also it's jumpered so the fan doesn't run.
identify this
Melting Slicks
Joined: Dec 2008
Posts: 2,772
Likes: 64
From: Mystic CT
High and low side switch for the ac.. The low side sender if right next to the heater box on the bottom of the aluminum tube. Take the jusmper out and hook the switches back up. If no AC try a new switch on the low side and if that does not fix it get it rechagred. Do not run with the jumper in the low side it is there to save the compressor if you are low on ac charge.. Mine was jumpered as wel when I got my 91 last November..
Dave
Dave
Melting Slicks
Joined: Dec 2008
Posts: 2,772
Likes: 64
From: Mystic CT
Bought mine at NAPA around 15 or 20 bucks.. Low side compreesor switch or high pressure switch depending on which one you think is broken. You can change it without losing any gas there is a schrader valve under the switch.
Thread Starter
Instructor
Joined: Jul 2009
Posts: 223
Likes: 0
From: Timisoara, Romania
yes 
and I think own the only 1991 corvette that is registered in romania and the chevrolet service shops here dont even know how to repair it, so I do it myself, it cost me a lot of money and time getting all the parts from us 
and becouse I'm not a mechanic, but have technical skils, I try to get the car in a good working condition with the help of this community
and I think own the only 1991 corvette that is registered in romania and the chevrolet service shops here dont even know how to repair it, so I do it myself, it cost me a lot of money and time getting all the parts from us and becouse I'm not a mechanic, but have technical skils, I try to get the car in a good working condition with the help of this community
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Safety Car
Joined: Oct 2008
Posts: 4,689
Likes: 4
From: Yucaipa CA
yes and I think own the only 1991 corvette that is registered in romania and the chevrolet service shops here dont even know how to repair it, so I do it myself, it cost me a lot of money and time getting all the parts from us and becouse I'm not a mechanic, but have technical skils, I try to get the car in a good working condition with the help of this community
and I think own the only 1991 corvette that is registered in romania and the chevrolet service shops here dont even know how to repair it, so I do it myself, it cost me a lot of money and time getting all the parts from us and becouse I'm not a mechanic, but have technical skils, I try to get the car in a good working condition with the help of this community 
... But hey welcome to the forums. They helped me a lot too since I didn't know a thing about a vette that I am restoring.
Safety Car
Joined: Oct 2008
Posts: 4,689
Likes: 4
From: Yucaipa CA
OK .. here is where those two connectors go. these pictures are from a 1990 vettes a/c system.
this line is from the bottom line out of the evaporator core.
this is the top line from the evaporator core.
this line is from the bottom line out of the evaporator core.
this is the top line from the evaporator core.