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16th August 2022, 18:25 | #1 |
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Cooling Fan Relay Box Cover
Hello. The cooling fan on my R75 Diesel Estate 2004 is staying on. From my research it seems like the relay is stuck on, so... I have removed the bumper and the horn and I can see what I think is the relay cover but I can't work out how it comes off.
Does it just pull straight off forwards or is there some other jiggery pokery required? Many Thanks, Steve |
16th August 2022, 21:19 | #2 | ||
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When you say it's staying on do you mean after you have turned the ignition off, or just when the car is running? Also have you looked to see if you have a silver resistor at about 2 Oclock, if so this could be the fault, and needs changing for a gold one. 1 2 To look at the relay's you would need to remove the alloy crash bar, four bolts either side and one nut either side, always best to remove the slam panel in my opinion, but you could try below. 3 4 Once the crash bar is off you can then remove the cooler assembly pipe for the power steering, tow 10mm bolts, first crack the 8mm bolts holding the temp sensor, and remove. 5 Then the two 10mm bolts for the cooler pipe. 6 7 Lay the pipe down on the ground. Then undo and remove the four 8mm bolts hold the fan to the car, this may just about give you room to pp out the control box it will be tight. 8 9 Now the two holding the fan to the intercooler. 10 11 Even after all this work it will be hard to remove the relays, and you could damage the PCB which could also be the problem. So it would be best to get the fan on a bench after a few tests have been completed, that means removing the slam panel with light attached. 12
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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; 16th August 2022 at 21:23.. |
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17th August 2022, 07:18 | #3 | |
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17th August 2022, 07:22 | #4 |
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A very recent Danish post of the fan always on turned out to be a break in the sensor wiring (very active mouse) causing the EMU to activate the fan in emergency mode as it was not receiving an active signal from the sensor.
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17th August 2022, 17:32 | #5 |
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Thanks all for getting back to me so soon.
The fan runs continuously after turning off and removing the key. I had to remove the big fuse in the fusebox near the battery to stop it. It has a silver resistor just behind the fan. |
17th August 2022, 20:59 | #6 | |
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[QUOTE]
Quote:
Hi Steve. It could be the silver resistor is shorting, if they fail the fan would not run most of the times, then it could be the PCB in the control box, i'm afraid it's a fan off the car job to investigate, if you could hold out until our next Nano meet in September we could help you take a look at it at the meet. If not then it's bumper off, slam panel off with crash bar and lights attached, then fan off to give it a good visual look over for any wiring chaffing etc.
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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 " |
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17th August 2022, 21:49 | #7 |
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Steve, on the 2sp resistor fans I've tested I believe that when the resistor burns out it leaves the fan with only one speed (high?), or have the owners just been lucky? I should perhaps mention I've only ever tested a diesel once, all others have been petrol models.
Question for the OP. Does the temperature gauge register at all? Keep well, Mike |
17th August 2022, 23:23 | #8 | ||
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yes you are correct i should have been more clear when i said (if they fail the fan would not run most of the times,) in that it would not run in low speed. If it's running al the time something like a short or PCB trouble could well be the problem, that's why i suggest to remove the fan from the car completely to investigate relays and al wires.
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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 " |
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18th August 2022, 07:54 | #9 | |
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18th August 2022, 08:19 | #10 | |
I really should get out more.......
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