rad fan - Page 2

grossebaby · 2nd August 2008, 01:02

I know a guy in Halifax who needs his fan removing and refitting, sounds like you are super fast!

stocktake · 3rd August 2008, 05:12

When you have the bumper off disconnect the wiring. On the two plugs that go to the fan you will see two thick wires. If you connect these up to a battery and the fan starts, then you know you have a faulty relay.

Edit..... see below...

HTH

I'm in Leeds if you need a hand

Jules · 3rd August 2008, 21:29

NO NO NO!!!
You'll get away with testing a petrol fan control box like that but, not a diesel box.
The speed is controlled by a PWM waveform (pulse width modulation) on the thin wires of the fan harness.

If you put voltage up these, you are likely to fry the PCB inside the fan relay control box.
Read here for the info :

See the differences in picture No 3 Diesel& pic no 6 Petrol control boxes
http://www.the75andztclub.co.uk/foru...75&postcount=7

stocktake · 3rd August 2008, 21:35

Oh Begger, sorry to all will amend post, stupid petrol head, must learn to read posts.......plonker

Jules, thanks for info , in your debt again

JohnDotCom · 3rd August 2008, 21:41

It happens to us all Dave.
But someone will generally spot and advise.

Nice Catch Jules.

Jules · 3rd August 2008, 21:43

That's quite OK didn't mean to be rude, just spread the word about the different control boxes

Oh BTW some of those tests can be done without taking the front off !

ie scramble behind the front passenger side wheel arch liner and there are the 2 large multi plugs.

3rd August 2008, 05:12	#12
stocktake Vis Whiz Rover 75 2.5 auto Saloon Join Date: Jun 2007 Location: LEEDS Posts: 20,591 Thanks: 2,057 Thanked 3,056 Times in 1,621 Posts	When you have the bumper off disconnect the wiring. On the two plugs that go to the fan you will see two thick wires. If you connect these up to a battery and the fan starts, then you know you have a faulty relay. Edit..... see below... HTH I'm in Leeds if you need a hand __________________ Dave... Lost a few stones and a Gall Bladder and part of a bile duct and all of my dignity in the suppository incident Last edited by stocktake; 4th August 2008 at 06:58..

3rd August 2008, 21:29	#13
Jules This is my second home ZT 260 SE Twilight and 10 other 75 ZT's :O Join Date: Jan 2007 Location: Conwy NORTH WALES Posts: 11,094 Thanks: 512 Thanked 1,116 Times in 763 Posts	NO NO NO!!! You'll get away with testing a petrol fan control box like that but, not a diesel box. The speed is controlled by a PWM waveform (pulse width modulation) on the thin wires of the fan harness. If you put voltage up these, you are likely to fry the PCB inside the fan relay control box. Read here for the info : See the differences in picture No 3 Diesel& pic no 6 Petrol control boxes http://www.the75andztclub.co.uk/foru...75&postcount=7 __________________ [SIGPIC][/SIGPIC] Newbies do now!! 1. Plenum drains..all 3 or 4 year dependent 2. Cooling fan..All speeds functioning 3. Bonnet cable divider block Last edited by Jules; 3rd August 2008 at 21:37..

3rd August 2008, 21:35	#14
stocktake Vis Whiz Rover 75 2.5 auto Saloon Join Date: Jun 2007 Location: LEEDS Posts: 20,591 Thanks: 2,057 Thanked 3,056 Times in 1,621 Posts	Oh Begger, sorry to all will amend post, stupid petrol head, must learn to read posts.......plonker Jules, thanks for info , in your debt again __________________ Dave... Lost a few stones and a Gall Bladder and part of a bile duct and all of my dignity in the suppository incident Last edited by stocktake; 3rd August 2008 at 21:38..

3rd August 2008, 21:43	#16
Jules This is my second home ZT 260 SE Twilight and 10 other 75 ZT's :O Join Date: Jan 2007 Location: Conwy NORTH WALES Posts: 11,094 Thanks: 512 Thanked 1,116 Times in 763 Posts	That's quite OK didn't mean to be rude, just spread the word about the different control boxes Oh BTW some of those tests can be done without taking the front off ! ie scramble behind the front passenger side wheel arch liner and there are the 2 large multi plugs. __________________ [SIGPIC][/SIGPIC] Newbies do now!! 1. Plenum drains..all 3 or 4 year dependent 2. Cooling fan..All speeds functioning 3. Bonnet cable divider block

2nd August 2008, 01:02	#11
grossebaby Gets stuck in SUBARU LEGACY DIESEL Join Date: Sep 2007 Location: Halifax Posts: 508 Thanks: 0 Thanked 0 Times in 0 Posts	I know a guy in Halifax who needs his fan removing and refitting, sounds like you are super fast!

3rd August 2008, 21:41	#15
JohnDotCom * Rover 75 FaceLift Tourer CDTi 170BHP Auto ConnSE 2005 Model Starlight Silver Join Date: Nov 2006 Location: Abergele Posts: 28,735 Thanks: 0 Thanked 6 Times in 5 Posts	It happens to us all Dave. But someone will generally spot and advise. Nice Catch Jules.