Not your typical e-fan wiring help please!!

[mad-ass]

Any wiring guru's want to help me with the fan wiring?

Car: S14.

I have dual fan's with single speed.[Isis/Mishimoto/CXRacing fan shroud+fans]

I want to use DPDT/ON-OFF-ON switch as HIGH[two fans on]-OFF-LOW[one fan on]. I already have the switch, but it only has 3 connections on the back of the switch, not 6. I'm fairly picky when it comes to toggle switches and this is the only one I could find that I liked.

and also use SPDT relay per fan so that it turns 1 relay on low, and both relays on high.

SPDT relay because I already have bunch of them already that I can use. but also want to keep things simple as possible and only use two relays.

I tried to figure this out, but I can only come up with a schematics using 3 relays, not two.

Help!

Thanks.

[krappy]

Any wiring guru's want to help me with the fan wiring?

Car: S14.

I have dual fan's with single speed.[Isis/Mishimoto/CXRacing fan shroud+fans]

I want to use DPDT/ON-OFF-ON switch as HIGH[two fans on]-OFF-LOW[one fan on]. I already have the switch, but it only has 3 connections on the back of the switch, not 6. I'm fairly picky when it comes to toggle switches and this is the only one I could find that I liked.

and also use SPDT relay per fan so that it turns 1 relay on low, and both relays on high.

SPDT relay because I already have bunch of them already that I can use. but also want to keep things simple as possible and only use two relays.

I tried to figure this out, but I can only come up with a schematics using 3 relays, not two.

Help!

Thanks.
dont see whats too difficult..

w/ switch in position 1 make it trigger a single relay
w/ switch in position 2 make it trigger both relays

[surfpac]

dont see whats too difficult..

w/ switch in position 1 make it trigger a single relay
w/ switch in position 2 make it trigger both relays


Draw that out and you'll see that he needs a toggle switch with 6 prongs on back or have to use 3 relays with his 3 prong switch. I bet you didn't draw a sketch, right.

[surfpac]

Any wiring guru's want to help me with the fan wiring?

Car: S14.

I have dual fan's with single speed.[Isis/Mishimoto/CXRacing fan shroud+fans]

I want to use DPDT/ON-OFF-ON switch as HIGH[two fans on]-OFF-LOW[one fan on]. I already have the switch, but it only has 3 connections on the back of the switch, not 6. I'm fairly picky when it comes to toggle switches and this is the only one I could find that I liked.

and also use SPDT relay per fan so that it turns 1 relay on low, and both relays on high.

SPDT relay because I already have bunch of them already that I can use. but also want to keep things simple as possible and only use two relays.

I tried to figure this out, but I can only come up with a schematics using 3 relays, not two.

Help!

Thanks.

Use a 6 prong switch.

[surfpac]

Use this as a guide.. relay is from Volvo 850
http://i584.photobucket.com/albums/ss289/surfpac/Auto/TaurusWireVolvoFanSwitch.png?t=1277236306

[surfpac]

Also, if you get an Audi fan resistor, from an early 90's V6 Audi 90, you can could run both fans low or high speed. Just another option.
http://i584.photobucket.com/albums/ss289/surfpac/th_AudiFanResistor.jpg

[surfpac]

Use the Volvo fan relay wiring diagram and look at this resistor wiring for the Audi fans and this should get you going.
http://i584.photobucket.com/albums/ss289/surfpac/Auto/AudiFanCircuit.jpg?t=1278083500

[surfpac]

BTW, you have 2 existing factory relays in your S14.

[krappy]

Draw that out and you'll see that he needs a toggle switch with 6 prongs on back or have to use 3 relays with his 3 prong switch. I bet you didn't draw a sketch, right.


thing is he's not running a multi-speed fan... his fans are single speed

[surfpac]

Yes, I know that. Draw the sketch using 2 relays and the 3 prong switch and see what you come up with. I had no success, maybe you can.

[mad-ass]

yeah, i went and tried 3 more layouts after i posted this. I actually like the idea of 3 relays because I do run the fans a lot and wouldn't mind taking a load off of the relay by having seperate relays for for low/single fan. or i can simplify this by getting the 6 pronged DPDT on-off-on switch and use the planned two relay system.

let's say Fan A and Fan B.

