Thermo Fan Wiring

Discuss technical aspects of your 4WD with other owners, and share your opinions
superg
Been here a while
Posts: 287
Joined: May 3rd, 2005, 10:37 pm

Thermo Fan Wiring

Unread post by superg » December 29th, 2006, 10:54 am

Hi guys I am wiring up a thermo fan, I have attached the wiring diagram that came with it but what i want to do is have a switch where I can have it run off the thermo switch but also if i need to manually override it so it comes on straight away. I have shown the switch in the diagram, does anyone knwo where i wire the switch into? thanks.

Image

jet-6
Been here a while
Posts: 336
Joined: December 13th, 2006, 9:41 am
Location: East Gippsland

Unread post by jet-6 » December 29th, 2006, 11:18 am

Thats an LPG setup diagram

superg
Been here a while
Posts: 287
Joined: May 3rd, 2005, 10:37 pm

Unread post by superg » December 29th, 2006, 1:43 pm

Sorry copied the wrong diagram, ive got the right one up now, any ideas how to wire the switch in? thanks.

BIG PATROL
Here and there
Posts: 39
Joined: January 21st, 2006, 12:41 pm
Location: yeppoon

Unread post by BIG PATROL » December 29th, 2006, 5:20 pm

run a wire from a power source, eg. battery or acc wire and put a switch in and the end of the wire goes to 86 on the relay. when the switch is turned on it will start the fan.
98 GU, 7inch springs, 2 inch body, lift front and rear airlocker and still spending money, what fun !!!

waz65
Been here a while
Posts: 295
Joined: December 7th, 2006, 4:21 pm

Unread post by waz65 » December 29th, 2006, 9:52 pm

Why would you want to manually overide the automatic system? to much margin for overheating the engine,the thermal switch should be adjustable
2000 GU TD42T - dual batteries and more to come
RUM IS GOOD , LETS HAVE ANOTHER :D

superg
Been here a while
Posts: 287
Joined: May 3rd, 2005, 10:37 pm

Unread post by superg » December 29th, 2006, 9:59 pm

Because in the event of the thermo switch failing i want backup to be able to run the fan on command rather than be stranded with no cooling, better to have a few more wires than be stuck somewhere having to wire it up then.

jet-6
Been here a while
Posts: 336
Joined: December 13th, 2006, 9:41 am
Location: East Gippsland

Unread post by jet-6 » December 30th, 2006, 12:01 am

Put the switch accross 30 and 86 in your pic

Clown Boy
Been here a while
Posts: 112
Joined: February 21st, 2005, 4:13 pm

Unread post by Clown Boy » December 30th, 2006, 9:48 am

I have the wire going into 86 hooked onto the power connection of my 3 position switch.

Position 1 is hooked onto the thermal switch.
Position 3 is hooked onto a continous power supply
Position 2 is an 'OFF' position.

When the switch is up, everything runs of the thermal switch.
When the switch is in the middle, the fan is off (i.e. for water crossings)
When the switch is down the fans are continously on
Transport Engineering and Trucking Services
Archerfield Brisbane
Call Simon on 0407 628 191, say Clown Boy sent you
He will look after your rig, trailer or fleet.

superg
Been here a while
Posts: 287
Joined: May 3rd, 2005, 10:37 pm

Unread post by superg » December 30th, 2006, 5:00 pm

Bingo, exactly what i was looking for Clown Boy, thanks for that! Does this pic look right now when its on 1 the fan is on all the time, when its on 2 its through thermo and when its in the middle its off, thanks mate.

Image

zoomer
Been here a while
Posts: 253
Joined: August 24th, 2006, 8:20 pm
Location: Townsville

Unread post by zoomer » December 30th, 2006, 5:49 pm

waz65 wrote:Why would you want to manually overide the automatic system? to much margin for overheating the engine,the thermal switch should be adjustable
I have an over ride on mine to switch it of if I dunk it in a creek or something
[url]http://www.4wdmonthly.com.au/shed/index.php?content=all&chunk=arbu&user=588[/url]
There is no substitute for cubic inches

waz65
Been here a while
Posts: 295
Joined: December 7th, 2006, 4:21 pm

Unread post by waz65 » January 1st, 2007, 4:13 pm

superg wrote:Because in the event of the thermo switch failing i want backup to be able to run the fan on command rather than be stranded with no cooling, better to have a few more wires than be stuck somewhere having to wire it up then.
Sorry mate , I understand where your coming from now, I ran davis craig thermos in my street and drag cars for years , never had any problems but saying that i never dunked any in water:)
2000 GU TD42T - dual batteries and more to come
RUM IS GOOD , LETS HAVE ANOTHER :D

superg
Been here a while
Posts: 287
Joined: May 3rd, 2005, 10:37 pm

Unread post by superg » January 1st, 2007, 5:42 pm

No worries mate, always good to ask and find out. Hopefully mine never fail as well.

Clown Boy
Been here a while
Posts: 112
Joined: February 21st, 2005, 4:13 pm

Unread post by Clown Boy » January 2nd, 2007, 10:05 am

Sorry mate, was off for a couple of days.

?Yes that is correct. Except for my always on position I wired a direct power supply (not off ignition).

Personal preference. I figured if I come close to overheating I can turn the engine off, leave the fans on and restart car in 10 minutes to recycle around the cooler water.

Probably not much of a difference though.
Transport Engineering and Trucking Services
Archerfield Brisbane
Call Simon on 0407 628 191, say Clown Boy sent you
He will look after your rig, trailer or fleet.

Return to “General Tech”