Blower motor resistor wiring diagrams
11-10-14, 12:33 PM
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Blower motor resistor wiring diagrams
Can someone tell me where the wiring diagram for the blower motor resistor is? I've looked in all the FSM's on Mazda RX-7 Reference Materials and can't find a section that deals specifically with the BMR.
I am attempting to rewire the car using a different controller than the FC climate lexicon and cant figure out the wiring for the motor speeds.
(Car is a 91 Vert, if it matters.)
I am attempting to rewire the car using a different controller than the FC climate lexicon and cant figure out the wiring for the motor speeds.
(Car is a 91 Vert, if it matters.)
11-10-14, 02:21 PM
#2
You can get the wiring diagram at foxed.ca, if you download the wiring scheme section, it's on page 50-64.
It's pretty simple, there are 2 relays and a power resistor. With your fan slide all the way to the left none of the relays are activated and nothing works. If it's anywhere but all the way to the left relay one is activated which supplies power to the power resistor, so you can adjust the speed. With the slide all the way to the right relay two is activated which supplies power directly to the motor, making it go vtec fast!
It's pretty simple, there are 2 relays and a power resistor. With your fan slide all the way to the left none of the relays are activated and nothing works. If it's anywhere but all the way to the left relay one is activated which supplies power to the power resistor, so you can adjust the speed. With the slide all the way to the right relay two is activated which supplies power directly to the motor, making it go vtec fast!
11-10-14, 09:29 PM
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That's the next step in this process.
11-10-14, 10:15 PM
#7
Not sure, I'm learning as I go. I've figured out what wires make the doors open and close, but can't figure out how they were able to make the motors stop half way. (All the way open for defrost/ Half for face/ All the way closed for feet.)
That's the next step in this process.
That's the next step in this process.
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11-10-14, 11:26 PM
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Well, here goes:
https://www.dropbox.com/s/tfn557el19...2000.29.28.jpg
The dash plug is 95% done, once complete I'll lay a fiberglass mold to make the final project. (That I wont show pics of till the car is done. I've been quitly lurking on the forum and working on my car from top to bottom, inside and out for 2 years now. I have about 4 or so months till it's 100%.)
https://www.dropbox.com/s/x5qk9otnzz...42.46.jpg?dl=0
The switches that I plan on using are similar to the Ford GT toggle switches. I have the window, locks, power top, power mirrors, lights, wipers and turn signals wired with my secret creation, just need to finish the climate controls.
https://www.dropbox.com/s/tfn557el19...2000.29.28.jpg
The dash plug is 95% done, once complete I'll lay a fiberglass mold to make the final project. (That I wont show pics of till the car is done. I've been quitly lurking on the forum and working on my car from top to bottom, inside and out for 2 years now. I have about 4 or so months till it's 100%.)
https://www.dropbox.com/s/x5qk9otnzz...42.46.jpg?dl=0
The switches that I plan on using are similar to the Ford GT toggle switches. I have the window, locks, power top, power mirrors, lights, wipers and turn signals wired with my secret creation, just need to finish the climate controls.
11-10-14, 11:31 PM
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https://www.dropbox.com/s/rhaucqy4w9...40.50.jpg?dl=0
The new dash sits on a modified FC dash support, so the plenum and duct work are still usable.
The new dash sits on a modified FC dash support, so the plenum and duct work are still usable.
11-11-14, 09:17 AM
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https://www.dropbox.com/s/w1hajy2utw...02856.JPG?dl=0
https://www.dropbox.com/s/g08admntrl...05.17.jpg?dl=0
https://www.dropbox.com/s/ww93cn6th2...05.33.jpg?dl=0
https://www.dropbox.com/s/712uho7fx3...05.26.jpg?dl=0
Clokker, you seem to be a guy that knows a thing or two about wiring, I ended up buying this last night: http://www.ebay.com/itm/Scott-Drake-Heater-Resistor-Assembly-3-speed-without-A-C-Ford-Mercury-Each-/191400844715?pt=Motors_Car_Truck_Parts_Accessories&hash=item2c90611dab&vxp=mtr since it's already 3 speeds (which is what I am trying to achieve (I have a 4 throw switch Off/Low/Med/Hi) and I don't have to worry about the 2 OEM relays for fan speeds.
Question is, do you have an idea as to how they are able to make the "door" motors open and close?
11-11-14, 10:32 AM
#14
This is very cool, I admire the concept and execution.
I do know a little about wiring but my tendency/preference is to simplify rather than duplicate.
It appears you're recreating the logicon but you haven't yet explained why you don't just use the original part.
Were I to approach this mod (which I have a few times) I'd be looking to delete as much electrical as possible and the obvious first choice would be Miata. The fan control is identical to the FC- may be plug-n-play, in fact- but the blend/mode control is all cable actuated. Either remove the stock motors and adapt the cables to work or (my first option) use the Miata HVAC center box.
How do you plan on mounting that resistor module?
The original puts the heatsink in the airflow path to cool it, will this one mount in the same place?
I would appreciate a bit of the underlying logic to this mod.
Is your logicon broken and you just don't want to replace it or don't you like the way it looks or what?
I do know a little about wiring but my tendency/preference is to simplify rather than duplicate.
It appears you're recreating the logicon but you haven't yet explained why you don't just use the original part.
Were I to approach this mod (which I have a few times) I'd be looking to delete as much electrical as possible and the obvious first choice would be Miata. The fan control is identical to the FC- may be plug-n-play, in fact- but the blend/mode control is all cable actuated. Either remove the stock motors and adapt the cables to work or (my first option) use the Miata HVAC center box.
How do you plan on mounting that resistor module?
