|
||
|
9th June 2011, 10:14 | #1 |
Give to Learn
Freelander 2 Join Date: Aug 2010
Location: West Midlands
Posts: 18,717
Thanks: 1,155
Thanked 6,407 Times in 3,874 Posts
|
Fan Silver Resistor. Help Needed
Hi
Some of you may know i have checked my fan and found that it does not work on the low speed and that i have the old 3 speed fan. I have now managed to secure a 2 speed fan with silver resistor, what is now my next step apart from fitting it, should i change the resistor to the upgrade gold one, also do i need or can i test this fan without fitting first. Photos of said item below. Note how the resistor is hidden behind the fan. Note wire that have been cut would i need to join or replace these in any way. close up of the wires close up of resistor behind the fan in this pic you can see that a Green/Yellow wire as been cut very close, also a Green ? and a thicker brown wire ? Do i also have to adapt these fixing hole to help fit the new fan more easly. Any help from members whom have done this mod would be so appreciated. Arctic.
__________________
Arctic Givology Learn to Give Everything is Achievable ad altiora tendo. Check out our Nano meet dates http://www.midlandsnanomeets.co.uk/ http://www.the75andztclub.co.uk/index.php?thepage=howto " You do the work , we supply the expertise " Last edited by Arctic; 9th June 2011 at 13:31.. |
9th June 2011, 11:16 | #2 |
This is my second home
Rover75 and Mreg Corsa. Join Date: Nov 2006
Location: Sumweer onat mote o'dust (Sagin)
Posts: 21,753
Thanks: 341
Thanked 3,660 Times in 2,924 Posts
|
Putting 12volts across the two wires going into the motor should cause it to run. It almost certainly will, so extreme caution advised. The whole thing will fly off like a helicopter if not held down in a vice, etc.
The silver resistor is the OEM one and has/will probably fail. This should be cut out and replaced with a 100watt 0.5-1.0 ohm one. This will provide the low speed. They get blistering hot and should be fixed to the bracket on the framework so it gets cooled in the draft.. |
9th June 2011, 12:06 | #3 |
Give to Learn
Freelander 2 Join Date: Aug 2010
Location: West Midlands
Posts: 18,717
Thanks: 1,155
Thanked 6,407 Times in 3,874 Posts
|
HI T-Cut
This must be the one i am after them right i think i also need to cut round oval to make fan fit easy http://tinyurl.com/6xotkb4
__________________
Arctic Givology Learn to Give Everything is Achievable ad altiora tendo. Check out our Nano meet dates http://www.midlandsnanomeets.co.uk/ http://www.the75andztclub.co.uk/index.php?thepage=howto " You do the work , we supply the expertise " |
9th June 2011, 13:15 | #4 |
Avid contributor
Rover 75 1.8T Connoisseur SE Join Date: Feb 2010
Location: Reading
Posts: 134
Thanks: 0
Thanked 2 Times in 2 Posts
|
As TC says the motor should run with 12V applied, it will take may amps so use thick cables, e.g. jump leads and if you go through a fuse, make sure its a big one. And hold the thing securely to prevent injuries!
Chuck out the old resistor and get a new one from Jules. The link posted is from elsewhere but the Jules one has correct holes drilled & wires fitted and I think its cheaper - plus he's a member on here so please support him! Also mount in the proper place on the bracket in the airflow. Loads of info on here about this. If you don't want to disconnect & de-gas aircon pipes, you must cut away more plastic from both top and bottom holes so you can slide the fan shroud into place. Not sure about wiring from control box, the diesel is quite different from petrol. I believe its expecting to drive a 3-speed fan so you need to wire it up so that both low & medium outputs will make the new 2-speed fan run on low. Again there is info for this here if you search! |
9th June 2011, 13:20 | #5 |
Give to Learn
Freelander 2 Join Date: Aug 2010
Location: West Midlands
Posts: 18,717
Thanks: 1,155
Thanked 6,407 Times in 3,874 Posts
|
HI Andyv.
