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Fitting New (twin) Horns - Almost There But Not Quite. (1 Viewer)

GeriatricWanderer

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Feb 1, 2015
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On a previous van (T4) I replaced the OE horn with a pair of snail horns. With the guidance of someone more electrically skilled than me, I made up a nice little harness with a relay and fuse and everything worked well.

The T4 has now gone but I kept the new horns and harness to fit onto my latest van.

All very simple apart from one thing I can't sort out:

The OE horn on the T4 had a twin feed wire and I simply unplugged the old horn and ran the 2 wires to terminals 85 and 86 on the new horn relay. The OE horn on my current van only has one feed wire so I'm a bit lost as to how to connect it to the relay.

Do I connect this wire to one of the relay terminals (which one?) and earth the other relay terminal?

If that makes sense to anyone I'd appreciate some guidance - if not then "trial and error" has always worked for me in the past. :)
 

andy63

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Jan 19, 2014
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If its the standard 4 pin relay I think you would wire the existing horn feed to terminal 86..which will switch the relay on ... 85 been coil ground...
Then a power supply for the horn to 30 and a connection to horn via 87.
Ta andy
P's hope that makes sense :)
 

Abacist

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Oct 15, 2013
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Good question!

I've bought some air horns but have not yet got around to fitting them!
 

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