13 replies to this topic

[Wiggywithahailo]

Was just about to order some online and then thought how much does quality matter?
I have seen some that are ceramic?!
But as they are only a few quid for loads does it matter? Or would a cheaper quality fuse blow easier?

[ChopperHarris]

Should all blow at the stated rating.

Ceramic fuses were just household, and you wouldn't see if it had blown

[Wiggywithahailo]

Should is a good point,just got me thinking
And I'm sure I saw some ceramic tipped car fuses thought it was odd as never seen them before

[Spider]

The Glass Fuses that are generally available these days are pretty much a much for muchness.

 

The Ceramic Fuses are used where the Fault Currnt is quite high. Fault Current is not the current that the fuse will blow at but the Current that can flow when a faul occurs. Fuses can be fast, but none are instant. So in that brief time between when the fault occurs and the fuse blowing is the Fault Current. Also, the higher the Fault Current, the faster the fuse can blow. These curves give some idea of what some fuses will do.

 

 

 

They will (or should!) carry their rated current at 25⁰C indefinitely and many can carry double their rated current for up to 4 and sometimes 8 hours. They are not overload protection devices, but short circuit protection.

[Wiggywithahailo]

Very informative thanks M S
Still doesn't explain why my wipers keep blowing a fuse .....

[Spider]

Very informative thanks M S
Still doesn't explain why my wipers keep blowing a fuse .....

 

Fault in the wiper motor!

 

Seriously though, I've found quite a few times with these, it's actually the Park Switch. The Motor Parks by removing the voltage to the Motor and then Short Circuiting the Motor itself which has the effect of a Brake, so that they don't run on and cycle through again on the Auto-park. When the switches wear, they sometime short the motor before they remove the voltage from it - result - blown fuse!

Edited by Moke Spider, 08 April 2015 - 09:18 AM.

[Wiggywithahailo]

ah so am i right to think that you can open up the motor and replace the park switch?

[Wiggywithahailo]

Just found it on minispares
Thanks MS

[Spider]

Just found it on minispares
Thanks MS

 

Beat me to it;-

 

http://www.minispare...ck to catalogue

 

I'm not saying though that this is the problem, only it maybe the problem.

[Wiggywithahailo]

Thanks have had a brief look at it and it is 25 years old so will investigate ta

[Ethel]

You could remove the park switch from the motor. It'll stop it parking, but if it also stops blowing fuses you'll have a better idea if it's faulty. Stick some tape over the metal spring clip, that's the earth that blows fuses.

[Wiggywithahailo]

Cheers Ethel good info 👍

[rodandtom]

It's an easy repair to make once you have the motor out of the car.

Rod

[Dan]

Ceramic fuses are common to French cars, they are a different size and don't fit the box.