I have been in touch with jules but he has been away i am waiting on him to get intouch about weather i should use this or if it would have been better to get a kenlowe, am hoping this is ok to use finger crossed. Which wire do i use to join the 12volts to i have a spare battery in the shed will this surfice
__________________
Arctic Givology Learn to Give Everything is Achievable ad altiora tendo. Check out our Nano meet dates http://www.midlandsnanomeets.co.uk/ http://www.the75andztclub.co.uk/index.php?thepage=howto " You do the work , we supply the expertise " Last edited by Arctic; 9th June 2011 at 13:55.. |
9th June 2011, 14:43 | #6 |
Avid contributor
Rover 75 1.8T Connoisseur SE Join Date: Feb 2010
Location: Reading
Posts: 134
Thanks: 0
Thanked 2 Times in 2 Posts
|
Well, a new motor is always going to be better than a rusty used one, but at a cost! If your old motor runs OK, I would use that with a new resistor.
Trace the red and black wires that go to the motor itself to apply 12V across them. One goes to a relay inside the control box, the other to one of the plugs. If you have a multimeter, you can check the continuity first. Using a spare battery is always preferable to one installed in a car! |
9th June 2011, 16:00 | #7 |
Give to Learn
Freelander 2 Join Date: Aug 2010
Location: West Midlands
Posts: 18,717
Thanks: 1,155
Thanked 6,407 Times in 3,874 Posts
|
I have only just got this fan to replace my 3 speed, also i have yet to test it while off the car am at moment charging a spare battery to do this but need to find which wires i use this is what is inside the black box.
Black & Red wire to motor Red to a Brown which goes no where ? then we have this spaghetti Where do i start as you can see two black wires are not in use and have been cut also the little thin wires Green/Yellow and thin green Do i need to hook up the red and black coming from the motor to the battery terminals ?
__________________
Arctic Givology Learn to Give Everything is Achievable ad altiora tendo. Check out our Nano meet dates http://www.midlandsnanomeets.co.uk/ http://www.the75andztclub.co.uk/index.php?thepage=howto " You do the work , we supply the expertise " |
9th June 2011, 16:53 | #8 |
This is my second home
Rover75 and Mreg Corsa. Join Date: Nov 2006
Location: Sumweer onat mote o'dust (Sagin)
Posts: 21,753
Thanks: 341
Thanked 3,660 Times in 2,924 Posts
|
Yes, red to 12v positive, black to earth will get it airborne.
TC |
9th June 2011, 16:59 | #9 |
Give to Learn
Freelander 2 Join Date: Aug 2010
Location: West Midlands
Posts: 18,717
Thanks: 1,155
Thanked 6,407 Times in 3,874 Posts
|
Hi T-cut
i get that but if you look at all the wires red goes to brown goes no were, so join this to + on battery, black wire going into a fork split then on to red in box then also to the resistor.which then in turn goes into the box to the gray wire
__________________
Arctic Givology Learn to Give Everything is Achievable ad altiora tendo. Check out our Nano meet dates http://www.midlandsnanomeets.co.uk/ http://www.the75andztclub.co.uk/index.php?thepage=howto " You do the work , we supply the expertise " |
9th June 2011, 17:16 | #10 |
Avid contributor
Rover 75 1.8T Connoisseur SE Join Date: Feb 2010
Location: Reading
Posts: 134
Thanks: 0
Thanked 2 Times in 2 Posts
|
Its a shame the control box was cut off from the 2 plugs, its clearer if they are there as well.
Red from motor goes to brown which goes straight to 1 of the plugs then to permanent LIVE +12V. NOT via control box. Black is switched to earth by the control box when full Fast Speed is needed, this will go to -ve on your test battery. Additionally, Black is connected to the resistor. The other end of this resistor is then earthed by the control box when Slow Speed is required. The resistor drops the voltage so the fan the operates at, say, 6V instead of 12 to run slower. So it is possible to also test the resistor and slow running with your test battery. Don't put 12V anywhere near the control box for the motor test, you might blow something in it! Suggest unplugging the wires you are testing from the box as well. |
|
|