Help - Blower Motor Wiring

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marianamaya

marianamaya

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I just replaced my underdash harness. The old one was "customized" and I had a short somewhere that melted the ignition wire. New harness and ignition swich are in and the car fires right up.

Two issues:

1. The old ignition switch had an orange wire that ran to to gear selector light on the column. The new one has a black wire in that location on the connector. Do I just splice the original orange wire into that black wire to get power to the light, or am I missing something?

2. My Blower motor will not work with the new harness. I think it is a ground issue. The old harness had a spliced ground that ran from the brown wire that is attached to the bracket between the heater core tubes and was screwed to the dash.

What should the connections be? The harness plugs into the resistor that
controls low & high setting - ok. There is a black wire that is coming from the front of the motor. What should that be attached to? Also that brown wire between the heaer core tubes, Where should that be?

Any help would be greatly appreciated.

Pete
 
Pete, what are you working on? Did the new harness come from the same year model?
C
 
Yes, what..............and A/C or heater only?

Orange in Mopars is almost universally the dash dimmer controlled instrument lamps. I don't know of anything that "converts" to another color.
 
The wiring in some of the aftermarket switches is wrong, at least through the 73 model. The added black coming from the switch shouldn't be there at all. The original switch had 4 wires and a unused contact. Somehow the aftermarket decided to place another hot in run wire there.
Orange can go to orange outside the connector if that's easier than wrestling those connector terminals. Either way it doesn't go to black.
 
marianamaya said:
RedFish,

Can I just cut and splice the orange wire into the black wire from the connector?

Pete
Click to expand...
NO.
The factory put the orange wire in the cars connector but.. it comes directly from a column shifter lamp fixture ( out of left field more or less ) to join in with the wires coming from the switch in its connector. The new switch wont let you do the same unless you remove their extra black wire and tape it away somewhere. Orange goes to orange. If you don't have a column shift indicater lamp you don't have the orange wire coming from it. You still need to interrupt the factories orange wire from making with that extra black wire.
Explaining this isn't my specialty for sure. Bottom line, orange and black do not go together.
 
Can anyone help with my Blower Motor Wiring Issue? I just need to know what the Black Wire that comes from the firewall side of the motor connects to and what the brown wire that is is screwed to the bracket between the heater core tubes connects to also. My concern is that a previous owner might have rigged something that I do not understand.

Thanks again,

Pete
 
Free manual from AbodyJoe. This one follows proper Mopar "dash" page numbering

[ame]http://www.abodyjoe.com/pictures/Misc.%20car%20info/70%20Dart%20Challenger%20Serv%20Man1.pdf[/ame]

Free 70 shop manual: You do have to play with page numbers with this one

http://www.mymopar.com/index.php?pid=31

The link

http://www.mymopar.com/downloads/servicemanuals/1970_Plymouth_Service_Manual.zip

Diagrams. These are not factory, and often not exact, but still usable

http://www.mymopar.com/downloads/1970/70DartA.JPG

http://www.mymopar.com/downloads/1970/70DartB.JPG

In the first manual I posted from AbodyJoe (top link), page 8-85 is the index, the diagram you want is page 8-98, 8-99. Find the blower switch near top left. The blower motor comes off the left end of the resistor below.

The lay of the wiring is pictorally shown on page 24-1. This shows the blower power wire coming up over the heater box and connected to the resistor, and the ground wire which on mine ran over to a screw behind the kick panel.

I believe the pictoral on page 8-107 of the Dart cowling shows that ground wire, lower right near floor. Not very detailed
 
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