83 Factory Alarm - how to remove?

MJM911SC · 02-23-2003, 01:54 PM

I have a no start, no spark problem that I think is a bad reference sensor (no resistance). Everything else checks out ok EXCEPT I am worried about the factory alarm circuitry. I don't have any of the alarm controls, the siren is gone and I would rather alarm the car with an updated system. Plus I am worried that it may eventually kill the ignition - electrical diagrams indicate this alarm is tied in to the kill the coil (between coil and DME).

Here is a picture of the alarm

Here is the wiring harness for the alarm

How do I safely remove this alarm from the circuitry without killing the ignition?

Thanks in advance,
Mike M
83 944
Davis, CA

Scott R · Scott R's Garage

I don't think thats a factory setup. In fact I am sure that its not.

AaronM · 02-23-2003, 02:06 PM

Ditto on that not being factory. The factory setup was engaged by an extra key. There was a keyhole in the forward part of the driver's side rear fender to activate it.

Aaron

MJM911SC · 02-23-2003, 02:11 PM

Sorry, my bad. Okay, so it's not factory - thanks. How should it be removed?

Any advice?
Mike M
83 944
Davis, CA

AaronM · 02-23-2003, 02:42 PM

The only thing I can think of would be to look for a model # or a company name and contact the manufacturer.

You might also try finding a shop that specialises in doing alarms and have them remove it.

If you've got a lot of time, you can just cut all the wires going to the unit and sort it all out with a multi-meter.

Aaron

highboost951 · 02-23-2003, 03:01 PM

Just remove the whole thing, and splice together any original wires that they may have cut to install an interrupt device into, ex. large ignition wire under the drivers side dash area coming from the ignition switch. You'll need a big yellow butt connector. Your best bet would be to remove it all, or if you'd like as suggested, contact an install shop, they may be able to get you some new controllers and straighten things out for you so that you can use it.

SoCal Driver · SoCal Driver's Garage

On the 83 electrical diagrams here on Pelican there is a connection point for an alarm into the coil/tach wire. Most likely a "factory" alarm or a third party alarm installed by the dealer will use this connection point.

Most after market alarms ground out or interrupt the coil trigger wire. If the alarm installer followed the factory wiring then it's grounding out the tach/coil wire.

As is implied; you will have to trace down the wires and get back to us where they connect and to what color code wire. The color for the factory wire is green.

Sternn · 02-24-2003, 06:02 AM

Ungo makes a good alarm but they are right - its not factory at all.

It will be hard to find specs on that model though. Ungo was bought out by Clarion back in the mid 90's. Clarion has an Ungo section on their website, but it lacks any type of downloads or specs page. You may try and email them and see if they have any specs they can send you though.

I can give you a little info on this system as I have one stuck in a box I used to have in an older car.

First, unlike the Porsche alarm, Ungo never offered any ignition kill so you will never have that issue.

Second, the wiring is rather simple. Red = Power (one is for constant from the battery, the other is coming from the ignition, as to disarm the system when engaged), Black = ground, and most of the other wires go to recievers or switches (i.e. the little switch that turns the light on when the door is opened). The fact there are many black wires means someone didn't use factory wire and just ran their own (probably bought the box second hand and just bought a spool of wire).

Either way, if you plan to get it replaced just let the shop do it. By having that already there they can save time running new lines to the switches and having to pull apart your interior.

-S