B

bakers

Member

• Sep 30, 2013

• #1

Hi,

Recently fitted a new 'Ring' dual horn, activated from the original horn through a relay.

Horn works fine at stand still and on tick over, however after driving for around 1/2 mile the fuse on the supply to the relay blows!

There must be a surge which is blowing the fuse, I have wired to the feed to the fuse box and also directly to the battery, same result.

Any ideas?

Steve

 

SteNova

Well-Known Member

• Sep 30, 2013

• #2

Does it blow even if you don't use the horn?

 

123-eddy09

Active Member

• Sep 30, 2013

• #3

Does the fuse blow when operating the horn or just on its own?

 

Kwakerman

Well-Known Member

• Sep 30, 2013

• #4

Most horns have a permanent 12v supply and it is the earth wire that is switched to sound the horn. You probably have a chaffed supply wire that is shorting to the chassis through vibration while driving, this will cause fuse to blow.

 

B

bakers

Member

• Sep 30, 2013

• #5

It blows the fuse even if I don't use (operate) it

 

timtheenchanteruk

Well-Known Member

• Oct 1, 2013

• #6

Kwakerman said:

Most horns have a permanent 12v supply and it is the earth wire that is switched to sound the horn. You probably have a chaffed supply wire that is shorting to the chassis through vibration while driving, this will cause fuse to blow.

Click to expand...

+1 the switch on the horn switches the earth.

 

G

goldypurple

Active Member

• Oct 1, 2013

• #7

Fuse is shorting out along the line somewhere, check all wiring for any nics that could be touching any metal of the vehicle.