[TR] TR4A Horn Question

[David Friedlander]

Dave;

I assume you've checked the ground wires for each horn....

Dave

On Wed, Jan 27, 2021 at 3:50 PM Dave Connitt <dconnitt at fuse.net> wrote:

> Hi All,
> One of my winter projects is to determine why the horn fuse in my TR4A
> keeps blowing.
> I had installed a Advanced AutoWire harness during the restoration. The
> harness contains a 20 amp fuse for the horn. The horns are new as of the
> restoration. I went through the wiring harness and could not find a issue
> there so now I am looking at the horns themselves and that is where I need
> your help. I measured the horn coil resistance and it is 0.8 ohms in both
> of them. If I use 13.8 VDC as my battery voltage, I get 17.25 amps at the
> fuse which is too close to the 20 amp fuse rating in my opinion. If the
> resistance was even 0.9 ohms, the fuse current would be a little over 15
> amps which would make more sense. Does anyone know what I should see as a
> horn coil resistance on a good horn?
> Thanks in advance,
> Dave Connitt
>
> Sent from my iPhone
> ** triumphs at autox.team.net **
>
> Donate: http://www.team.net/donate.html
> Archive: http://www.team.net/pipermail/triumphs
> http://www.team.net/archive
>
> Unsubscribe/Manage:
> http://autox.team.net/mailman/options/triumphs/forzion7@gmail.com
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://autox.team.net/pipermail/triumphs/attachments/20210127/a730e4c8/attachment.htm>