/en/qa/tag/07 Powered by Question2Answer /en/qa/71475/evo-one-e1-siren-install How would I hook up my siren? It states pin E1 can be used as a + output option 1, or should I use the - horn output and choose option 4. Also, if using E1 does it reqiure a relay between it and the siren? Acura /en/qa/71475/evo-one-e1-siren-install Sat, 23 Jul 2016 18:35:18 +0000