I have posted this in the past and didnt get a straight answer ever and doing a search brings up my old post and a few others but nothing to give a real answer.

Anyway, I have had a shock sensor sitting around for well over a year I got some time back I wanted to install.

I know that I need to hook up three wires. Pos, Neg, and (switch that is neg w/ car off and pos w/ car on).

My problem is which wire does this thats not a pain to get too?

The positive wire I can just hook to anything thats always hot, and the neg I know I can hook to like the door trigger but what I dont want to run into is hooking this all up and driving down the road and the car keep thinking the door is open because the shock sensor is passing the current when it need not be.

This is a GREAT mod, but seems few people do it and with me starting to put expensive things in my car this is a good way to help secure it.

PLEASE help!!

Thanks!

 

Come on anyone? Someone has to have done this? I just really dont want to use a relay, and everything I can find with pic is for older models and no plug in same spot for our cars.

Someone has to know a wire that is grounded only when the car is off and nothing when the car is on or a hot wire thats hot only when alarm active or car off...

 

A relay would actually be your best bet to completely isolate your shock sensor circuit.. You could easily wire it up so that when in "aux" or "on" the relay activates to "disconnect' your ground source. When "aux" or "on" power is not present the relay closes to complete the ground path for your sensor. Keep you from messing with and/or trying to figure out an existing/equivalent ground circuit etc..

Visit Radio Shack, they have some very small, low draw, double pole relays that will work perfect.

 

you can hook it to the door trigger

 

I know that but you have to find a switched power or ground otherwise when you drive down the road your dome lights will flash with the shock impact unless you get a way to turn the sensor off.

 

The orginal post was in this thread: shock sensor wire help.

Since you have decided to start a new discussion, I'm locking the other one.

Next time, please bump the old thread. Thanks.

 

Sounds like you tap into the existing door alarm trigger wire with the shock sensor "alarm activation" lead. Take the 12v+ lead from the shock sensor and find a "constant" 12v+ source. Take the sensor (-) lead and run through a relay to ground. Power the relay with an "aux" or "on" source thus only connects the ground circuit when the car is "on" etc.. You do have to find the appropriate relay that basically has three circuits: one to power the relay, the other two - one on when the relay is powered and the other off and visa verse.

 

Ya I just rather not use a relay. Anyone know where the hood pin wire is maybe inside the car or is it not?

Relay is just somthing else in the circuit that shouldnt need to be used and a risk of something else to break or go wrong. Yea its easy but ideally its not the correct way.

 

Anyone know where I could get a shock sensor from and how much?

 

ebay $5