buzzing relay powered by radio power ante
Printed From: the12volt.com
Forum Name: Car Security and Convenience
Forum Discription: Car Alarms, Keyless Entries, Remote Starters, Immobilizer Bypasses, Sensors, Door Locks, Window Modules, Heated Mirrors, Heated Seats, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=40709
Printed Date: May 09, 2024 at 3:28 AM
Topic: buzzing relay powered by radio power ante
Posted By: vancouverbc
Subject: buzzing relay powered by radio power ante
Date Posted: October 11, 2004 at 8:54 PM
If i turn the ignition on first , I have no problem but if i turn the radio on first the power from radio does not seem to be enough to close relay as relay buzzes. Is this supposed to work this way? ------------- 1991 240sx
alarm=model 2620.web central door locking system
Replies:
Posted By: mo12v
Date Posted: October 11, 2004 at 9:57 PM
In your picture, Is your Amp / Power ant lead turning ON the Relays? Or R U trying to supply Power to Amp / Power Ant lead?
------------- MO
Don't Learn from Others Mistakes
You Might Be the One That Knows.
Posted By: vancouverbc
Date Posted: October 11, 2004 at 11:48 PM
The power antenna supplies power to close relay. The car will not start unless the radio is on.
-------------
1991 240sx
alarm=model 2620.web central door locking system
Posted By: mo12v
Date Posted: October 12, 2004 at 8:40 AM
R U sure you are NOT loosing voltage when U crank (Start) vehicle at the Amp / Power Ant lead & / or the Ignition wire
-------------
MO
Don't Learn from Others Mistakes
You Might Be the One That Knows.
Posted By: vancouverbc
Date Posted: October 12, 2004 at 1:26 PM
It only buzzes when the ignition is off and the radio is on. Once the ignition is on and delivers 12v to terminal 30, the relay closes and stays closed until ignition is turned off. Starting the car is no problem.
-------------
1991 240sx
alarm=model 2620.web central door locking system
Posted By: kgerry
Date Posted: October 12, 2004 at 2:23 PM
i would leave pin 85 of the first relay as it is, but hook up 87 and 85 of starter kill relay to 12 volts..... that way p ant activates the relay which then uses 12 volts to energize things..... keep in mind the p ant out is only about 100 ma..... ------------- Kevin Gerry
Certified Electronics Technician
MECP First Class Installer
Owner/Installer
Classic Car Audio
since 1979
Posted By: mo12v
Date Posted: October 12, 2004 at 3:03 PM
It appears U may be getting a low voltage from your Amp/Power Ant Lead.
Have U checked voltage with key off
I can duplicate Relay buzz as U have it wired using Audiovox on test bench ------------- MO
Don't Learn from Others Mistakes
You Might Be the One That Knows.
Posted By: paulyvee
Date Posted: October 12, 2004 at 6:28 PM
Two things I can think would cause probs. a) low volts from the aerial output of the radio or excessive volts drop across the series diode, AS the circuit is drawn I can.t see a need for the diode. If it is needed to isolate from another circuit check its rating. Low cuttent diodes - aka 1n4148 = 50v iA diode tend to have a comparatively high internal resistance if only handling 100 - 200 mA relay current. Try putting in a dummy load in parallel with the relay to force more diode current or use a schottky diode with a lower internal resistance. b) is there any interaction caused by the ignition feed to the radio not being active until the ignition is live. Disconnect the relays and see if the radio performance varies with the ignition on or off. Also check if there is a power aerial fitted requiring the ignition to be on to be fully operational causing additional loading on the radio aerial feed wire.
Posted By: vancouverbc
Date Posted: October 13, 2004 at 1:58 AM
Thanks for the great ideas. I went out to car in dark and measured a consistent 9.85 volts on the power antenna lead. It was 9.85 with and without the radio on and with two different grounds. I have installed an ad hoc remote window control and keyless entry so i may of inadvertently created a voltage drop somewhere.
-------------
1991 240sx
alarm=model 2620.web central door locking system
|