intermanxnorton Posted October 20, 2018 Share Posted October 20, 2018 Hi Guysanyone replaced their horns for a louder pair? I have purchased a pair, but they have a relay. My question will I need it? Surely the oe set has a relay already in the wiring? Any help on wiring these up would be appreciated. ThanksRegards Phil Link to comment Share on other sites More sharing options...
SM25T Posted October 20, 2018 Share Posted October 20, 2018 Triple airhorns with compressor for me. I fitted an extra relay as it draws a fair current. Just check polarity as I recall horn maybe switches the earth (-ve) side ? The horn button is used to energise the relay ... which switches the supply from the battery (fused) to the horns. Link to comment Share on other sites More sharing options...
7 wonders of the world Posted October 20, 2018 Share Posted October 20, 2018 or these https://www.amazon.co.uk/Stebel-NAUTILUS-BLACK-12V-Horn/dp/B003ET0JJQ/ref=pd_lpo_sbs_263_t_1?_encoding=UTF8&psc=1&refRID=1TY2AECST2PVWAR18KREyou can also get copies of this version on fleabay for half price...... Link to comment Share on other sites More sharing options...
Area Representative Golf Juliet Tango Posted October 20, 2018 Area Representative Share Posted October 20, 2018 I use a Nautilus as linked to above, but not used it in anger. Link to comment Share on other sites More sharing options...
Molecular--Bob Posted October 21, 2018 Share Posted October 21, 2018 Another vote for the Stebel here. Mine is on an added relay. I think there is an air horn relay already in the fuse block(my loom is crossflow)? I think there are short wires already in the loom as well terminated under the scuttle but not connected, but I didn't want to take it apart to find the wires.Edit to add that on a crossflow loom there is a single horn relay that runs the standard horns on thinish wire, but the same relay has short heavier gauge wires that need to be extended if you wish to run the optional air horns, this circuit is fused at 20amps. Link to comment Share on other sites More sharing options...
Member Jonathan Kay Posted October 21, 2018 Member Share Posted October 21, 2018 Surely the oe set has a relay already in the wiring?Let me know if you'd like the wiring diagram for Sigma cars.Shirley Link to comment Share on other sites More sharing options...
DJ. Posted October 21, 2018 Share Posted October 21, 2018 I fitted PIAA sports horns. Lighter than the original horns, much louder and no need for a relay.Duncan Link to comment Share on other sites More sharing options...
Roadsport06 Posted October 21, 2018 Share Posted October 21, 2018 Same as DJ here. Straight swap and very loud Link to comment Share on other sites More sharing options...
John Vine Posted October 21, 2018 Share Posted October 21, 2018 I fitted PIAA sports horns.Or if you're looking for a cheapo Chinese copy, you could look for these (assuming they're still available somewhere). At £8.80 (yes, really!), they're practically consumables. I fitted a pair a year ago, and they work very well, with a LOUD hi-lo duotone. They're a direct replacement for the standard CC ones (although you'll need to add an earth connection).JV Link to comment Share on other sites More sharing options...
John Vine Posted October 21, 2018 Share Posted October 21, 2018 Surely the oe set has a relay already in the wiring?The standard horns don't have a relay. The need for one would depend on the wattage of the replacements. JV Link to comment Share on other sites More sharing options...
elie boone Posted October 22, 2018 Share Posted October 22, 2018 I fitted air horns, but in real Lotus tradition i only use one to safe weight Link to comment Share on other sites More sharing options...
Member Jonathan Kay Posted October 22, 2018 Member Share Posted October 22, 2018 :-)And in a previous discussion we tried to identify a solid-state siren but failed.JonathanPS "...to save". :-) Link to comment Share on other sites More sharing options...
Member Jonathan Kay Posted October 22, 2018 Member Share Posted October 22, 2018 There a few electrical points scattered around above: switched earth/ switched feed, current requirements and the need for a relay, existing wiring...It's possible to add just about any kind of car horn to a Seven without too much effort and the wiring shouldn't put anyone off.JonathanPS: Of course a gentleman's car has town and country horns. :-) Link to comment Share on other sites More sharing options...
elie boone Posted October 22, 2018 Share Posted October 22, 2018 OK i get it, as in better save than sorry Link to comment Share on other sites More sharing options...
chrisr1718 Posted October 24, 2018 Share Posted October 24, 2018 JV, These look the same... £12.99 Link to comment Share on other sites More sharing options...
John Vine Posted October 25, 2018 Share Posted October 25, 2018 They do indeed.JV Link to comment Share on other sites More sharing options...
RogerB Posted December 10, 2018 Share Posted December 10, 2018 Jonathon,I don't suppose you have a wiring diagram for a K series engined car.Roger. Link to comment Share on other sites More sharing options...
Member Jonathan Kay Posted December 10, 2018 Member Share Posted December 10, 2018 Private Message sent.Jonathan Link to comment Share on other sites More sharing options...
Edzup Ezzer Posted December 11, 2018 Share Posted December 11, 2018 FWIW I fitted a Stebel Nautilus to my Seven years ago and I am slightly reluctant to use it because people give you a dirty look as it makes them jump, but that is kind of the point isn't it. So I have to say it does what it's meant to do. It gets their attention! Installation is straightforward. Bolted on in place of the original horn with a relay triggered by the original horn feed, switching a feed taken off the battery with an inline fuse fitted very near the battery. Link to comment Share on other sites More sharing options...
john milner Posted December 11, 2018 Share Posted December 11, 2018 These also look the same and only £6.46. One reviewer claims they are louder than standard Mercedes C class horns:https://www.amazon.co.uk/flexzon-Universal-Electromagnetic-snail-klaxon/dp/B00LMBOWD2/ref=cm_cr_arp_d_product_top?ie=UTF8 Link to comment Share on other sites More sharing options...
Nigel Riches Posted December 19, 2018 Share Posted December 19, 2018 Just remember that if you use an air horn fit out, the compressor would benefit from a drop of air tool oil every once in a while, to make the compressed air leave via the horns, not just swish around in the compressor housing. Nigel. Link to comment Share on other sites More sharing options...
john milner Posted December 21, 2018 Share Posted December 21, 2018 I bought the set I mentioned in post #20. They are probably no better than the standard horns and might even be worse. Look good though. I tested them first off the car and they sounded quite loud but once fitted in the bay sounded a bit muffed. I reverted to my CBS set and managed to find a better location in front of the steering rack. The CBS set are quite heavy and bulky and I always felt they were at risk of becoming detached and hitting the alternator belt but shifting them a few inches forward has reduced this risk by quite a bit.https://www.carbuildersolutions.com/uk/twin-tone-electric-horns-chrome Link to comment Share on other sites More sharing options...
DJ. Posted December 21, 2018 Share Posted December 21, 2018 If you spend enough to get proper PIAA Sports Horns they are lighter than the Caterham ones and VERY loud. Link to comment Share on other sites More sharing options...
Ian B Posted December 22, 2018 Share Posted December 22, 2018 Nautilus and loud Link to comment Share on other sites More sharing options...
Martin J Posted December 24, 2018 Share Posted December 24, 2018 toot toot Link to comment Share on other sites More sharing options...
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