I was also having intermittent horn issues with the horn beeping on
acceleration from a stop. After taking everything apart, I found a faulty
horn relay to be the culprit. The old Lucas relay had 5 terminals and the
new Lucas part has only 4. On the old relay is a wire to C4 and a sticker
on the old relay says IMPORTANT: IGN COIL TO C4. Both the Masters book and
Bentley make no mention of this wire. I have it capped temporarily and the
horn works and the car runs great. Anyone know the purpose of this wire and
can I live without it?
John Cohen
Rutland, VT
76 TR6
http://www.triumphowners.com/701
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