heater switch/motor hookup

gd71eb

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Apr 23, 2010

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156

• Aug 6, 2012

• #1

needin a little asistace from you more inteligent folks.....heres the scenerio

rebuilt the heater box and put a new cage and motor in - motor has a single wire hookup. then there are the two wire prongs that sit at the back top of the heater box.

heater switch has 3 prongs on it..... and i cant figure it out of of shop schematics

hot wire to switch goes where? this leaves 2 prongs on switch to 3 areas at heater
any help is much appreciated

 

Viperwolf1

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• Aug 7, 2012

• #2

I don't remember off hand what the terminal configuration is at the switch. Maybe one on top and one at each side? Brown wire at top and red and orange wires at sides. If hi/lo is backwards swap red and orange wires.

Red wire goes to one side of resistor coil (spring looking thingy). Both orange wires go to the other side. Other loose orange wire goes to heater motor wire. Motor needs a ground wire from mounting screw to metal cover on back of heater box.

 

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OP

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gd71eb

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• Aug 7, 2012

• #3

Ill give that a whirl in the morning, thanks for the help!!!

 

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gd71eb

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• Aug 7, 2012

• #4

um....

you said "both orange wires" where does the second orange wire come from? all my wiring is "non stock".
is it just 2 wires comming off 1 terminal to other side of resistor and then from there 1 wire to motor?

thanks

 

Viperwolf1

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• Aug 7, 2012

• #5

gd71eb said:

you said "both orange wires" where does the second orange wire come from? all my wiring is "non stock".
is it just 2 wires comming off 1 terminal to other side of resistor and then from there 1 wire to motor?

thanks

Click to expand...

Yes, that's it.

 

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gd71eb

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• Aug 7, 2012

• #6

Cool

U the man, Thanks!

curious though why run 2 wires from terminal to terminal then 1 off to a seperate spot??? weird but im all over it;D

 

Viperwolf1

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• Aug 7, 2012

• #7

gd71eb said:

U the man, Thanks!

curious though why run 2 wires from terminal to terminal then 1 off to a seperate spot??? weird but im all over it;D

Click to expand...

Because that spring thingy is a resistor and it gives you a low speed on the fan. Low speed wire sends current through it. High speed wire sends current around it.

 

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gd71eb

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• Aug 7, 2012

• #8

well there ya have it....
Great help

 

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gd71eb

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• Aug 7, 2012

• #9

Lmao

so viper..... talk about user error! kinda hard to ground out the box when the box is mounted only to the fiberglass firewall%)?:? DOH!!!

 

Viperwolf1

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• Aug 7, 2012

• #10

gd71eb said:

so viper..... talk about user error! kinda hard to ground out the box when the box is mounted only to the fiberglass firewall%)?:? DOH!!!

Click to expand...

That would be a problem. You should add a signature that says "fiberglass body" for when you ask electrical questions.

The ground needs to be at least as heavy as the power wires. Heavier if you have to run it very far.