Date: Mon, 17 Sep 2001 17:50:05 GMT From: "KeithG" <noonenopsaml.com> Subject: Re: GM 900 air con
The switch should be a pressure switch on one of the A/C lines somewhere. I do not know exactly on your car. Generally, there are 2 tabs on the switch. If these are shorted, it will allow the clutch to engage. KeithG "Huw Jones" <hflj1nopsam.ac.uk> wrote in message news:3BA61036.58406B0Cnopsam.ac.uk... > Keith, > > Thanx for the reply, where is the switch? > > Huw > > KeithG wrote: > > > > A/C compressor will not engage until there is adequate pressure in the > > system. This can be overcome by bypassing the low pressure switch. I would > > suggest leaving the fey 'on' and bypassing the low pressure switch to see if > > the A/C clutch engages. You should hear a click. > > > > KeithG > > "Huw Jones" <hflj1nopsam.ac.uk> wrote in message > > news:3BA5DB7E.676968BCnopsam.ac.uk... > > > Hi, > > > I've just come across this group and it seems pretty well informed. > > > > > > I've recently fitted a Saab A/C kit to my 1995 GM 900i. > > > The system has yet to be gassed. > > > The components were pretty easy to install but I cannot get the > > > compressor clutch to operate. > > > I know the clutch works as I connected 12v to it before installation to > > > check it. > > > > > > I know there is a delay before the A/C comp starts to work to allow for > > > engine load is this done by a relay, the engine ECU or a pressure switch > > > in the A/C system? > > > > > > Thanx > > > > > > Huw > > > UK