbed was the black box above the head unit. Not sure what module it is. And only to tip it out of its retaining clips about 45 deg. To see the 3 large connectors on the back side. I tipped it back in and snapped it back in place.Besides the power/ground connection, the other connector for the touchscreen terminates into the radio module.
Stupid question but did you also happen to disconnect any connectors from the radio module? If so, you may want to re-check the radio connectors as well since missing this connection on the radio would give the same symptom as not having the touchscreen connected.
Good luck on getting this issue sorted!