OK. I recently replaced the CAS and PTU. Just relocated the PTU to under the nose section. Battery is the same as when I got it and the ground is slightly corroded but I'll take pics. I did drive the car around earlier before I changed the IAA assembly without issue. It only got bad after changing the IAA and warming it up in the driveway to test the install. I'm thinking that tomorrow I'll be swapping the other IAA back.