Discovery sport wiper fuse keeps blowing

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OriginalPU5

New Member
Posts
4
Location
Scotland
Have blown 5 fuses as soon as I replace them and turn the wipers on. First time it blew it was fine for 3 days but now every fuse just blows.
The motor seems fine according to the garage for they took the motor out to test it.
Anyone had the same problem or got any idea what keeps blown the 30a fuse in the engine compartment?
 
OriginalPU5 said:
Have blown 5 fuses as soon as I replace them and turn the wipers on. First time it blew it was fine for 3 days but now every fuse just blows.
The motor seems fine according to the garage for they took the motor out to test it.
Anyone had the same problem or got any idea what keeps blown the 30a fuse in the engine compartment?
Click to expand...
 
Am hoping someone might know of a common problem which causes the fuse to blow or a rare problem which causes this.
I can't take the chance that the wipers go again see as a travel over 100 miles to and fro from work for its happened twice already. And breakdown services have said if it happens again within 28 days I am not covered for the same problem. So I really need to find the problem not just find a quick fix
 
OriginalPU5 said:
Am hoping someone might know of a common problem which causes the fuse to blow or a rare problem which causes this.
I can't take the chance that the wipers go again see as a travel over 100 miles to and fro from work for its happened twice already. And breakdown services have said if it happens again within 28 days I am not covered for the same problem. So I really need to find the problem not just find a quick fix
Click to expand...

Back to the garage it goes, or find a local mobile electrician?
 
lynall said:
Back to the garage it goes, or find a local mobile electrician?
Click to expand...
Its still at the garage. He is still testing and looking for the problem. Told him to take his time for I only need the car by the 5th. Hoping to find some helpful info here to give the garage a helping hand on what the problem could be. Tried all the local auto electricians but they could only help next year for were fully booked or winding down for Xmas. And can go further than local for u need the wipers this time of year
 
OriginalPU5 said:
Its still at the garage. He is still testing and looking for the problem. Told him to take his time for I only need the car by the 5th. Hoping to find some helpful info here to give the garage a helping hand on what the problem could be. Tried all the local auto electricians but they could only help next year for were fully booked or winding down for Xmas. And can go further than local for u need the wipers this time of year
Click to expand...

Has the garage or you got access to the wiring diagrams for the car?
Iirc you can sign up to Topix for 24hrs and download as much info as you want in that 24 hrs, so if you can get the garage the wiring diagram?
 
Tried FB?

Screen Shot 2021-12-26 at 08.06.15.png
 
lynall said:
Quick google shows it comes as a complete package, you say they tested the motor, was it connected to the linkage at the time? I ask as I have seen wiper spindles seized nearly solid.

https://midlandcarbreakers.com/prod...t-windscreen-wiper-motor-linkage-fk7217500ba/
Click to expand...
Exactly, but wiper motors are pretty powerful to start with, although its bad if a disco sport has seized wiper spindles or linkage already.
Simples to test just the wiper motor in situ, unplug it a then switch on the wiper if the fuse remains intact the motors iffy, hopefully a fuse with the correct rating is being used, but if the fuse still pops :(
Could have been worse the fuse remained and the motor stared smoking.

Any additional load place on a wiper motor above what it was designed for will/should blow its supply fuse, try it at home with wipers on and a foot of frozen snow on the windscreen… as I did, only the once :)
 
OriginalPU5 said:
The motor seems fine according to the garage for they took the motor out to test it.
Click to expand...

I'd suggest the motor is replaced, as the motor on the FL2 (the DS is basically the same vehicle) can draw excessive current on occasion.

Edit.

Actually, thinking about it. The Freelander 2 has also suffered from wiring shorts on the wiper wiring, where the wiring routes round some other components (I can't remember where exactly, but around the bulkhead area somewhere), so it's entirely possible the DS is similarly affected, being as the vehicles are such close cousins.
 
Last edited:
discool said:
...Simples to test just the wiper motor in situ, unplug it a then switch on the wiper if the fuse remains intact the motors iffy, hopefully a fuse with the correct rating is being used, but if the fuse still pops :(
Click to expand...
If the fuse is blowing straight away, performing the above test will tell you if it's the motor or the wiring causing the fault. Tell your garage to do this test. They should know to do it themselves as a method of process of elimination to fault find it.

On the topic of telling them to take their time... they will likely work on other cars until it's time to work on yours. So may not have looked at yours in much detail.
 
Hippo said:
If the fuse is blowing straight away, performing the above test will tell you if it's the motor or the wiring causing the fault. Tell your garage to do this test. They should know to do it themselves as a method of process of elimination to fault find it.

On the topic of telling them to take their time... they will likely work on other cars until it's time to work on yours. So may not have looked at yours in much detail.
Click to expand...
Hi, unfortunately unplugging the wiper motor will not test the wiring, other than if the fuse still blows but thats not wiring fault finding, unplugging removes just one element that may have an issue. :)

Happy New Year…. to you.:D
 
Last edited:
discool said:
Hi, unfortunately unplugging the wiper motor will not test the wiring, unplugging removes just one element that may have an issue. :)

Happy New Year…. to you.:D
Click to expand...
With the fault being intermittent then getting worse, I'm wondering if the wire is shorted to earth.
 
discool said:
Definitely, at a guess as the switching of the wipers will be controlled by an ECU of sorts I expect.
Diagnostic kit required again ?:(
Click to expand...
I think a lot can be achieved without diagnostic kit, even on modern vehicles. We can work out if it's the wire or motor by disconnecting it. If there's another vehicle of the same type local you can swap over the motor to see if the fault follows the motor. We can measure the wiring to see if volts appear when the motor is removed and the switch closed, to see if the power is active. It's possible the computer may not power the motor if it detects it's not there. Depends how clever it's programming/detection is. The owner still has a reasonable chance of self repair by breaking down the fault, before diagnostics is the only option.
 
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