Hello! Log in or Register   |  Help  |  Donate  |  Buy Shirts  See all banner ads | Advertise on TheSamba.com  
TheSamba.com
 
Adding a toggle switch to control the radiator fan
Page: 1, 2  Next
Forum Index -> Vanagon Share: Facebook Twitter
Reply to topic
Print View
Quick sort: Show newest posts on top | Show oldest posts on top View previous topic :: View next topic  
Author Message
insyncro
Banned


Joined: March 07, 2002
Posts: 15087
Location: New York
insyncro is offline 

PostPosted: Wed Jun 13, 2012 6:58 am    Post subject: Adding a toggle switch to control the radiator fan Reply with quote

I have searched, found nothing and while transferring my files from one computer to another have lost some old data, this wiring upgrade schematic unfortunately... Crying or Very sad

Can someone post a link, diagram or just explain the proper way to connect a toggle switch to turn on the rad fan.
I am going to do this in a carat van and do not want to just turn on the AC.

I still want the thermo switch to be inline and the AC to activate it as well.

Ideally I would love to have different speeds with the toggle and I have multi position toggles, but just on off works for now.

Thanks in advance.
Back to top
View user's profile Send private message Gallery Classifieds Feedback
crazyvwvanman
Samba Member


Joined: January 28, 2008
Posts: 8068
Location: Orbiting San Diego
crazyvwvanman is offline 

PostPosted: Wed Jun 13, 2012 7:26 am    Post subject: Re: Adding a toggle switch to control the radiator fan Reply with quote

The simplest way is to use the switch to trigger the high speed fan relay. That way the switch and its wires don't have to carry any real current. This also bypasses the failure prone fan resistor from your manual fan setup, assuming an 86+ that came with factory A/C.

Mark

insyncro wrote:

Can someone post a link, diagram or just explain the proper way to connect a toggle switch to turn on the rad fan.
I am going to do this in a carat van and do not want to just turn on the AC.

I still want the thermo switch to be inline and the AC to activate it as well.

Ideally I would love to have different speeds with the toggle and I have multi position toggles, but just on off works for now.


Last edited by crazyvwvanman on Wed Jun 13, 2012 7:31 am; edited 1 time in total
Back to top
View user's profile Send private message Gallery Classifieds Feedback
hdenter
Samba Member


Joined: October 14, 2008
Posts: 2140
Location: San Luis Obispo, CA
hdenter is offline 

PostPosted: Wed Jun 13, 2012 7:27 am    Post subject: Reply with quote

Not sure how others have done it, but the PO of my van did it like this.

He mounted a weather proof relay behind the grill close to the thermo switch wired to the hot lead in and the fast speed out. He then ran the control lead from the ignition to a toggle and then to the relay. This way, when I trip my toggle, the relay jumpers the thermo and runs the fan. The existing fuses still function for the fan and the toggle. Works great! Hate to see the needle climb when I am stuck in traffic and waiting for the thermo to reach its threshold and kick on. The thermo does work and every once in a while I forget that this van has the over ride and the fan kicks on when things get hot enough. Good Luck!

Hans
_________________
'84 sunroof vanagon
'85 weekender
'96 golf
'07 Passat Wgn
Back to top
View user's profile Send private message Classifieds Feedback
jstar89crx
Samba Member


Joined: September 19, 2005
Posts: 156
Location: Bellingham WA
jstar89crx is offline 

PostPosted: Wed Jun 13, 2012 7:27 am    Post subject: Reply with quote

I have a 3 way low/off/high switch in my van for radiator fan. You will want to use a relay for the high side of the switch. I did mine a couple years ago, I feel like all the existing wiring and switches and resistors are behind the front grille, I ended up connecting to these and ran my wires into the van to a switch mounted in the instrument cluster. Unfortunately I am away from my van for a bit. You can PM me later this week if someone else doesn't have the info you need and I will go take mine apart to remind myself how I did it. Good luck.
_________________
86 Syncro, weekender carat interior, the rest is bone stock for now
SOLD:91 Westy, BEW TDI with VNT17 Turbo, water cooled intercooler, Malone Tune, taller 3rd and 4th.
Back to top
View user's profile Send private message Gallery Classifieds Feedback
insyncro
Banned


Joined: March 07, 2002
Posts: 15087
Location: New York
insyncro is offline 

PostPosted: Wed Jun 13, 2012 7:32 am    Post subject: Reply with quote

Thanks Everyone.

