looking for a part.

[48ford]

I need a vacuum switch that they sold back in the 70s.
It worked with the a/c compresser,when you lost vacuum it cut the power to the compresser freeing up a little power on 4 cyl motors.anyone know where I can get one of these.
J.C. whitney used to sell them.
Can you help?
Thanks Russ&Irene

[model a vette]

I can't help you with the vacuum style switch, but have you thought of using an electric cut out? You should wire it thru a relay. Now that I think about it you probably have a relay that turns on the compressor. Just wire a switch that would cut the wire to the relay. The switch could be a micro switch. Just mount it where the accelerator would hit it at higher revs, kind of like the downshift switch on TH400s

[58 Yeoman]

My 89 dodge minivan would quit blowing air when under a load; it may have a switch.  I'll look at my book tonight and see if they had a switch, or it was a glitch.

[enjenjo]

Well, I looked through my books, and can't come up with a number for you. I know what you mean, I have even used them in the past, but I don't have a good number. Most GM 4 cylinders used them well into the 80's

[58 Yeoman]

Russ, the minivan I had, had a 'wide open throttle cutout relay' mounted on the left fender side shield, according to the repair manual.  I circled it in the lower right corner; the a/c compressor is in the upper right.  It's hard to see here, but if you need the schematic, I could email it to you.

[Crosley.In.AZ]

My 89 dodge minivan would quit blowing air when under a load; it may have a switch.  I'll look at my book tonight and see if they had a switch, or it was a glitch.

   ...... you never know with a Dodge. glitch or a switch

[48ford]

Thanks for the help.
The dodge unit should work for me.
Thanks Russ&Irene