Blower relay wiring - Chevelle Tech
Electrical & Wiring Troubleshooting electrical problems.

 
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post #1 of 9 (permalink) Old Apr 30th, 09, 2:55 PM Thread Starter
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Gerard
 
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Blower relay wiring

The wiring of my blowrr motor relay is as following:

black: ground
Purple: power to blower motor and a/c resistor (a/c is deleted but resistor must be kept)
blue: goes towards dash

Orange: this one I dont know. Previously, it went to the horn relay, see pic below:

The wire on most right terminal (orange but sprayed black some how) goes to blower relay. I don't think it's correct if I look at some of the wiring diagrams of the horn relay. So where does ORANGE go to???
(I know the other wires are not correctly connected yet)

Gerard
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El Camino 1970 SS396, TH400, all #matching, Black cherry (now 69 Le Mans Blue)
Resto project FINISHED (start date 10-10-2005, finish 07-2011).
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post #2 of 9 (permalink) Old Apr 30th, 09, 7:29 PM
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Jeremy
 
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Re: Blower relay wiring

On mine the orange wire goes directly to the blower motor which is the resistor bypass. Not sure if AC cars are different.

Jeremy


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post #3 of 9 (permalink) Old May 1st, 09, 3:15 PM Thread Starter
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Gerard
 
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Re: Blower relay wiring

Thanks Jeremy.

Any more experts?

Gerard
The Netherlands

El Camino 1970 SS396, TH400, all #matching, Black cherry (now 69 Le Mans Blue)
Resto project FINISHED (start date 10-10-2005, finish 07-2011).
Wanna take a look at this bottomless pit project??:
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post #4 of 9 (permalink) Old May 1st, 09, 3:50 PM
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Re: Blower relay wiring

The wiring on an A/C equipped car is different. The black ( 10 gauge ) wire attached to the horn relay is the correct color. That wire runs along the wheelwell and then across the firewall to a inline fuse holder near the A/C blower relay. The wire coming out of the fuse holder is orange. The orange wire goes to one of the terminals on the relay. When you turn your blower switch to Hi the blue wire supplies +12vdc to the relay thus energizing it. +12 vdc is then sent through the contacts from the orange wire to the purple wire ( blower motor ). The resistor is not used when the motor is running on Hi. The relay was used because of the large current draw. Do you have the A/C wiring diagram, if not I can e-mail it to you.

Erich
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post #5 of 9 (permalink) Old May 2nd, 09, 8:44 AM Thread Starter
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Re: Blower relay wiring

Quote:
Originally Posted by sbvelleman View Post
The wiring on an A/C equipped car is different. The black ( 10 gauge ) wire attached to the horn relay is the correct color. That wire runs along the wheelwell and then across the firewall to a inline fuse holder near the A/C blower relay. The wire coming out of the fuse holder is orange. The orange wire goes to one of the terminals on the relay. When you turn your blower switch to Hi the blue wire supplies +12vdc to the relay thus energizing it. +12 vdc is then sent through the contacts from the orange wire to the purple wire ( blower motor ). The resistor is not used when the motor is running on Hi. The relay was used because of the large current draw. Do you have the A/C wiring diagram, if not I can e-mail it to you.

Erich
Erich, thanks! So the setup as seen in my pic (black wire to most right terminal on horn relay) is correct? There is no form of fuse in the wire from horn relay to a/c blower relay.

No, I don't have this diagram. WOuld be great if you send it. My mail is [email protected]. Thanks a lot.

Gerard
The Netherlands

El Camino 1970 SS396, TH400, all #matching, Black cherry (now 69 Le Mans Blue)
Resto project FINISHED (start date 10-10-2005, finish 07-2011).
Wanna take a look at this bottomless pit project??:
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post #6 of 9 (permalink) Old May 2nd, 09, 5:32 PM
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Erich
 
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Re: Blower relay wiring

Gerard,
Yes, the black wire on the horn relay is correct. I posted a photo of the fuse holder so you can see what it looks like and it's location. I also sent you an e-mail with two attachments. One is the wiring/ vacuum diagram ( jpeg format ). The second is the vacuum switch operation that I made up ( Microsoft word - .doc format ).
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post #7 of 9 (permalink) Old Feb 14th, 19, 10:18 AM
 
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Hello I'm new to this forum thanks for the add! I'm having problems with my HV AC blower on my 68 some of my wires must have been cut going to blower and out of fuse panel any pictures and help would be very helpful I put a new relay and I know resistor I would like to make sure my wiring is right before I put a new selector switch if needed I'm finding all different types of wiring diagrams online that aren't seeming to be very helpful thank you
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post #8 of 9 (permalink) Old Feb 14th, 19, 11:04 PM
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leo
 
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Re: Blower relay wiring

Jay1962, You should really start your own post instead of adding on to the bottom of this post, that way you can get direct answers to your question. Good luck!!

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post #9 of 9 (permalink) Old Feb 15th, 19, 12:35 AM
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Re: Blower relay wiring

Welcome Jay! Yes, start a new thread, the OP here has a 1970 car and answers for him may not work for you.

Meanwhile, Gerard this may help:
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