Any pictures, part numbers or schematics would really help.

I've got it under control and will use Marks method first, but would like to keep the info. flowin here for others who may have more questions.
Back to top
View user's profile Send private message Gallery Classifieds Feedback
insyncro
Banned


Joined: March 07, 2002
Posts: 15087
Location: New York
insyncro is offline 

PostPosted: Wed Jun 13, 2012 7:35 am    Post subject: Re: Adding a toggle switch to control the radiator fan Reply with quote

crazyvwvanman wrote:
The simplest way is to use the switch to trigger the high speed fan relay. That way the switch and its wires don't have to carry any real current. This also bypasses the failure prone fan resistor from your manual fan setup, assuming an 86+ that came with factory A/C.

Mark

insyncro wrote:

Can someone post a link, diagram or just explain the proper way to connect a toggle switch to turn on the rad fan.
I am going to do this in a carat van and do not want to just turn on the AC.

I still want the thermo switch to be inline and the AC to activate it as well.

Ideally I would love to have different speeds with the toggle and I have multi position toggles, but just on off works for now.


Yes 1990 Vanagon Carat with factory AC.

The resistor is behind the drivers headlamp...where is the hi speed fan relay located Embarassed
Back to top
View user's profile Send private message Gallery Classifieds Feedback
fairweather
Samba Member


Joined: August 26, 2007
Posts: 663
Location: Aspen, CO
fairweather is offline 

PostPosted: Wed Jun 13, 2012 7:45 am    Post subject: Reply with quote

10c has posted a how-to with diagrams, try searching with his username.
Back to top
View user's profile Send private message Send e-mail Visit poster's website Gallery Classifieds Feedback
crazyvwvanman
Samba Member


Joined: January 28, 2008
Posts: 8068
Location: Orbiting San Diego
crazyvwvanman is offline 

PostPosted: Wed Jun 13, 2012 7:45 am    Post subject: Re: Adding a toggle switch to control the radiator fan Reply with quote

The high speed relay for that model is by itself, hidden up high on the left end behind the dash. You don't need to get to it though. One of the 3 wires from the rad temp switch is the relay trigger wire. If you slice your switched wire into that one the switch will trigger the relay. The wire from the rad temp switch is the smallest one, red/blue.

The relay only needs about 1/10 of an amp so the switch and switch wires can be small.

Don't use a lighted switch or at least don't ground the switch if it is a lighted type.

Mark

insyncro wrote:
Yes 1990 Vanagon Carat with factory AC.

The resistor is behind the drivers headlamp...where is the hi speed fan relay located Embarassed
Back to top
View user's profile Send private message Gallery Classifieds Feedback
insyncro
Banned


Joined: March 07, 2002
Posts: 15087
Location: New York
insyncro is offline 

PostPosted: Wed Jun 13, 2012 7:48 am    Post subject: Reply with quote

Thank you Mark.

I will try to post my work on this as time permits.

Much appreciated Exclamation
Back to top
View user's profile Send private message Gallery Classifieds Feedback
presslab
Samba Member


Joined: September 29, 2008
Posts: 1730
Location: Sonoma County
presslab is offline 

PostPosted: Wed Jun 13, 2012 8:36 am    Post subject: Reply with quote

Is there a technical reason to add a manual switch if the rest of the system is working fine?

I could see it relieving psychological tension for those that worry about the needle; so in this case, why not. In newer cars, the temperature gauge will hold steady even though the actual temperature can fluctuate quite a bit. The designers realized it's human nature to worry about such things, even though it doesn't matter to the engine.
_________________
1986 Vanagon Westfalia EJ25
1988 Subaru GL-10 EJ20G --- 2000 Honda XR650L
2010 Titus El Guapo --- 2011 On-One 456 Ti
Back to top
View user's profile Send private message Gallery Classifieds Feedback
floggingmolly
Samba Member


Joined: April 06, 2007
Posts: 1106
Location: San Diego, CA
floggingmolly is offline 

PostPosted: Wed Jun 13, 2012 8:45 am    Post subject: Reply with quote

presslab wrote:
Is there a technical reason to add a manual switch if the rest of the system is working fine?


