hi thanks cant find where its located its on a 2008 itasca ellipes 40 td frieghtliner maxum chassis 400 hp cummings i have air but when warning light goes off and buzzer i lose gauges no fuel rpm alternater all but air would realy be thankfui for all amd any help thanks again ps last year problems with generater it was repaired culprit was inverter it was sent out and rebuilt only option