Please help identify this cut hose

[Mark A Goins]

Hello, I inhereted a 1973 Chevy c20 from a great uncle and I wasnt very close to him so I dont know why he left me this truck or know very much about it to be honest. Anyways it seemed like a fairly decent trucks for being nearly 50 years old.

There is a hose that is been cut and I suspect it is a hose for air conditioning that may have been installed at one time or another, currently there is no compressor in the engine bay but there is a bracket for where it should be. Can anybody help identify the hose I have circled in the picture and tell me what I need to do to get it fixed up?

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[Charlie]

 

[Mark A Goins]

Thanks for the welcome Charlie

 

[82sbshortbed]

You're correct. An a/C hose that goes to the compressor. Since you don't have one you'll need new hose and compressor. Can probably wait since it's winter time now. Lol

 

[Mark A Goins]

Thanks for the reply, I wasnt real sure if it did go to the missing air conditioning compressor or not because I dont seem to have any heat or any type of defrost/fan action,,,I checked the fuse under the dash and it seems to be all good so I was thinking that cut hose might have something to do with it. Not real sure where or what to check next for my heat issue,,I can definitely live without air conditioning but heat during the winter is a little bit rougher to manage.

 

[chengny]

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[K201979]

Maybe chewed blower wires or a nest in the blower. Especially if its been sittin at all.

 

[chengny]

Thanks for the reply, I wasnt real sure if it did go to the missing air conditioning compressor or not because I dont seem to have any heat or any type of defrost/fan action,,,I checked the fuse under the dash and it seems to be all good so I was thinking that cut hose might have something to do with it. Not real sure where or what to check next for my heat issue,,I can definitely live without air conditioning but heat during the winter is a little bit rougher to manage.

Since you have no knowledge of the truck's history it might be best to work backwards on this one.

First check whether there is any voltage to the blower motor from the blower speed control relay. Check for voltage with the control switch in every position.

Next check would be for continuity to ground from the blower motor. Make sure the terminals at both ends are tight and they are clean and bright (also applies to the surfaces they mount to).

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If there is power supplied and the ground connection is good, try to mechanically rotate the blower motor. It's up to you how to do this but the easiest way would probably be to release the motor to casing screws (after disconnecting the power supply and ground leads). Withdraw the blower squirrel cage and confirm that it is free to rotate.

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Your bolting may differ from the image above, but I'm sure you'll figure it out.

If you find there is no power to the motor windings, come back and someone will step you through the diagnostic procedure for the control circuit.

Do you have a multimeter and know how to measure for continuity and low DC voltage?

You will be checking the resistor stack and the relay. Before wasting time on anything else, locate them and just be sure that their connections are good.

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