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Toymods Social Secretary
Location:
Sydney
Registered:
July 2002
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Location:
Melbourne
Registered:
May 2002
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Re: GUIDE - How to wire up thermofans
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Tue, 03 May 2005 03:13
 
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show pin numbers dude holden relays have non standard pin out
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Location:
Adelaide
Registered:
September 2003
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Re: GUIDE - How to wire up thermofans
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Tue, 03 May 2005 03:14
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Go the crayons.
Thanks for that, it will be a great help.
One question though (for the non-electrically minded people like me) ;
Is the need for the two relays because of the normally closed switch ?
If that is so, can one realy be a smaller ratuing than the main power driver relay ?
Also, since I'll have two fans (Ford EL setup), do you repeat the cct for the second fan, or can the signal relay drive a separate relay for each fan such that you end up with 3 relays in total ?
Pretty please revise the diagram to suit, as my drawing skills are not like yours 
Cheers
Michael B
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Location:
Bayside Melbourne.
Registered:
May 2003
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Re: GUIDE - How to wire up thermofans
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Tue, 03 May 2005 03:23
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Where were you when I was confused... Trying to work it out was a real headfuck.
That's a good diagram. 
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Location:
Arthurs Creek, Victoria
Registered:
May 2002
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Re: GUIDE - How to wire up thermofans
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Tue, 03 May 2005 03:27
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Just a disclaimer, there is a fair possibility that it can be done markedly easier if you have an aftermarket ECU. Maybe even with a standard ECU (though I doubt it).
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Location:
Campbelltown
Registered:
November 2003
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Location:
Bayside Melbourne.
Registered:
May 2003
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Re: GUIDE - How to wire up thermofans
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Tue, 03 May 2005 03:35
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It's not just you... I was going to point that out too. lol 
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Toymods Social Secretary
Location:
Sydney
Registered:
July 2002
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Re: GUIDE - How to wire up thermofans
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Tue, 03 May 2005 03:51
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i challenge anyone else to try and draw an example of a remote thermostat housing WITH A DODGY MOUSE .... and then forget to label it
Allan - holden relays can git fvcked. I have shown the pins of your STANDARD 5 PIN HORN RELAY available just about everywhere.
Baaachchcuhueuyyyyyyyyyy - you have the correct idea
The left hand relay simply turns power on to feed to the second (temp switched) relay, so that the fan isnt turned on when the car is turned off.
THUS, you are correct, and for two fans you can have just 3 relays, with the right hand relay being duplicated for each extra fan. I would only bother doing this if each fan has a separate thermoswitch though. If they run off the same control, its not necessary.
Remember though... each relay can handle only 30amps.
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Location:
Terrigal
Registered:
May 2002
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Re: GUIDE - How to wire up thermofans
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Tue, 03 May 2005 04:41
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Very good I recently had a massive headache trying to wire up a standard toyota normally closed sensor thermofan.
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I supported Toymods
Location:
Epping, Sydney
Registered:
May 2002
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Re: GUIDE - How to wire up thermofans
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Tue, 03 May 2005 05:33
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ok, quick Q
I blew my 30A fuse due to stupidity, and only had a 40A handy to replace it. I take it this means I'm gonna blow my relay if anything goes wrong before my fuse, so I should most liekly change this back to a 30A... yes?
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Toymods Social Secretary
Location:
Sydney
Registered:
July 2002
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Re: GUIDE - How to wire up thermofans
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Tue, 03 May 2005 06:14
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theoretically yes... but the MAIN reason you have a fues in power cables is so that if your power cable were to SHORT out onto the chassis, it does not catch fire and burn the whole car down.
When unfused power cable shorts to earth the cable itself acts like a fuse... going red hot, welding to the chassis, and eventually melting the wires insulation to the point of catching fire and possibly xploding the battery 
Greg, you should be fine..... 10A difference is close enough If you are concerned though, replace it for peace of mind. Myself personally i wouldnt care (both relays and fuses are disposable items IMHO)
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On Probation
Location:
nsw
Registered:
March 2004
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Re: GUIDE - How to wire up thermofans
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Tue, 03 May 2005 06:15
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Does a 1GGTE have a sensor on the motor or is it in the radiator ?
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Location:
sydney
Registered:
March 2003
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Re: GUIDE - How to wire up thermofans
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Tue, 03 May 2005 06:26
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hey allan for any other car apart from holden i would never use a holden relay
if u accidently plug a holden rtelay into a normal relay setup u can blow fuse
just for future sake i prefer the std bosch
or just get toyota relays from wreckers
2nd hand toyota and nmissan relays are the best
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Location:
Melbourne
Registered:
May 2002
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Re: GUIDE - How to wire up thermofans
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Tue, 03 May 2005 06:30
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| sideshow wrote on Tue, 03 May 2005 16:26 |
hey allan for any other car apart from holden i would never use a holden relay
if u accidently plug a holden rtelay into a normal relay setup u can blow fuse
just for future sake i prefer the std bosch
or just get toyota relays from wreckers
2nd hand toyota and nmissan relays are the best
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yes well last thermo fan job someone else got the relays and had me puzzled for a few mins
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Location:
Adelaide
Registered:
September 2003
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Re: GUIDE - How to wire up thermofans
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Tue, 03 May 2005 06:56
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| THE WITZL wrote on Tue, 03 May 2005 13:21 |
Baaachchcuhueuyyyyyyyyyy - you have the correct idea
The left hand relay simply turns power on to feed to the second (temp switched) relay, so that the fan isnt turned on when the car is turned off.
