01-20-2017, 12:59 PM
On my '93 the vacuum was produced by a venturi device rather than a pump. So with the engine running up front under the coach you should hear a hissing sound from it.
Forest & Cindy Olivier
1987 log cabin
2011 Roadtrek C210P
PO 1999 Foretravel 36'
1998 Newell 45' #486
1993 Newell 39' #337