double diode safety

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markcars

Silver - Posts: 662

Joined: December 11, 2002

Location: New York, United States

Posted: March 07, 2004 at 7:08 PM / IP Logged

I want to connect triggers from all 5 doors to my alarm's door sensor. I know that diode-isolation is safe and also isolates the singal from each door interferering with other doors. Can I put 2 diodes in series in order to be safe? That way, if a diode shorts due to its life being over or whatever internal malfunction, it can only be cut but never short.

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sroth140

Silver - Posts: 513

Joined: August 27, 2003

Location: United States

Posted: March 07, 2004 at 8:39 PM / IP Logged

use 6amp doides. you have to on 95-99 cavaliers (4doors)

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markcars

Silver - Posts: 662

Joined: December 11, 2002

Location: New York, United States

Posted: March 07, 2004 at 8:45 PM / IP Logged

Do i need a 6amp diode on a highlander 03 door too? Or will a 1 or 2 amp diode do?

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JWorm

Platinum - Posts: 2,208

Joined: December 11, 2002

Location: New Hampshire, United States

Posted: March 08, 2004 at 12:10 AM / IP Logged

6 amp diodes? You're crazy. 1 amp is fine. No way the alarm's door trigger input is going to draw more than 1 amp. Its the alarm that determines the curremt draw, not the car.

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sroth140

Silver - Posts: 513

Joined: August 27, 2003

Location: United States

Posted: March 08, 2004 at 12:50 AM / IP Logged

well... no im not crazy, there are some installs that require them. so try and be respectful. putting diodes in series is crazy to me but i didnt lay it out like that.

http://www.directechs.com/techtips/pdfs/resources/security/directed_techtips/1075.pdf

MECP certified installer

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markcars

Silver - Posts: 662

Joined: December 11, 2002

Location: New York, United States

Posted: March 08, 2004 at 6:36 AM / IP Logged

sroth140, it looks like in your case/diagram, you do not need the 6am diodes except for the rear-doors only and that is because they are being used to draw current for the convenience system. If you look at the front door pin switches, they are not 6amp diodes. So you really need low amperage unless some device needs high amps (like the convenience center in this particular car model)

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double diode safety

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