Hello all, work for a small fleet, got a 2020 kw t880 in the shop with an intermittent abs code. code is a 30-23. "Modulator commons shorted ground (spn 802 fmi 4 blink code 12-7). I tore the abs module out of the dash to inspect connectors terminals and wiring, all was ok. I disconnected one by one each modulator valve, my truck has 6, couldnt pinpoint one specific one. followed the trouble shooting tree in bendix acom program. Is it possible i have a bad module? code will become active and inactive randomly just sitting here over a couple hours. Thanks!