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
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
2027 Corvette vs The World: Every C8 vs Its Closest Competitor
Joe Kucinski
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.