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Join Date: Dec 2011
Location: Raleigh, NC
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Removing the remains of the factory alarm

Currently, my factory alarm control unit has been removed but someone has put a jumper on the original connector to get the fuel pump to function. What is the best way to completely remove the factory alarm system on an '82 911SC?
I have done numerous searches on the forum but nothing relates specifically to completely removing the anti theft system.
Is it a matter of just finding where the alarm system connects to the factory wiring system and just removing those connections from the equation? I can see where the alarm system connects in to the stock wiring but I am just not sure what the ramifications are of removing the wiring completely.

Thanks

Old 01-14-2012, 04:07 PM
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...photos added





I have attached a couple photos to be a little more specific.
The first photo shows the Yellow, Red/wht and Brn/Red wires coming from the Fuel Pump relay and connecting to the plastic connectors that eventually lead to the factory alarm system. If I simply bypass the plastic connectors and re-attach the wires at the point where they enter the loom will that allow me to remove the remaining alarm wiring?

The second photo is the original Alarm Control Unit connector with the jumper between the Blu and Blu/Red wires. The Bentley's diagram shows that these two wires go to the Alternator and Battery Charge indicator light in the dash.

If I can bypass the alarm connections on the Fuel Pump relay as described above, will I still need to jumper the Blu and Blu/Red wires?

Thanks for any asistance.
Old 01-15-2012, 05:26 AM
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Is it an Ungo? The manuals are online. I would RTFB before attempting to remove that rat's nest.....

There was a recent thread on this with a link to the manuals.
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Old 01-15-2012, 05:30 AM
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The Alarm Control unit is the factory Hella (911 637 104 00). It has been removed from the car. Everything works fine with the exception of the FP running in any On key position. I just want to remove the additional wiring if possible without causing other issues.
Old 01-15-2012, 05:39 AM
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Do you have the Bentley manual for the SC? Where are you located?
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Old 01-15-2012, 05:59 AM
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Yes. I have the Bentley Manual. That is where I got the Alarm diagram. It just isn't clear where the Alarm system ties into the factory wiring and whether I can remove it without messing up the Fuel Pump jumpers on the Blu and Blu/Red wires.

I am in NC.
Old 01-15-2012, 07:28 AM
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Quote:
Originally Posted by Dogbreath View Post
The second photo is the original Alarm Control Unit connector with the jumper between the Blu and Blu/Red wires. The Bentley's diagram shows that these two wires go to the Alternator and Battery Charge indicator light in the dash.

If I can bypass the alarm connections on the Fuel Pump relay as described above, will I still need to jumper the Blu and Blu/Red wires?

Thanks for any asistance.
Yes.

If you remove the jumper the engine won't start, try it.

You can remove the excess wiring but those 2 wires must be connected.

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Old 01-15-2012, 07:37 AM
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