Don't mean to look stupid, but I cannot find the low pressure switch on my AC system. Any ideas? My car is a 99 convertible. Thanks again. Maybe someday I will have a computer with the capacity to load files....Be cool....Mike

 

It is on the line at the bottom of the radiator, just about at the middle.

 

They sure make things easy for you, don't they......Thanks again....Mike

 

Use this link and look on page 4

Link http://www.jagrepair.com/images/Auto...s/ACSystem.pdf

 

Ended up being just some corrosion on the plug. I cleaned it off, put some dielectric grease in the plug, added a can and a half of 134 and the AC pressures were dead nuts on. The more I use things, the more the car is coming back to life.

The chain tensioners and cam cover gaskets came today, so it looks like Wednesday is the day for that. I think I will put it on the lift, so I am not bending over for 2 hours.....Thank you again......Mike

 

Ignore this...figured out my question was irrelevant.

 

On the road again!

 

Think I have almost a total freon leak...found a smattering of green-ish oil (looked like compressor oil) just below the drier...think it actually is power steering fluid, and I couldn't see well enough...looked like a freon line with a quick disconnect fitting...doh! So, I'm headed to grab some freon and leak dye to figure out where the problem is...already replaced the pressure switch thinking it is 15 years old anyway. Thanks for reading and being ready to help (although apparently the help I need is mental!

 

late but not too late, did yiu have to depressurize the system to install the AC sensor below the radiator

 

did you have to depressurize the system to replace the AC sensor you describe at the middle base of the radiator?

 

Unfortunately (but fortunately for me), my system had no freon in it at all once I put the manifold guages on it, so I never had to worry about that. I've put new pressure switches on a 2008 Prius, and a 2010 Mustang, neither of which required me to evacuate the freon. If memory serves, the pressure switch screws into its housing and then depresses a valve (which is closed when the switch is removed) on the way to being screwed in.

 

I have a 1998 XK8 and didn't have to evacuate the system to replace the a/c pressure switch because there is a schrader (sp?) valve in the fitting the switch screws into. May be different on newer models.