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Discussion Starter · #1 ·
I have this car alarm that my sister pulled from her car before it was impounded. All I have is the main control unit and I do not have the plug or wires that connect into the main unit. I was planning to solder each wire to each of the pins, but I don't know what all the letters mean on the PCB, therefore, I don't know what connects to what and how to wire it. If anyone would be willing to help me figure out what each pin represents, it would be much appreciated...

Here's what I've got so far:
There are 14 Pins to the main board - Next to the 14pin plug assembly there are another 2pins labeled LED, 4pins labeled sensor, and an unlabeled switch.

The 14pins I'm going to label in order from L to R as they are on the PCB:
==================
-----------|
1 - PL
2 - 12V
3 - S
4 - NT
5 - IG
6 - CH3
7 - GND
8 - H
9 - PT
10 - ST
11 - DOM
12 - CH2
13 - UK
14 - LK
-----------|

L-------|
E 1 -
D 2 -
-------|

S-------|
E 1 -
N 2 -
S 3 -
O 4 -
R-------|

-------|
-[sw]-
-------|

==================
-------------------------------
So i know what the simple ones are, but don't know the meanings for:
S, NT, IG, H, PT, ST, UK, LK... or what CH 2 and CH3 would wire to. so If anyone could help out, that would be grand.
 

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Alarms like these are cheap so I would recommend just buying a new one that comes with the manual. Without the manual it will be tough to know what is what for some of the connections. Besides, you will likely need other parts like relays and such... and this thing may even be broken.

If you must pursue this I'd suggest posting to the auto forum, or visit: http://www.the12volt.com/

Maybe someone there can help identify this unit and help with the connections. But I really wouldn't waste my time if I were you.
 

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Discussion Starter · #6 ·
Thank you for the info and advice, but I'm going to try to get it going. I try to get things done with as little of a cost as possible, by recycling this alarm I can reduce the cost of everything by over a hundred dollars. Security systems aren't cheap. and any parts that I'll need I probably have. I do it as a hobby. Again I appreciate the input, You have been the only one to respond thus far.
 

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Actually they are cheap, especially compared to the value of one's time. If yours had a mfgs label that might help you identify it but otherwise it's gonna be tough. And the parts you will need (harness, relays, valet switch, shock sensor, remotes, siren, LED, etc.) might cost as much as many complete new units. Just Google for autopage, crimestopper, omega for a few well known mid-priced brands. You can get a complete basic alarm system for ~$50-75 or even less, a high end one for ~$150-250. Here is an example that would be far better than what you have: http://www.onlinecarstereo.com/CarAudio/p_29823_AutoPage_RF-350.aspx

You likely won't get many responses here in the Elec forum. It primarily deals with house wiring. I happen to have installed a number of these in my day so thought I'd chime in even though this is basically OT here.

Good luck.
 

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Discussion Starter · #8 ·
Yeah. I'll probably just do that... I was going to make a project out of it, but it's seemly becoming more of a hassle than an improvement. and i thought they'd be much more expensive but 50 isn't bad. Thank you.
 
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