Horn connect to siren

You would need a relay to do it safely, assuming the OEM horn is not using a relay in the circuit. You would also need to know the polarity of the OEM horn. If it is the opposite, then you simply need to add a relay to convert the polarity. Positive (+) to (-) output 86 & 87 = Ground 85 = (+) Positive trigger to be changed to a (-) 30 = (-) Negative output Negative (-) to (+) output 86 & 87 to Fused 12 volts 85 = (-) Negative trigger to be changed to a (+) 30 = (+) Positive output Regards EVIL Teken . . .

To increase the alarms positive output current ability wire, *add in* the appropiate relay of your choice, and wire it like this. 87 = Fused +12 VDC constant 86 = Ground (-) 85 = Positive siren output from alarm system. 30 = Connect to (+) the horn / siren together. Regards EVIL Teken . . .

Where can i buy them relays? Sorry for the stupid questions. Also, My car is an Acura 3.2 TL '00.

Buy the relays on line or at any automotive store. Your horn is the green / light blue wire and can be found at the steering wheel harness. It is also (-) negative switching. Regards EVIL Teken . . .

So i would follow the

Negative (-) to (+) output

86 & 87 to Fused 12 volts ( 12V from alarm? )85 = (-) Negative trigger to be changed to a (+)  ( Neg. Horn Wire )30 = (+) Positive output   ( of Siren? )