anyone know about electrics?

9th December 2010, 12:38

my fan isnt on auto its set to a switch,
on the right side of the fan there is a connector coming off and the wires are on a blue connector block and supost to plug into something and i carnt find where it plugs in
can someone tell me please?
or can someone look under there bonnet and see

9th December 2010, 14:16

The switch on the passenger side of your radiator closes the circuit when it senses coolant is to hot and this switches on the fan.

The switch you have to use manually has replaced the switch on the side of the radiator.

Circuit should be something like this:

earth---[-battery+]---[fuse]---[fan switch]---[fan motor]---earth

What you have is:

earth---[-battery+]---[fuse]---[manual switch]---[fan motor]---earth

9th December 2010, 15:24

thanks for the reply
so basicaly the fan connector on the right side is the fan switch and i take it this needs connecting to the back of the fan to get this working automatic again?

9th December 2010, 16:04

There will be a relay involved somewhere along the lines, maybe your wiring is something to do with it?

9th December 2010, 16:23

how would i get this fixed?
anyone here do this sort of stuff?
if so when i get it on the road i will pay someone here to do it

9th December 2010, 16:45

Sorry buddy - Stevo was about right with his diagram for a Mk.1. (No relay)

Follow (or a run a new) high gauge wire from Fuse 5 in engine compartment to the switch on the radiator then that to the fan itself. Id sort it for ya mate if you were local.

9th December 2010, 17:01

if i take a couple of photos of what i have and my wires could you have a little look at it mate and see what i have to do ?
and thanks for the reply

9th December 2010, 17:03

Yeh no problem..

9th December 2010, 17:04

nice one mate

10th December 2010, 13:45

hey outrage here those pix
as you can see the back of the fan is 2 wires
one is a earth and goes to the body and another goes all the way to the switch in the dash and comes back to the battery

and this pic is what comes from the right side of the rad
a couple of blue wires
and also a green one
the blue ones go into the rad connector and the green one goes down somewhere maybe its an earth

and heres a close up of that connector block thing

10th December 2010, 15:30

Right mate.. ive had a look

The yellow wire that connects to the fan is the + positive feed to the fan - which is supposed to connect to the engine bay fuse box (fuse 5). It's obviously been disconnected and run to a manual switch in the dash...

The blue wire out of the fan is the - negative feed - which is supposed to go through the switch on the radiator which earths when it gets to temperature and switches the fan on, then cuts off when the temperature drops.

The 3 way connector in 2nd and 3rd pictures connects to the radiator switch and is a standard loom connector for Mk 1 (single speed) and Mk 2 (dual speed) fans. The one your interested in is the middle blue wire, which needs to connect to the blue wire from the fan.

Where does the blue wire from your fan go? Does it have a connector on the end? If it does then it should fit straight onto that 3 wire connector - if it's been cut and put straight to earth, just solder it back on to the middle wire.

So what you need to do is run the yellow fan wire to the engine fuse box and solder it back on to fuse 5.

Run the blue fan wire to middle blue wire of that 3-way connector.

I hope this helps mate, if you need owt else just give me a shout

10th December 2010, 16:43

hi mate
the wires coming from the fan part are green and the other ones yellow
the green wire is screwed into the body and the yellow one goes to that switch mate
thanks for the reply mate

i apreciate it
i see what you mean tho so that yellow one to the fuse 5
and the greeny colour one to the middle blue wire?

i will have a go at this tomorrow because its too dark now mate,

just wondering tho
what about the other blue wire on that connector whats that for mate?

and can i buy a lead that plugs into that connector then plugs into that fan? or is that the only way to do it now mate

10th December 2010, 16:58

Yep buddy that should do the trick

Why was it put on a manual switch anyway? You might need to replace the switch if its not working properly... CITROEN,FIAT - TEMPERATURE SWITCH/RADIATOR FAN

10th December 2010, 17:04

it was like it when i brought it mate
i will replace the switch then mate because thats probly what was wrong

1 thing i was wondering
how does this fan know when the engines hot?

does it (rad switch) sence the water gets warmer so it kicks the fan in?
also is fuse 5 a 10A

10th December 2010, 17:16

Yeah, the saxo one switches on first at ~97°c then back off at ~92°c

10th December 2010, 17:50

ohh i see now
thanks buddy, ill order that switch and replace it and wire it how you said

11th December 2010, 17:45

Quote:

Originally Posted by ashbuster

yeah lol its abit wierd that
i was just wondering mate, with my fan do i wire it into the fuse box inside the car or the one in the engine bay?
sorry for the highjack but was talking about fuses and made me think lol

Engine bay mate

11th December 2010, 17:52

nice one mate

11th December 2010, 18:16

would this go through an mot like this?
because i have the mot tuesday and still waiting for my new switch to be delivered so will have to leave it on manual till then
so would the mot place fail this if so ill cancel and book it in again after its done

11th December 2010, 18:33

Nah it's not a reason to fail it - although for the emissions test they sometimes use "cooling fan cut in" as a method to gauge if the engine is up to operating temperature. Obviously with a manual switch this aint gunna happen so you might need to tell them

11th December 2010, 18:41

yeah mate nice one

hopefully it goes through,
just replaced the tyre that had a ball in it and also replaced the drop links

11th December 2010, 18:51

Where abouts you got it booked in buddy?

I always get an e-mail from Nationwide with this link :

Nationwide Autocentre Motor Mouth Discounts!

Always seems to give me it for £32.91 which im chuffed about, don't like paying the full £55

11th December 2010, 18:59

a garage its just down the road

£40

what grade wire do you suggest?
should this be 8amp mate

15th December 2010, 12:27

all sorted mate
exactly how you said
thanks for that mate