how to find a parasitic draw?

Hello, no, it's not the PCM. Parasitic draw is found when putting an amp probe on the battery cable to detect draw with the key off and removed from the vehicle. If you're seeing a significant draw, the next step is to remove fuses from the under hood fuse box first one by one until the draw disappears. Once it disappears, you know which circuit you have to investigate. Then, a wiring diagram helps determine possible related and affected components and wiring areas. Key take away: Don't guess! ] Use this link to find some shops near you that can help with your concern: www.repairpal.com/repair-shops