rc time constant for short door pulse

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=128184
Printed Date: May 13, 2025 at 5:51 AM

Topic: rc time constant for short door pulse

Posted By: jaxzin
Subject: rc time constant for short door pulse
Date Posted: August 08, 2011 at 11:51 PM

Hi.

Need help figuring this schematic out. My manual says to use it if my door unlock pulses are too long ( they are about 4 seconds right now ) but I can't figur eout ho wlong this pulse will be. if I use T=R*C then it says 2,914 secs? Is that right?

posted_image

Replies:

Posted By: howie ll
Date Posted: August 09, 2011 at 12:29 AM

Your factory lock/unlock pulses on the motor wires should be 0.8" long.

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Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.

Posted By: jaxzin
Date Posted: August 09, 2011 at 12:35 AM

howie ll wrote:

Your factory lock/unlock pulses on the motor wires should be 0.8" long.

I need to make them shorter since that .5v that shows up on the lock wires when i press unlock.

Just so everyone knows this is on a 2008 mazda3 hatchback.

Posted By: howie ll
Date Posted: August 09, 2011 at 12:37 AM

Forget it, read my answer on your other thread.

-------------
Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.

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