Ed :
25 amp (American) will work fine for both. The difference is in the rating
system, Lucas vs American. According to an old equivalence chart from Buss,
it actually takes a 35 amp American fuse to replace the Lucas 50 amp that
was specified for the horn fuse on TR2/3/early A. (The factory
recommendation changed around 1960.) However, I've used a 25amp Buss fuse
for my original horns for many years, and never had any trouble with
nuisance blowing.
Randall
Copied long ago from the Jag lover's web site :
Simon S. Johnson sends the following data: "...the source: a
1974 edition of "Buss Fuse Car and Truck List" which has on the
back cover a section call "Foreign Car Fuse Replacement Data," -- foreign
to the US, that is. It states that "English standards differ from US
standards. This accounts for difference in ampere ratings." Then it
provides a list:
English Type Buss Replacement
50 amp AGC 30
35 amp AGC 25
30 amp AGC 20
25 amp AGC 15
20 amp AGC 10
10 amp AGC 7 1/2
5 amp AGC 3
>
> 50 amps (british) for the horns is correct. Haynes mentions 25 amps for
> either. I put the 25's (american?) in both. Is there a significant
> difference.
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