03-24-2014, 05:04 PM
there are a couple of remote possiblities.
1. the vacuum supply for the dash controls on that vintage should be an air powered pump. on my 90 it went out and i replaced it with a 12v pump out of a ford diesel truck. that should only be cycling on if the ignition key is on and there is a vacuum leak.
2. there is a merge relay in front of the passenger in the kick panel. or there was on my 90. that is besides the one in the rear. anyway, it might be a relay in that kickpanel cutting in and out from intermittant power or a bad coil.
3. there might be a self resetting dc fuse/breaker in there tripping and resetting.
just some say out there ideas
tom
1. the vacuum supply for the dash controls on that vintage should be an air powered pump. on my 90 it went out and i replaced it with a 12v pump out of a ford diesel truck. that should only be cycling on if the ignition key is on and there is a vacuum leak.
2. there is a merge relay in front of the passenger in the kick panel. or there was on my 90. that is besides the one in the rear. anyway, it might be a relay in that kickpanel cutting in and out from intermittant power or a bad coil.
3. there might be a self resetting dc fuse/breaker in there tripping and resetting.
just some say out there ideas
tom
2014 Haulmark 40' Super C on Freightliner Cascadia ISX15 Easton 13 speed
Former Owner 1990 38' Newell Coach 236 8V92
Former Owner 1999 45'8" Newell Coach 526 Series 60
Former Owner 2002 45'8" Newell Coach 608 Series 60