MKTR Posted February 1, 2017 Report Share Posted February 1, 2017 Hi All, Apologies for this question and the arrangement of my TR4 car horns. My car has modern replacement car horns linked to a relay. All works fine except for when the car first starts up and there does not seem to be enough juice for the relay to operate. A blip on the accelerator and then it is OK for the journey. My question is whether the horns should work without the ignition switch being on, and/or the engine running? If so I may need to look at the wiring set up. Many thanks. Mark Quote Link to post Share on other sites
RogerH Posted February 1, 2017 Report Share Posted February 1, 2017 Hi Mark, the horns should work through a relay but not the ignition switch. Roger Quote Link to post Share on other sites
stuart Posted February 1, 2017 Report Share Posted February 1, 2017 Hi Mark, the horns should work through a relay but not the ignition switch. Roger TR4 horns didnt have a relay as that was only brought in with the 4a but regardless they should still be permanently live so you may have a poor earth by the sound of it Stuart. Quote Link to post Share on other sites
MKTR Posted February 1, 2017 Author Report Share Posted February 1, 2017 Thanks Stuart & Roger. I will have a nice little job to do then to confirm the wiring set up and check the earths. I have a feeling that the live for the relay may be wired to the back of the ignition switch and so I will take one from the battery. Mark Quote Link to post Share on other sites
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