peanut
Active member
came across this excellent article (pdf) on how relays work and how to test them etc. it even gives an example how all car horns work . Surprising how may owners assume that there is a direct wired link between their car's horn-push and the car's horns ![
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http://www.google.co.uk/url?sa=t&source=web&cd=6&sqi=2&ved=0CEIQFjAF&url=http%3A%2F%2Fwww.autoshop101.com%2Fforms%2Fhweb2.pdf&rct=j&q=relay%20coil%20resistance&ei=UdW_TcmiF-HZ4wapobn1BA&usg=AFQjCNED-mGD2IeS69xCcVbWXgugfm9XUA&sig2=qmg22smbn9cz11gnKdoexA&cad=rja
http://www.google.co.uk/url?sa=t&source=web&cd=6&sqi=2&ved=0CEIQFjAF&url=http%3A%2F%2Fwww.autoshop101.com%2Fforms%2Fhweb2.pdf&rct=j&q=relay%20coil%20resistance&ei=UdW_TcmiF-HZ4wapobn1BA&usg=AFQjCNED-mGD2IeS69xCcVbWXgugfm9XUA&sig2=qmg22smbn9cz11gnKdoexA&cad=rja