Welding Checklist
Disconnect the following before welding on completed coaches:
- U270/U280/U295 - B-21 – Alternator ground at alternator
- C-2 – Transmission ground at breakerboard
- Allison ECU – Under dash / driver’s side / both plugs
- ABS - 3 plugs in brake ECU – Power in / Front axle / Rear axle
- HWH -All grounds on coach and engine batteries
- U240 All of the above except ABS
- U300/U320 C-E18 Same as U270/U280/U295 plus:
- PEEC-ECM at engine – lower square plug w/ allen head screw (2402)
- U300/U320 C-E22 Same as U270/U280/U295 plus:
- CELECT-ECM at engine – top plug w/ 2 screws (38459) and round Deutsch plug (2348)
- Any coach with Aqua Hot option:
- Disconnect A9 red 8 ga and A10 black 8 ga at breakerboard in compartment
- Any coach with Primus option:
- Unplug all connections on boilers
- Disconnect #8 black at control panel inside coach