2011 ford fussion hood pin?

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=128068
Printed Date: April 27, 2024 at 10:47 PM

Topic: 2011 ford fussion hood pin?

Posted By: je3169
Subject: 2011 ford fussion hood pin?
Date Posted: July 27, 2011 at 5:32 PM

Need your help on this one guys! My hood pin is NC (showing ground when hood is closed ) I am installing a shock sensor that goes to ground when triggered. My question is how do I make the two work? I know how to change the shock sensor to match the hood pin with a relay. My question is how do I make them work independently going to the same source?

Replies:

Posted By: t&t tech
Date Posted: July 27, 2011 at 8:15 PM

If you're talking about discerning which sensor triggered forget it, you can't, both will report as the same zone.

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COMMIT YOUR WAY TO JEHOVAH AND HE WILL ACT IN YOUR BEHALF. PSALMS 37:5

Posted By: i am an idiot
Date Posted: July 27, 2011 at 8:23 PM

I am guessing that you are using a factory alarm. Are we right?

Posted By: je3169
Date Posted: July 27, 2011 at 9:59 PM

Hi thanks for the reply! I am ok with the zone issue and yes it is a factory perimeter alarm. I am hooking up a Shock sensor, using the hood pin as an input to trigger the alarm. The hood pin is normally closed ( when hood is shut the hood pin shows grounded ) and my shock sensor when triggered throughs out a ground. I know how to change that to match the hood pin with a relay. My question is how do I isolate them from each other? Meaning How do I show one being triggered while the other stays grounded?

Thanks

John

Posted By: i am an idiot
Date Posted: July 27, 2011 at 11:39 PM

From the ground output of the shock sensor to drive a transistor to trigger a relay to open the circuit of the hood pin switch.

Pay no attention to the text at left side of picture. The left leg of the transistor connects to the ground output wire of the shock sensor. The right leg of the transistor connects to terminal 85 of the relay. 86 of the relay needs constant power. Find the wire of the hood pin and cut it. Connect one of the cut wires to terminal 30 of the relay. connect the other cut wire to terminal 87A. When the shock sensor detects an impact, it will trigger the relay and open the connection just as if you opened the hood. You may have issues if the pulse from the shock sensor is not long enough for the alarm to see. You may also want to use a second relay to only provide power to 86 only when the ignition is turned off. Otherwise your relay will be clicking as you are driving down the road. Let me know if you need wiring for that relay.

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Posted By: je3169
Date Posted: July 27, 2011 at 11:44 PM

sounds good Thanks.

John

Posted By: je3169
Date Posted: July 28, 2011 at 12:06 AM

YOU ARE THE MAN!!! thanks for the help

John

Posted By: je3169
Date Posted: July 28, 2011 at 12:16 AM

Should I ground the middle leg ?

Posted By: i am an idiot
Date Posted: July 28, 2011 at 12:22 AM

Yes, the metal tab is also connected to the middle leg. You can mount the metal tab to the chassis of the vehicle. This will also help with cooling of the transistor. I do not see it heating up at all, but heat dissapation is king.

Posted By: je3169
Date Posted: July 28, 2011 at 12:25 AM

Great Thanks again for all your help

John

Posted By: je3169
Date Posted: August 02, 2011 at 2:15 AM

Ford has a perimeter alarm installed at the factory doors hood and trunk where when you hit lock on the key fob 20 sec later the alarm turns on and if you open the doors or hood or trunk without unlocking with the key fob the horn will honk for 30 sec and the lights will blink for 5 min.