THUS, you are correct, and for two fans you can have just 3 relays, with the right hand relay being duplicated for each extra fan. I would only bother doing this if each fan has a separate thermoswitch though. If they run off the same control, its not necessary.
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Cheers.
Can't you redraw it though 
Pwetty pwease .......
I'll be using a holden cct/realy board for obvious resons, so I'll make sure that I have the correct connections on the relays
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I Supported Toymods
Location:
melbourne.vic.au
Registered:
May 2002
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Re: GUIDE - How to wire up thermofans
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Tue, 03 May 2005 06:59
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| Allan wrote on Tue, 03 May 2005 13:13 |
show pin numbers dude holden relays have non standard pin out
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That is right we found out the hard way 
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Location:
sydney
Registered:
March 2003
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Re: GUIDE - How to wire up thermofans
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Tue, 03 May 2005 07:46
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just off top of my head no import toyota has any thermo sensor on the engine eg block/head
i might be worng but theres too many to think bout
1j no
2j no
4a on top of gbox
4e has but its usually 3 pin plug combined coolant temp switch
1uz no
1gg no
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Location:
Adelaide, SA
Registered:
May 2002
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Re: GUIDE - How to wire up thermofans
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Tue, 03 May 2005 08:02
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My 1g-gte ones sit just near the thermostat housing... a part of the head (depends on what you count as the head I guess).
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Location:
sydney
Registered:
March 2003
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Re: GUIDE - How to wire up thermofans
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Tue, 03 May 2005 08:06
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is that a factory one
i know they have a sensor there for the a/c blue /white wire
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Location:
Bayside Melbourne.
Registered:
May 2003
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Re: GUIDE - How to wire up thermofans
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Tue, 03 May 2005 08:28
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The 7M didn't have thermoswitch for fans from factory but there is a spare hole in the thermostat housing that one fits in. This switch was from an SV21
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I supported Toymods
Location:
melbourne
Registered:
June 2002
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I Supported Toymods
Location:
Glenmore Park, NSW
Registered:
March 2004
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Re: GUIDE - How to wire up thermofans
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Tue, 03 May 2005 09:57
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I can number the relay pinouts if need be?
meh i was bored.... whitzl you need to number this system....lol
WST Tools ... now WST Systems!
Cheers
Nathan
PS whats the cut in temp on the SV21 thermo switch any1?
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Toymods Social Secretary
Location:
Sydney
Registered:
July 2002
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Re: GUIDE - How to wire up thermofans
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Tue, 03 May 2005 11:22
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it would actually be WSS - Witzl Service Systems....
Not quite the same though
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I Supported Toymods
Location:
Glenmore Park, NSW
Registered:
March 2004
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Location:
Bottom of the hill, Sydney
Registered:
April 2004
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Re: GUIDE - How to wire up thermofans
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Tue, 03 May 2005 12:12
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Shouldn't the wires on the second relay be on 30 & 87a instead of 87 & 87a?
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Toymods Social Secretary
Location:
Sydney
Registered:
July 2002
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Location:
Perth, WA
Registered:
December 2004
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Re: GUIDE - How to wire up thermofans
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Tue, 03 May 2005 14:05
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BONG THERMOSTAT!
i wouldnt think its so complicated to turn on a fan!
Witzl, your way way way too smart man, please siphon some on to me, lord knows i need it 
Eldar.O.
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Location:
Adelaide
Registered:
September 2003
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Re: GUIDE - How to wire up thermofans
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Tue, 03 May 2005 21:07
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| bbaacchhyy wrote on Tue, 03 May 2005 16:26 |
| THE WITZL wrote on Tue, 03 May 2005 13:21 |
Baaachchcuhueuyyyyyyyyyy - you have the correct idea
The left hand relay simply turns power on to feed to the second (temp switched) relay, so that the fan isnt turned on when the car is turned off.
THUS, you are correct, and for two fans you can have just 3 relays, with the right hand relay being duplicated for each extra fan. I would only bother doing this if each fan has a separate thermoswitch though. If they run off the same control, its not necessary.
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Cheers.
Can't you redraw it though
Pwetty pwease .......
I'll be using a holden cct/realy board for obvious resons, so I'll make sure that I have the correct connections on the relays
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Ask nicely and ye shall receive..
Many thanks guys
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I supported Toymods
Location:
Perth
Registered:
October 2003
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Re: GUIDE - How to wire up thermofans
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Sat, 21 May 2005 01:18
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Sticky this thread.
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Location:
Sydney
Registered:
April 2005
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