Shorter horn chirp?

Hi guys, Great site, lots of information and a lot of people willing to help. My question should be simple to find here or somewhere on the inter-web, but I haven't been able to. I followed the dia. on the relay pages to make the horn chirp shorter and used the 1uf cap. but it still seems a little long to me. So im trying to find out what which way to go with the caps. to get the chirp shorter. Is it bigger numbers or smaller? I tried a 470 and it didn't seem a lot shorter. I used a SMD relay, would that make any difference? Thank you for your time, John AJohn B.

Are you meaning a SSR (Solid State Relay)?

It will take a resistor in series and the capacitor across the coil of the relay. Without the resistor you are just extending the pulse. If you are using a smd relay chances are 470 mic is huge.

Thank you for the reply, Yes it looks large. I think I have it as the dia. shows. https://www.the12volt.com/relays/relaydiagram20.html         I think I need to go down in size , like a 330 or 220 is that right? Thanx for the help, John AJohn B.

The resistor needs to be in series not parallel. The voltage going through the resistor will slow down the charging of the capacitor. The relay will not energize until the voltage gets high enough. Leave the capacitor as it is and put the resistor between the alarm and the relay.

Im not understanding? this is what I'm trying to do. So you mean put the resistor were the drawing shows "switched 12 volt" because that is between the alarm and the relay. Thanx for the help, John AJohn B.

Is this an alarm that you are trying to shorten the arm and disarm chirps? If so, the above diagram will only chirp when the alarm is triggered.

My bad, I should have explained what I was working on. Just got my son his first truck and it had an aftermarket keyless entry in it. The horn goes off on lock for about !.5 seconds, way to long for me or the neighbors. It doesn't have a manufacture or part number on the module so can't check with the maker to see if it is programmable, but the remote does have "ICD" on it. Does any one know this company, I don't find anything searching ICD? So that's what we are trying to do , shorten the horn chirp, it does seem shorter but not enough. Thanx again, John AJohn B.

Post a picture of the remote. On the back of it is there an FCC ID number? Have you tried pressing and holding the lock button for a second or so?

No FCC Number and no luck holding a button down either. Im going to use a smaller number cap. and wire the relay like the pictured diagram. I'll post a pic. when I have it made and u can let me know what you think. Thanx, JohnA John B.