The fuse in the horn circuit on my 73 tr6 keep burning. There is no
short circuit anywhere, and it's only if I keep holding down the horn
switch, it is burns. Actually it takes a little while. The wiring in
my car is sort of old, and I think some of them are suffering from a
meltdown sometime in the past before I bought the car.
The problem arised, when I was trying to find out, why there is almost
no sound coming from the horn. It turned out, the output from the horn
relay to the horn itself is only 8 volts even though the input is 12
volts. Somehow I'm loosing about 4 volts in the relay. The relay could
be faulty, but I replaced it last year, and I don't use the horn that
much. I disconnected the wires from the horn to the relay, just to
test the relay, and this was when I burned the fuse. I can hear the
clicking noise from the relay, when it switches from open to closed.
The fuse I'm using is a 30 amp fuse, and if I remember right, the
formula for calculating amps is : volt = amp * resistance. The voltage
in the circuit is 12 volts, and as mentioned the fuse is a 30 amp
fuse. In order to lower the amp in the circuit I suppose I have to
increase the resistance.
Could someone please explain to me what's going on here.
Thanks,
Dane
|