Glad I found this topic. I recently ordered an ETS Pro for my R32 and after finishing up the wiring last night I was puzzled as to why I had an error light and no gauge movement. I desperately need that light gone and jumping gauge to feel all warm and fuzzy inside. Just ordered an 8ohm resistor off Amazon to throw between the original solenoid leads. I also love how by just pulling and reseating the ATTESA connectors my car jumps between a code 18 or a code 21. Gotta love these old machines.