Adding Remote Start To An Existing Alarm

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steveo200077

Member - Posts: 5

Joined: July 28, 2006

Location: United States

Posted: November 29, 2006 at 10:52 PM / IP Logged

i has a autopage rf520lcd i diddent come with remote start.

I was wondering if there was a remote start module that could run off one of the aux outputs on the rf520lcd

swamprat323

Gold - Posts: 1,335

Joined: September 22, 2002

Location: Florida, United States

Posted: November 29, 2006 at 11:29 PM / IP Logged

yes if you have an aux output you can get a RS add on several companys make them DEI 561T is a good one just do a search for DEI 561T. you find severl site that sell them

NowYaKnow

Gold - Posts: 1,217

Joined: December 18, 2002

Posted: November 29, 2006 at 11:53 PM / IP Logged

There are add on systems, but I generally would advise removing what's there and replacing with a complete Remote start/alarm system. You run into some issues of the alarm going off when it sees the ignition come on for R/S, the car starting setting the shock off, and other random things. Nothing you can't get around, but it can be a pain to use both together sometimes.

Mike

gcguy

Member - Posts: 3

Joined: December 01, 2006

Posted: December 01, 2006 at 10:41 PM / IP Logged

I have purchased a standalone RS unit to put into an 03 Grand Caravan with aftermarket alarm installed by a local shop.

The existing alarm is a k-9 classic with 3rd channel output. If I use the 3rd channel output to trigger the RS, would the alarm go off?

I'm also concerned with the alarm not being able to disarm afte RS since the ignition wire will be energized.

To get around this, would I be alright to use a relay to disconnect the ignition wire from the alarm while remotestarted?

master5

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Joined: October 10, 2006

Location: United States

Posted: December 01, 2006 at 10:56 PM / IP Logged

All aftermarket "add-on" remote start units will have whats called an "ignition bypass" What this does is disconnect the ignition feed to the security system during remote start so it does not false and the remote transmitter works as normal. It is only one wire..not a big deal at all. Now I know DEI products automatically bypass the sensor inputs when using a spare channel to prevent a sensor from triggering..if your system does not have a built in sensor bypass..you can fix that easy with a relay. But first try it because your sensor may not trigger just from start. If it does take a relay and connect 86 to ignition...85 to ground. Cut the power wire off the sensor and put one side to 30..one to 87a..this will bypass the sensor during remote start only..everything back to normal when the car is off..so simple really. If the system has a neg out during RS..even better..connect that wire to 85..86 to ignition..and 30 and 87a as before to sensor +

Enjoy

master5

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Joined: October 10, 2006

Location: United States

Posted: December 01, 2006 at 11:03 PM / IP Logged

Ok..now with a stand alone....it might have an ignition bypass wire or not. If it doesn't..wire the relay as such.....take the ignition wire of the alarm system and connect it to 87a...put 30 and 86 to the ignition harness of the vehicle. ground 85. This will send ignition to the alarm as normal ..but take it away during RS so effectivly bypassing it..also easy.

gcguy

Member - Posts: 3

Joined: December 01, 2006

Posted: December 02, 2006 at 7:40 AM / IP Logged

Hi master5,

Using the method you just posted, wouldn't the relay be active whenever the engine is running, including while driving the vehicle? It seems like I would be able to lock and unlock the alarm even when the car is running.

Thanks

master5

Silver - Posts: 1,123

Joined: October 10, 2006

Location: United States

Posted: December 02, 2006 at 11:57 AM / IP Logged

Yes it would so you need to use the second method ..if any unit does not have the appropriate output i would need to see a wiring diagram or use diodes..but either way it won't be difficult unless someone considers connecting a few wires to a relay as difficult...if that's the case they should not consider this industry.

master5

Silver - Posts: 1,123

Joined: October 10, 2006

Location: United States

Posted: December 02, 2006 at 12:32 PM / IP Logged

If you remote start does not have an ignition bypass of the appropriate neg. output wire..use this method...simple

Adding Remote Start To An Existing Alarm -- posted image.

master5

Silver - Posts: 1,123

Joined: October 10, 2006

Location: United States

Posted: December 02, 2006 at 12:36 PM / IP Logged

gcguy...hope that helped.

sorry the other circuit was wrong..been a long week..lol

Take care

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