how many trigger switches can i have?
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=118300
Printed Date: April 28, 2024 at 6:24 PM
Topic: how many trigger switches can i have?
Posted By: ajan246
Subject: how many trigger switches can i have?
Date Posted: December 07, 2009 at 2:13 AM
I am working on an install on a commercial truck, and the client wants every door of the truck's tool boxes to have a trigger switch. There are 4 doors and 6 tool box doors. How many trigger switches can i tie into the the same door trigger wiring? Or would i have to use auxiliary ports on the brain? the switches are simple self grounding pin switches.
any help will be appreciated.
thanks in advance,
ajan246
Replies:
Posted By: oldspark
Date Posted: December 07, 2009 at 4:12 AM
If they are all grounding, they can just be connected together (ie, paralleled).
The client won't be able to tell which of the individual switches triggered that alarm, but maybe that is not important....
(Until false triggering occurs, but that can be dealt with later - maybe for now just considering how to isolate each input till the culprit is found.)
And I'd assume interference suppression is installed at the alarm end (used to be a (say) 0.1uF cap; may now include series ferrite thanks to GSM and other induced spikes - real-world installers should know...).
Posted By: Powermyster
Date Posted: December 07, 2009 at 5:51 AM
Make sure tool chests in the truck are earthed to the body if your just fitting pin switches
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Why oh Why didn't i take the blue pill
Darren Power
Posted By: howie ll
Date Posted: December 07, 2009 at 5:54 AM
Exactly how I did it 10 years ago on a Winnie but I wired them in series and it still worked. No not quite, each switch was chassis grounded then the switched side led back to the "bus" which went back the alarm's trunk trigger so that knocking one out didn't ruin the others.
Posted By: KPierson
Date Posted: December 07, 2009 at 7:24 AM
I would put the vehicle doors on the door pin input then put the tool box doors on the trunk input. The problem with tool box switches is they seem to fail and cause problems before OEM door switches do. By seperating them it will make troubleshooting down the road a bit easier.
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Kevin Pierson
Posted By: howie ll
Date Posted: December 07, 2009 at 12:36 PM
Kevin you're quite right, I didn't think to mention it because it's so obvious. The errors of assuming.
Posted By: oldspark
Date Posted: December 07, 2009 at 3:16 PM
howie ll wrote:
Exactly how I did it 10 years ago on a Winnie but I wired them in series and it still worked. No not quite, ...
I hope readers understand the significance....
I was imagining " it still worked" - yeah.... with all 10 doors open AND with all switches working!
Or all 4 - or all 6 - open & working for either circuit using KP's worthwhile suggestion.
Excellent suggestions the lot of you. Even "not assuming" that boxes are earthed (that's where paralleled 2-terminal switches are good).
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