relay for 2leds and scanner

how would i install 2 leds and a scanner with my alarm using a relay? I want them all to blink when the alarm is armed at the same time, but also I want to be able to turn the scanner on and off with a switch.

the scanner has 3 wires: red-12v black-ground blue-alarm trigger LEDs have only 2 wires just like my old red led that came with my Clifford alarm. Originally the varad led came with a small chip with 3 wires coming from it. I had to snip that off in order to just replace that one red led. Is it possible to use the led i have right now or would i have to buy some new ones with that small chip that makes it blink.

yah my alarm has a flashing signal output. That is why i had to cut that chip off. I've tried to hook the 2 leds to it, but then only one of the led's would work. I'm thinking that i would have to use a relay to hook it up or something. This is exactly what i did: I cut off the red led. So there are 2 wires which were connected to the led. I cut off the chip from the flashing blue led. Connected the blue led to the two wires. That works fine just like a regular alarm with one led. I've tried to tap both leds to the 2 wires by just putting 2blacks and 2 reds together and tapping that to the 2 wires that was cut from the original alarm led. That didnt work. Is there a way to like split the signal for the led?..i'm probably doing something wrong anyway. Thanks.

Your LED wire from the Alarm only has enough current to drive 1 LED and wouldn't be able to drive a relay either. The LEDs are typically 2V at 20mA I think this page https://www.the12volt.com/installbay/forum_posts.asp?tid=12465&PN=1 should help you out. Cheers, S.Peugeot 206SW Quiksilver

I still say put the scanner on the negative when armed output, and hook a flashing relay to that as well. Otherwise get a general purpose NPN transistor like a 2N3904 and put a 7K Ohm resistor in series with the output to the base of the transistor, wire the emitter to ground and the collector will then flash a negative signal.