Car Alarm: LED Flashes to beat of stereo

Well I was meaning, maybe you did this. Pull the fuse, put the fuse back in, the moment you put it in does the LED flash? Maybe the alarm control unit is seeing a low voltage and "turning off" the logic, therefore everytime the voltage drop ends (end of beat impulse) the LED flashes as if the power was re-applied.

Chad

Yes, the LED flashes immediately after I power-on the alarm.

Any idea which fuse it would be? As I didn't do the install myself I don't know which fuse it's linked to.

Sorry, Can't help you with that one.

Chad

It's voltage induction. the poster who said "that's unlikely" has no clue. Every time the bass hits, the induction is just enough to flash the led. Re-routing the led wire or speaker wire will solve the issue.

Try disconnecting that mounted led at the controller, and hooking up another led at the controller without running the wiring near any other wiring. Doesn't do it anymore, does it?

Bullshit, unless the has both of them wrapped around a ferrite, the LED has WAY too low of an impedance and WAY too high of a forward turn on voltage to even see it.

IF it were happening from induction. The LED would only flash at PEAK of ONE EDGE of the WAVEFORM impulse and would have to have a LC CIRCUIT to hold it on to be visible remember it's a damn diode. Wanna do some math? I have wiring all over coming out of amps WAY more powerful than a car amp and have never had induction problems in such confines. Running a 70.7V constant voltage line along a high impedance mic cable for 100' MAY cause induction problems but an LED wire in a dash, get real. It's car audio not broadcast.

5 bucks says it does. Must be the same brand of LED or with very similar characteristics. I'll Paypal you.

Chad

Just an update to everyone. I did end up leaving the LED/Alarm alone as some of have suggested. The strobe effect of the LED is caused by the radio/bass vibration affecting the two stage shock sensor. This is normal :-)