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General question about evo one . Horn out put is a neg trigger. I have a siren that has a pos and neg wires .

The evo one has a neg output for siren or horn no relay is needed the question is the siren has a neg wire to chassis ground and pos wire to 12 volt . Can it be wired up like this. Siren pos to 12 volt and neg chassis ground to neg trigger on the evo one . Is this possible or will that wiring burn up the evo one. Or should i use a relay to change the ouput to a pos trigger and power it through a relay with the evo one neg trigger

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Evo one siren relay needed or only for a factory horn a relay is needed

Does the evo one require a relay for a siren output or does this unit has a on board relay for that option.Or just like a factory horn hook up you need a external relay becuase it is to much power being drawn on the circuit.

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