I was thinking the same thing. Kinda like my post on the low temp thermostat.

presslab wrote:
I could see it relieving psychological tension for those that worry about the needle; so in this case, why not. In newer cars, the temperature gauge will hold steady even though the actual temperature can fluctuate quite a bit. The designers realized it's human nature to worry about such things, even though it doesn't matter to the engine.


I was thinking about this during our last trip. I was wondering why the needle on the van is constantly moving up and down (well, not constantly but you know what I mean) and why on newer cars it just come up to about half way and stops.
_________________
'85 Wolfsburg Weekender
Back to top
View user's profile Send private message Gallery Classifieds Feedback
insyncro
Banned


Joined: March 07, 2002
Posts: 15087
Location: New York
insyncro is offline 

PostPosted: Wed Jun 13, 2012 9:05 am    Post subject: Reply with quote

The van is dyno test mule for various engine conversions, has a cooling system I have updated for my purposes and will not see the road ever again.

I am testing a bunch of different scenarios with this van.

Yes, being able to turn the fan on and off, without the thermo switch engaging or having the AC engage it, is something I personally want, to be able to test different things.

Call me crazy Laughing
Back to top
View user's profile Send private message Gallery Classifieds Feedback
Wildthings
Samba Member


Joined: March 13, 2005
Posts: 40924

Wildthings is online now 

PostPosted: Wed Jun 13, 2012 9:10 am    Post subject: Reply with quote

floggingmolly wrote:
presslab wrote:
Is there a technical reason to add a manual switch if the rest of the system is working fine?


I was thinking the same thing. Kinda like my post on the low temp thermostat.

presslab wrote:
I could see it relieving psychological tension for those that worry about the needle; so in this case, why not. In newer cars, the temperature gauge will hold steady even though the actual temperature can fluctuate quite a bit. The designers realized it's human nature to worry about such things, even though it doesn't matter to the engine.


I was thinking about this during our last trip. I was wondering why the needle on the van is constantly moving up and down (well, not constantly but you know what I mean) and why on newer cars it just come up to about half way and stops.


My gauge reads pretty much rock steady, but I use a low temperature fan switch that kicks the fan on as soon as I slow down instead of waiting until the coolant temperature begins to climb.
Back to top
View user's profile Send private message Gallery Classifieds Feedback
insyncro
Banned


Joined: March 07, 2002
Posts: 15087
Location: New York
insyncro is offline 

PostPosted: Wed Jun 13, 2012 9:12 am    Post subject: Reply with quote

Wildthings wrote:
floggingmolly wrote:
presslab wrote:
Is there a technical reason to add a manual switch if the rest of the system is working fine?


I was thinking the same thing. Kinda like my post on the low temp thermostat.

presslab wrote:
I could see it relieving psychological tension for those that worry about the needle; so in this case, why not. In newer cars, the temperature gauge will hold steady even though the actual temperature can fluctuate quite a bit. The designers realized it's human nature to worry about such things, even though it doesn't matter to the engine.


I was thinking about this during our last trip. I was wondering why the needle on the van is constantly moving up and down (well, not constantly but you know what I mean) and why on newer cars it just come up to about half way and stops.


My gauge reads pretty much rock steady, but I use a low temperature fan switch that kicks the fan on as soon as I slow down instead of waiting until the coolant temperature begins to climb.


Please post the part number of the switch you are using.
Thanks for the info.
Back to top
View user's profile Send private message Gallery Classifieds Feedback
insyncro
Banned


Joined: March 07, 2002
Posts: 15087
Location: New York
insyncro is offline 

PostPosted: Wed Jun 13, 2012 9:15 am    Post subject: Reply with quote

http://www.van-cafe.com/home/van/page_1349

Thanks Jay.
Posting for others to check out.
Back to top
View user's profile Send private message Gallery Classifieds Feedback
presslab
Samba Member


Joined: September 29, 2008
Posts: 1730
Location: Sonoma County
presslab is offline 

PostPosted: Wed Jun 13, 2012 9:20 am    Post subject: Reply with quote

Wildthings wrote:
My gauge reads pretty much rock steady, but I use a low temperature fan switch that kicks the fan on as soon as I slow down instead of waiting until the coolant temperature begins to climb.


Is this what you have?

http://www.van-cafe.com/home/van/page_1349_223/fan_controller.html
Image may have been reduced in size. Click image to view fullscreen.