I want the Fan A wired to "low" position on the switch. and Fan A to turn on with "high" position when Fan B turns by the toggle switch command.
I also want the Fan B to turn on with the stock AC switch so I can just run low position or off with AC running[Yes, SR20DET and AC.....auuuugggggggg sick]
I don't want to have to turn on the heater defrost/AC to run the Fan A and B at same time.

of course it'll be up to me to know to put the toggle switch to low only when i have the AC running and what not..

thanks for all the help fellas, I just really needed to type this up somewhere. sometimes it just helps me to make a thread to figure things out.

I am going to go with the 3 SPDT relays for this, so each fans can have two relays' powering them.[3 relays from my new wiring, and 1 stock for AC/defrost]

[mad-ass]

https://fbcdn-sphotos-a.akamaihd.net/hphotos-ak-snc6/33648_165188270162744_100000147175220_577086_12173 84_n.jpg
btw, that's my current setup using the DPDT 3 prong toggle switch with 2 40amp ford yellow SPDT for the ford Tarus Fan, wired for High and Low, but only using 1 relay per each switch setting. Looking to completely ditch the Tarus fan, it cools awesome and all, but it just takes way too much amps to run it.

[mad-ass]

BTW, you have 2 existing factory relays in your S14.

Yup..but that's for the stock fan to turn on high or low when the AC/defrost on. I never seen that one turn the fan on because it was too hot. only turned on with AC/Defrost on.

[surfpac]

Yup..but that's for the stock fan to turn on high or low when the AC/defrost on. I never seen that one turn the fan on because it was too hot. only turned on with AC/Defrost on.

Didn't know you were running SR in S14. You said S14 so I assumed KA24 as well. The stock fan relays would probably fry if you're running the Taurus fans because that beast pulls some serious amps. BTW, I thought the Taurus was 1 big single fan that was 2 speeds. The RX7 guys love these fans cuz thats one of the best fans to cool a rotary. Hey, look into Altima fans or dual fans from an early 90's Audi V6. They don't draw as much as a Taurus and cools well. The Audi fan shroud width is perfect for the SR/KA radiators and all you have to do is modify the bottom piece.

[mad-ass]

Didn't know you were running SR in S14. You said S14 so I assumed KA24 as well. The stock fan relays would probably fry if you're running the Taurus fans because that beast pulls some serious amps. BTW, I thought the Taurus was 1 big single fan that was 2 speeds. The RX7 guys love these fans cuz thats one of the best fans to cool a rotary. Hey, look into Altima fans or dual fans from an early 90's Audi V6. They don't draw as much as a Taurus and cools well. The Audi fan shroud width is perfect for the SR/KA radiators and all you have to do is modify the bottom piece.

well, SR or KA[I have both...in S14..lol], my Fan system is completely separate from the chassis harness. my current setup with Taurus fan is completely by itself and stock relay's are not incorporated with it in any ways. yes taurus fan is 1 giant 16" fan with high/low speed, and they pull madness amount of air. but their amperage usage is not something I am liking. burned up couple of 30A relays before I realized that they actually use 35amps or more to actually keep it running so that's when i switched to the ford yellow 40A SPDT relays.

i refuse to use altima fans because they do not fit well. i'm a half perfectionist if you couldn't tell from the fan switch setup itself. most people would just do single relay for two fans, and on/off toggle and call it good because race car. stupidest thing if you ask me UNLESS it really is a track only car.

on the S14 with KA, i have the isis fan shroud with dual fan. 1 fan wired up to single SPDT relay/fuseable link and SPDT switch for simple on/off operation, and other one to the stock harness to turn on with AC/Defrost. i found that to be good enough for daily driving with AC full on blast and i don't drive the car hard a lot, just few occasional track times[just couple of runs, not all day drifting]

but the S14 with SR is meant for track driving but also want the option of daily driving, that's the reason why I want this elaborated fan setup. and in effort to ditch the ford taurus fan, i ordered another shrouded fan with dual fans.

if it works out well, i am going to do the same setup on the KA. just because.

[240Shwag]

Use a diode, or maybe two.

[mad-ass]

diode will do what in this application..?

no idea how diode works.

[mad-ass]

Ok, so turns out I called my switch DPDT instead of SPDT. sorry about that confusion, but I got this response from another forum for the same thread.

He made it so 1 relay would turn both fan on high position, middle/OFF position is low, and low "on" position of OFF.

http://i84.photobucket.com/albums/k20/skater510_1984/electricfanhilowwiringdiagram2.png

Pretty good I must say.

seems like it's impossible to do the setup I want with the current items I got, so I am gona go buy me a actual DPDT switch and I should have able to fix this problem. OR use 3 relays.

I'll update you guys on how I do this.