1971 A/C electrical issues
Thread Starter
Intermediate
Joined: Mar 2007
Posts: 45
Likes: 2
1971 A/C electrical issues
Hi all,
I'm hoping you can help me get power to the a/c compressor on my 1971 corvette that had a crate engine installed 15 years ago. According to the Mid-America Assembly Instruction manual (page L337, UPC C60, Sheet E6), the 16 gauge dark green wire on the compressor connects to a 16 gauge light blue wire at a thermal switch . On my car, that connection looks like a simple pigtail not connected to anything else. Should it be plugged in somewhere?
It appears that the 16 gauge light blue wire goes from the thermal switch to a blocking relay which connects to the anti-dieseling relay which in turn is connected to an 18 gauge orange wire connected to the blower motor relay. Anybody know where the blocking relay and anti-dieseling relay are?
Most puzzling of all is that on that diagram (page L337, UPC C60 Sheet E6) as I said, it shows an 18 gauge orange wire tying into the High Blower motor relay (along with a 12 gauge orange wire, a 12 gauge purple wire & an 18 gauge dark blue wire).
Every photo I find of that relay (and the relay currently in my car) only has four prongs: one for the 12 OR wire, one for the 12 PPL wire, and one for the 18 DBL wire (all in one pigtail connector) and one for two 14 B wires (in a separate pigtail).
I'm wondering how the 18 gauge orange wire is supposed to connect? Any help would be much appreciated.
Sophocles
I'm hoping you can help me get power to the a/c compressor on my 1971 corvette that had a crate engine installed 15 years ago. According to the Mid-America Assembly Instruction manual (page L337, UPC C60, Sheet E6), the 16 gauge dark green wire on the compressor connects to a 16 gauge light blue wire at a thermal switch . On my car, that connection looks like a simple pigtail not connected to anything else. Should it be plugged in somewhere?
It appears that the 16 gauge light blue wire goes from the thermal switch to a blocking relay which connects to the anti-dieseling relay which in turn is connected to an 18 gauge orange wire connected to the blower motor relay. Anybody know where the blocking relay and anti-dieseling relay are?
Most puzzling of all is that on that diagram (page L337, UPC C60 Sheet E6) as I said, it shows an 18 gauge orange wire tying into the High Blower motor relay (along with a 12 gauge orange wire, a 12 gauge purple wire & an 18 gauge dark blue wire).
Every photo I find of that relay (and the relay currently in my car) only has four prongs: one for the 12 OR wire, one for the 12 PPL wire, and one for the 18 DBL wire (all in one pigtail connector) and one for two 14 B wires (in a separate pigtail).
I'm wondering how the 18 gauge orange wire is supposed to connect? Any help would be much appreciated.
Sophocles
Safety Car
Joined: Oct 2007
Posts: 4,380
Likes: 1,744
From: Seattle Area Washington
Hi all,
I'm hoping you can help me get power to the a/c compressor on my 1971 corvette that had a crate engine installed 15 years ago. According to the Mid-America Assembly Instruction manual (page L337, UPC C60, Sheet E6), the 16 gauge dark green wire on the compressor connects to a 16 gauge light blue wire at a thermal switch . On my car, that connection looks like a simple pigtail not connected to anything else. Should it be plugged in somewhere?
It appears that the 16 gauge light blue wire goes from the thermal switch to a blocking relay which connects to the anti-dieseling relay which in turn is connected to an 18 gauge orange wire connected to the blower motor relay. Anybody know where the blocking relay and anti-dieseling relay are?
Most puzzling of all is that on that diagram (page L337, UPC C60 Sheet E6) as I said, it shows an 18 gauge orange wire tying into the High Blower motor relay (along with a 12 gauge orange wire, a 12 gauge purple wire & an 18 gauge dark blue wire).
Every photo I find of that relay (and the relay currently in my car) only has four prongs: one for the 12 OR wire, one for the 12 PPL wire, and one for the 18 DBL wire (all in one pigtail connector) and one for two 14 B wires (in a separate pigtail).
I'm wondering how the 18 gauge orange wire is supposed to connect? Any help would be much appreciated.
Sophocles
I'm hoping you can help me get power to the a/c compressor on my 1971 corvette that had a crate engine installed 15 years ago. According to the Mid-America Assembly Instruction manual (page L337, UPC C60, Sheet E6), the 16 gauge dark green wire on the compressor connects to a 16 gauge light blue wire at a thermal switch . On my car, that connection looks like a simple pigtail not connected to anything else. Should it be plugged in somewhere?
It appears that the 16 gauge light blue wire goes from the thermal switch to a blocking relay which connects to the anti-dieseling relay which in turn is connected to an 18 gauge orange wire connected to the blower motor relay. Anybody know where the blocking relay and anti-dieseling relay are?
Most puzzling of all is that on that diagram (page L337, UPC C60 Sheet E6) as I said, it shows an 18 gauge orange wire tying into the High Blower motor relay (along with a 12 gauge orange wire, a 12 gauge purple wire & an 18 gauge dark blue wire).
Every photo I find of that relay (and the relay currently in my car) only has four prongs: one for the 12 OR wire, one for the 12 PPL wire, and one for the 18 DBL wire (all in one pigtail connector) and one for two 14 B wires (in a separate pigtail).
I'm wondering how the 18 gauge orange wire is supposed to connect? Any help would be much appreciated.
Sophocles
