TechSmurf

My 99 TA appears to have a partial short between the fuel pump 12V circuit and sensors, as loosely diagnosed by multiple sensors on different circuits registering significantly changed values while the fuel pump is running (CTS, IAT, Fuel Level, possibly more) and is tossing codes P463, P1635, and P1639, plus two new ones I don't have memorized for low conditions on TPS and Knock 1. The condition seems to be worsening, and it only started throwing codes a couple weeks ago. Are there any common causes for this kind of issue?

Thanks in advance!