Thread: a/c recirc switch/ how to keep on?
View Single Post
  #15  
Old 10-25-2003, 12:11 AM
D.Blake D.Blake is offline
Registered User
  
Join Date: Sep 2003
Location: Albuquerque, NM & Lakeside, AZ
Posts: 67
I think it would be tricky without knowing the circuitry of the control unit, particularly the output driver for the valve. I imagine it just switches 12v power to engage the switchover valve. But you have to know the "power supply" impedence of the control box. Some sort of diode arangment in the current switchover line then connect your switch between the valve and the diode might work and protect the control box. It would depend on how sensitive the circuitry is in the box. Even a diode will bleed some current in the reverse direction. Sounds like tinkering with an old control box would be in order first. The folks at General Development Labs might know too.
__________________
D. Blake
86 300SDL 340K (for sale)
83 300SD 205K (gone)
06 Chevy K3500 LBZ CCLB 50K
94 Chevy K2500 6.5L TD 250K (gone)
Reply With Quote