And what is your reason for using it?

I like a vehicle speed fan controller, it's an interesting idea. The Subaru ECU has this intelligence in it. I sometimes wish I'd hooked it all up, so with A/C on the fan isn't powered going down the freeway. Right now I'm just using the Vanagon thermoswitch and the normal Behr A/C wiring.
_________________
1986 Vanagon Westfalia EJ25
1988 Subaru GL-10 EJ20G --- 2000 Honda XR650L
2010 Titus El Guapo --- 2011 On-One 456 Ti
Back to top
View user's profile Send private message Gallery Classifieds Feedback
presslab
Samba Member


Joined: September 29, 2008
Posts: 1730
Location: Sonoma County
presslab is offline 

PostPosted: Wed Jun 13, 2012 10:58 am    Post subject: Reply with quote

insyncro wrote:
The van is dyno test mule for various engine conversions, has a cooling system I have updated for my purposes and will not see the road ever again.


The radiator fan will not flow near the same amount of air that a typical dyno fan will flow. For example, the link below shows two 1200W fans. The Vanagon fan is at best a single 450W fan. I'm not sure your override will have the result you desire.

http://www.dynoblower.com/product.sc?productId=1&categoryId=6
_________________
1986 Vanagon Westfalia EJ25
1988 Subaru GL-10 EJ20G --- 2000 Honda XR650L
2010 Titus El Guapo --- 2011 On-One 456 Ti
Back to top
View user's profile Send private message Gallery Classifieds Feedback
Wildthings
Samba Member


Joined: March 13, 2005
Posts: 40924

Wildthings is online now 

PostPosted: Wed Jun 13, 2012 4:31 pm    Post subject: Reply with quote

presslab wrote:
Wildthings wrote:
My gauge reads pretty much rock steady, but I use a low temperature fan switch that kicks the fan on as soon as I slow down instead of waiting until the coolant temperature begins to climb.


Is this what you have?


No the switch I use is the same part number as the stock switch, but with a -75 suffix added. It works well with the stock (87C) thermostat.

Part #25195948175, available through Bus Depot and many other sources.
Back to top
View user's profile Send private message Gallery Classifieds Feedback
insyncro
Banned


Joined: March 07, 2002
Posts: 15087
Location: New York
insyncro is offline 

PostPosted: Wed Jun 13, 2012 6:00 pm    Post subject: Reply with quote

presslab wrote:
insyncro wrote:
The van is dyno test mule for various engine conversions, has a cooling system I have updated for my purposes and will not see the road ever again.


The radiator fan will not flow near the same amount of air that a typical dyno fan will flow. For example, the link below shows two 1200W fans. The Vanagon fan is at best a single 450W fan. I'm not sure your override will have the result you desire.

http://www.dynoblower.com/product.sc?productId=1&categoryId=6


I know and have the dyno fans.
I'm testing things like water wetter, Evans coolant and a few different other cooling and AC products.
Not just dyno tuning the engine.
Not all tests are being done while on the dyno and having the ability to run that fan without having any other variables changed with the motor, like the AC compressors pumpin is needed.
Back to top
View user's profile Send private message Gallery Classifieds Feedback
Syncroincity
Samba Member


Joined: April 15, 2007
Posts: 1557
Location: New York City
Syncroincity is offline 

PostPosted: Wed Jun 13, 2012 7:12 pm    Post subject: Reply with quote

I'm putting in the same switch, because I'm running an intercooler radiator up front, and I want to be able to keep ahead of the heat load in slow speed / hi-boost situations like offroading.
_________________
'86 Syncro CHC Top AAZ Turbodiesel
'04 Passat Variant 4Mo 5MT

Vanagon Build: http://www.thesamba.com/vw/forum/viewtopic.php?t=466866&highlight=
Back to top
View user's profile Send private message Send e-mail Gallery Classifieds Feedback
Display posts from previous:   
Reply to topic    Forum Index -> Vanagon All times are Mountain Standard Time/Pacific Daylight Savings Time
Page: 1, 2  Next
Page 1 of 2

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum

About | Help! | Advertise | Donate | Premium Membership | Privacy/Terms of Use | Contact Us | Site Map
Copyright © 1996-2018, Everett Barnes. All Rights Reserved.
Not affiliated with or sponsored by Volkswagen of America | Forum powered by phpBB