how does a hood sensor work?

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=106145
Printed Date: May 11, 2025 at 4:03 AM

Topic: how does a hood sensor work?

Posted By: lstarno
Subject: how does a hood sensor work?
Date Posted: July 15, 2008 at 11:33 AM

More specifically, how do you wire it? Do you just take the wire from the brain for the senor and plug it on the bottom? Then where it mount it is where the ground is?

Thanks for your help

Replies:

Posted By: KPierson
Date Posted: July 15, 2008 at 12:14 PM

Yes, they typically ground through their metal body.

If you look closely, you will see the entire body is metal. The plunger itself is plastic. On the end of the plastic plunger there is a metal connector for your wiring. When the hood pushes the plunger in the metal connector is seperated from the metal body. When the hood is open and the plunger springs back to its normal position the metal connector touches the metal body it sends a ground signal to the alarm brain.

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Kevin Pierson

Posted By: howie ll
Date Posted: July 15, 2008 at 1:10 PM

What's this Kevin, back to basics? You've more patience than me. H. Remember when mounting a hood sensor to check clearance, don't mount where water will pool as this could cause a short. If you're not sure where to mount it use putty or plasticine (modelling clay) to check depths etc. I look at rubber hood stops etc to give me a position.

Posted By: KPierson
Date Posted: July 15, 2008 at 3:23 PM

Basics? Ha!

In a year from now he'll be asking how murcury switches work so he can replace the rusted out hood pin!

I never did find a way to mount them where they would survive an Ohio winter.

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Kevin Pierson

Posted By: lstarno
Date Posted: July 15, 2008 at 4:01 PM

thx for the help guys I live in Canada so you're probably right!