Randall,
Seems you're right about Lucas numbers..
I dug up three Lucas 9H style horns to test directly on my car battery and
their stamped ID numbers seem to be Lucas 'date system' (week/year) followed by
their 'factory number' ie;
I have;
1) 12V 9 66 69158 B - marked H (sounds as soft as my Clear Hooter H)
2) 12V 47 72 69157 D - marked L (sounds as soft as my Clear Hooter L)
3) 12V 50 85 69219 A - marked H (and loud!)
>> I'd guess that 'switch life' is the reason Triumph went back to relays. <<
I could agree with that.. and maybe their weak grounding system..
>> If they don't have to be Lucas, Hella makes some aftermarket horns that are
seriously loud.. Randall <<
..reminds me of the time I put a big ole 1970's GM station-wagon horn unit in
the TR4 .. unfortunately it made my TR4 sound like a big ole 1970's GM
station-wagon!! ugh!
I think TR4-As and TR6s might have a loud enough 'British voice' ..
could someone give me Lucas numbers right off their oe TR4A/6 horns?
Regards,
Carl
'63 TR4 since '74
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