can anyone do me a wireing diagram to wire up a second fan through a relay would be much appreciated

 

anyone

 

is the fan on an overide or on the temp switch??

dev

 

no a completely seperate one the engine runs warm so want to run a second one for when stuck in traffic
any help apreciated

 

So you want one with a switch then?

 

yeah thats rite mate a seperate fan from normal one

 

anyone come on someone must b good with electrics in this section pleaseeeee

 

What current or power rating is the fan? I will try and draw a circuit diagram on my PC an e mail you it if you want, I have no idea how I would post it on the BB, sorry.

Charlie

 

the fans a s2 one so just a 12v current if you could it would be much aprreciated
my email addy is paulrscab@hotmail.com
cheers in advance mate

 

Hi m8, 12V is the voltage not the current, the current is measured in Amps (Amperes), no worries though if it's a standard RST one the it'll be 10A or 15A not sure though, you'll have to check the value of the fuse in the fusebox for your existing fan.

 

i think its a 30 amp will check tonight mate

 

I think u might be right. I tried to send you the wiring diagram but it got returned to me undelivered? Will try again now.

 

cool much appreciated

 

When you get a relay go for one that has
a built in fuseholder piggy backed on to it, Hella definately do them, the
Relay will need to be 12V and capable of handling the current rating of the
fan, if not it will melt the contacts inside and if you're really unlucky it
will melt! The wires from the battery to the switch and from the relay to
the switch don't need to be too heavy, capable of carrying 3A, say 0.5mm
would do the job. The wire from the relay to the fan does need to be a bit
heavier though as it will be carrying about 25 to 30A (Check the value of
the fuse in your fuse box for your existing fan.) 1.75-2.0mm should do it.
On the top/side of the relay there will be a picture of the wiring for the relay, one side has a coil and the other a switch. Your dash switch needs to be connected to the coil, the other side of the dash switch needs to be connected to the battery supply, it's probably best to get an illuminating one. The other side of the coil on the relay will need to be earthed. On the switch side of the relay one end goes to the fuse which goes to the battery and the other side of the relay switch goes to the fan(Black and red wire). The Fan will also need to be earthed using the Brown wire.
Am sorry I couldn't post up the sketchy circuit diagram. Hope this helps!

 

sounds good mate will sit and study it later is that using a 3 pin or 5 pin relay mate

 

I don't think you can get a 3 pin Relay, unless the case is metal and earthed. You should go for a 4 pin SPNO (Single Pole Normally Open) Relay. I just had a look and the terminals on the relayand they should be numbered 30, 85, 86 and 87.

Relay Switch

30- Supply for the Fan (via fuse from Battery)
87- Supply from the Relay to the Fan

Relay Coil

85- Supply Signal from the Dash switch
86- Earth.

 

cheers mate will have a go later on and see how i do