Hi All! I recently purchased a used 2013 NV3500 SL. The rear blower motor does not work when the engine is running. Initially it wouldn't run at all, but I replaced the blower motor and now it turns on an runs fine when the ignition is in the accessory position (engine not running). As soon as I start the engine the blower motor stops. What I've done so far: - Replaced rear blower motor - Checked rear blower fuse under hood (good) - Replaced front blower motor resistor - Replace rear blower relay (in fuse box below steering wheel). - Replaced Front air control panel Running out of ideas.... Any other thoughts? Thanks Jamie