I need help with heater wiring please

[beck]

I'm working on my 62 Chevy 1/2 ton. The truck has a standard heater. I have changed the dash control to the deluxe model which I took from a 2 ton. I will not be using the air knob on the control.

I think the blower speed control switch is the same for the standard and deluxe. Right?

The deluxe heater has a resistor mounted in the back side of the air box. The wires going to this resistor are yellow, orange, and blue. There is only an orange wire going to the blower motor, where it plugs into the motor.

My standard heater air box has a hole in the same place as the deluxe heater does. I do not have what ever was in the hole. The resistor in the deluxe heater does not fit into this hole. The resistor bolts into the the deluxe heater. What ever went into the hole on the standard heater was just held in by sheet metal clips on the air box.

My standard blower motor has 4 wires coming out, black, orange, yellow, and green. The deluxe motor just has a plug that the orange wire plugs into. I do have the factory wiring from the deluxe heater. The deluxe blower motor appears to be larger than the standard motor.

My standard blower motor as I recieved it had the yellow and orange wires together with a wire nut. The green wire had a round lug on it so I suspect it was a ground wire. The black wire had a plug in spade terminal on it so I assume it was the power wire. As this was wired it may have just worked on one speed.

I don't konw how it should be wired.. Does anyone have a wiring diagram or know the correct way.

 

[dvalentine]

I just checked some diagrams that are used in the Factory Service Manuals AND no heater diagrams to be found.

As these were TRUCKS,,, heaters were considered an "accessory", so the wiring diagrams are located in the "Factory Accessory" installation Manual.

http://www.64moneypit.pages.qpg.com/id12.html

Some Sevice Manual diagrams for 63-66 above..

Val

 

[beck]

I figured it out

The solution to my problem was pretty easy. At first I was going to try to install the deluxe blower motor and the resistor. I decided to try to just use the resistor first. I removed the air tube that it is mounted in. The standard heater had clips that held the resistor in. They were easily removed. I drilled to holes like the deluxe heater had and mounted the resistor. I played with my blower motor and found it was just a single speed motor. The yellow and orange wires I talked about above had to be connected for the motor to run. This may have been a generic replacement motor from years ago. I hooked it all up to the deluxe wiring loom and it works, with all 3 speeds. I made a mistake on the above wire color descriptions. On the wiring coming from my original standard motor the green wire had a spade connection so I connected it to the orange power wire coming from the resistors. The black wire had a round hole lug so I used it for the ground wire. Black is the typical color for ground wiring on vehicles. I did test the motor with + - on both the green and black. The motor ran the same direction and speed with either polarity. That suprised me. I thought it would run backward one way. Anyway it works!

 

[TimE]

Good job and glad to hear you got it worked out.