I have an 87 Camaro that started life with air conditioning. I wanted to take all that stuff out of the engine bay to clean it up so the rebuild calls for an Air conditioning delete box. I have the correct fan and the correct heater box now and I have the plug off of the old box for the fan controls but the connector on the wire harness of the car is for an Air Conditioned set up. Here are a couple of pictures. I need to put the wires shown on the correct terminals of the connector shown for the fan controls. Can you help me with which wire goes where to do this conversion. I am guessing that the purple wire which comes from the relay will not go to the fan control at all. I am thinking it will go directly to the blower motor. If that is correct where do the others go??
If your using the stock hardware, then follow the diagram as laid out..You'll be fine.
If your using something else, you need to identify wire function, and cross~reference.
If you wish, you can build a"secondary harness" per the diagram, and bench test it before installing it in the vehicle...Then all you should require is fused power and ground.
My problem is that I am using the heater sport coupe set up with the three terminal blower resistor, matching fan and heater box.
But the wireharness in the car has the 4 terminal blower resistor connector and the 4 position switch inside the car. That means I will have one extra wire. The tan wire that comes from the blower switch inside the car will have no place to be hooked up on the resistor pack (only three terminals,)
Should I just leave it off or should I hook it up to the same terminal as the blue wire???
If I did that would it just mean that the medium 1 and medium 2 setting on the switch would run the blower fan at the same speed or could this cause some other kind of problem?
Are you trying to do a restoration and have it 100% authentic or just make it work?
The reason the AC model has a different setup is because the 4th position closes a relay that runs full power to the blower motor. The non AC cars did not blow as hard and did not need the high current setting and motor. They do this since the small switch will not take that much current.
So if you are not using the AC motor you can wire it up so th 4th position on your switch is not used or so the 3rd and 4th are wired together and both provide the high position.
Let me know what your intent is for the car. Original or not. And I can tell you what to cross over and where.
This baby is a hotrod. The reason for getting rid of the Air Conditioning was because you don't need that to go fast and it makes the engine bay look really messy. All I want the heater to do is defog the windows so you can see when your going fast (at the track).
don't have it I could get one but it would not fit in the AC delete housing without some cutting. The AC delete housing has 4 coats pure gold base 6 sunset red midcoats and 4 coats of clear coat on it. Don't really want to cut it.
If you look close you can see the heater box in the top left hand corner of the pic
Ric
I don't have the other one I could get one but three speeds is just fine with me. Remember the heater is just so I can defog the windows on those muggy nights coming back from the drag strip or Mosport.
From the original 4 position switch you have 5 wires attached. 1 is a power feed and the other 4 are wires going to the blower resistor network.
From the existing switch:
Yellow (slow speed) goes to the C connector on the resistor.
Tan (medium speed) goes to the A connector on the resistor.
Take the blue and brown from the switch and wire them together and connect to the B connector on the resistor. This should also go to the motor.
Make sure you remove the old blower relay as you wont be using it and also make sure you are using the heater only version of the blower motor and not the higher current A/C motor.
Something else. DONT ever run the blower motor with that resistor outside the plenum. Some people make the mistake of trying to remote that piece. It needs to be inside with air blowing across it.
The above setup will give you 3 speeds. The 3rd and 4th position will be high.
What would happen if I hooked the yellow wire to the C terminal
Tan and blue together to the A terminal
and then ran the brown wire to the high speed fan relay then connected the purple wire from the relay to the B terminal and the B terminal to the post on the fan itself.
I am thinking I would get low speed from the yellow Tan and Blue would both be medium speed and the brown/purple from the relay would be really high speed.
would this full 12 volts to the smaller standard heater fan be detrimental or would it just blow alot of air.
The only difference is you would end up with two middle speeds at the second and third position. High would still be the same.
The relay does not make the motor run any faster with high current. It JUST provides more current for a higher amp motor (the AC one). Since you are running the heater only motor, the result is the same.
I will do it the way you suggested that way I can get rid of the relay. Getting rid of the relay means a whole lot less wires and will tidy up the engine bay appearance substantially.
Thanks Rich
Ric
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