turn-off thump & relay

Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=54456
Printed Date: May 11, 2025 at 2:07 AM

Topic: turn-off thump & relay

Posted By: boulderguy
Subject: turn-off thump & relay
Date Posted: April 22, 2005 at 10:14 PM

I use a standard SPDT relay to turn on 3 amps, a signal processor & two cooling fans thru the headunit's remote. Works great, but there's a small turn-off thump. Any tricks to fix that? Maybe a diode or two relays?

Replies:

Posted By: slammedb5
Date Posted: April 23, 2005 at 4:06 AM

Maybe the HU cuts power to it's accessories after power is cut to the car. Are you using the blue/white wire from the deck? Try finding an in car substitute for power to your relays, like from the car's ignition harness, and see if that solves the problem.

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EK Civic
security
no audio

Posted By: geepherder
Date Posted: April 23, 2005 at 7:55 AM

Exactly. If that doesn't work: https://www.crutchfield.com/S-tftBol3nOTa/tech/kb327.html

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My ex once told me I have a perfect face for radio.

Posted By: supradude
Date Posted: April 23, 2005 at 10:39 AM

You can contact dnavone@davidnavone.com. He has part # N-68 (turn off delay) that will do the trick.

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'85 Toy

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