The original puts the heatsink in the airflow path to cool it, will this one mount in the same place?
I would appreciate a bit of the underlying logic to this mod.
Is your logicon broken and you just don't want to replace it or don't you like the way it looks or what?
11-11-14, 11:40 AM
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Thank you, this has been a very long process, both in labor and in research. It took me 3 months just to figure out which [aesthetically pleasing] toggle switches to run, which warning lights to use (which I had to order from the UK,) which wires and relays to keep, which ones to just start from scratch on, etc...
Solely for aesthetic reasons... The FC is a marvelous car, I've owned 11 so far, and (in my opinion) the most dated thing on these cars is the interior. Just sitting in the car it feels like a car from the 80's, cheap plastics, cheap buttons, orange lights, just no longer appeals to me. I'm trying to make a RX7 that would look like it'd be made to todays current car trends and designs. Hence the Advanced Key, the GPS Speedometer, the leather wrapped dash, the big "holes" in the center console and cluster area will have a carbon fiber insert that the gauges will sit in, re-wrapped leather RX8 seats (which I already own, but might go with something else even cooler.... 
)
I'm trying to update/re-fresh a car that was designed over 25 years ago, as we all are on the forum, but I'm taking it to the extreme.
I thought about that, but because I'm trying to build a 2015 (by the time it's done) RX7 I really would rather keep it all electric, instead of having cables.
Two things I know very well: welding/metal fabrication and composites! Fiberglass, carbon fiber, Teflon, someway somehow I'll make it work. But the time I'm done with it it will look as if it was designed to go wherever I end up placing it... Untill I have it in my hand it's hard to say.
)I'm trying to update/re-fresh a car that was designed over 25 years ago, as we all are on the forum, but I'm taking it to the extreme.
Two things I know very well: welding/metal fabrication and composites! Fiberglass, carbon fiber, Teflon, someway somehow I'll make it work. But the time I'm done with it it will look as if it was designed to go wherever I end up placing it... Untill I have it in my hand it's hard to say.
11-11-14, 12:40 PM
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neat project!
you know the FC logicon is just a circuit board and some switches mounted on the same enclosure.
you could very easily mount the "brains" somewhere and just use switches of your choice, where ever you want, the FD and Rx8 are like this. the Rx8 has a little box where the circuit opening relay is in the FC, and that's the brains. the thing with *****, is literally a thing with *****
you know the FC logicon is just a circuit board and some switches mounted on the same enclosure.
you could very easily mount the "brains" somewhere and just use switches of your choice, where ever you want, the FD and Rx8 are like this. the Rx8 has a little box where the circuit opening relay is in the FC, and that's the brains. the thing with *****, is literally a thing with *****
11-11-14, 01:46 PM
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neat project!
you know the FC logicon is just a circuit board and some switches mounted on the same enclosure.
you could very easily mount the "brains" somewhere and just use switches of your choice, where ever you want, the FD and Rx8 are like this. the Rx8 has a little box where the circuit opening relay is in the FC, and that's the brains. the thing with *****, is literally a thing with *****
you know the FC logicon is just a circuit board and some switches mounted on the same enclosure.
you could very easily mount the "brains" somewhere and just use switches of your choice, where ever you want, the FD and Rx8 are like this. the Rx8 has a little box where the circuit opening relay is in the FC, and that's the brains. the thing with *****, is literally a thing with *****
11-11-14, 04:56 PM
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I've thought about that, and thought about that, and thought about that... And, still thinking about that. That might be what I end up having to do for the doors. I was trying to simplify it, since there is no AC, literally just off, low, med, high and cool, hot and defrost, face, foot but maybe what I'm trying to do is not actually the "best" option. I might be over thinking this one.
the temp thing could be also simple, lots of people using coat hangers in place of the motor, so maybe a 1st gen Rx7/80's B truck rotating heater **** would be the ticket, its a cable. the miata is a slider.
the other function i don't really know about, as its the reliable one...
11-11-14, 05:47 PM
#20
The cable drive Miata control panel exactly duplicates the functions of the electronic FC logicon, the more "modern" and complex system brings nothing new to the operation of the HVAC. Now, if you really went modern and put in a setup like say a Lexus, where you just tell it what temp you want and it figures out how to get there...then I could see it.
I'm also interested in your control layout...how far along are you with that?
11-12-14, 04:23 PM
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I figured you were beyond the "thinking" stage and well into the "doing" part, so I refrained from saying...I'd rethink the basic assumption that "more electrics= more modern= more better".
The cable drive Miata control panel exactly duplicates the functions of the electronic FC logicon, the more "modern" and complex system brings nothing new to the operation of the HVAC. Now, if you really went modern and put in a setup like say a Lexus, where you just tell it what temp you want and it figures out how to get there...then I could see it.
I'm also interested in your control layout...how far along are you with that?
The cable drive Miata control panel exactly duplicates the functions of the electronic FC logicon, the more "modern" and complex system brings nothing new to the operation of the HVAC. Now, if you really went modern and put in a setup like say a Lexus, where you just tell it what temp you want and it figures out how to get there...then I could see it.
I'm also interested in your control layout...how far along are you with that?
actually if you wanted a fully automatic setup, this is possible, the Rx8 had it, you need the brain box, the face plate, a couple of sensors, the blower transistor (its not a resistor), and preferably the dash wiring harness. actually the FC had it too, but sourcing the parts seems like it would be tricky, and its less modular than the Rx8 setup
i installed the fully auto climate controls in my Rx8, 1st in north america as far as i know (it wasn't offered here until 09, but standard everywhere else in 03), and both works very nicely, and is completely pointless at the same time
11-17-14, 12:00 PM
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