Radio Shack TD-1500 User Manual

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Cat. No. 49-851


Please read before using this equipment.


Auto Theft Deterrent System

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The TD-1500Auto Theft Deterrent System is a starter disable module that helps prevent auto theft or unauthorized vehicle use. It quickly connects to your vehicle’s ignition system, and has aneasy-to-useremote for arming and disarming. The armed indicator shows when the system is on, to deterwould-bethieves from attempting to break in.


It is important that you know where to find constant power, vehicle ground, and the starter wire under the dashboard of your vehicle. To help you find this, we recommend you get the wire color information from your vehicle’s dealer, in the vehicle’s service manual, or by calling the Auto Security Helpline at 1-800-598-2527.

You also need the following items:

12-volttest light or DC voltmeter

Wire-piercingprobe adapter (such as RadioShack Cat. No.278-715)

Several extra wire tap-inconnectors

©1996 Tandy Corporation. All Rights Reserved.

RadioShack is a trademark used by Tandy Corporation.


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Your TD-1500includes the following items. Be sure you have all items before you begin installation.

Main System

Wiring Harness


Status Indicator with Bracket and Harness


Two-ButtonRemoteDouble-Sided Tape

Wire Ties

Wire Tap-InConnectors


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As you install the system, see the “Wiring Diagram” on Page 11.



The starter wire connects the ignition switch to the starter solenoid. Follow these steps to find this wire.

1.Using the starter solenoid’s color coded wires as a guide, locate the wire that goes from your vehicle’s ignition (key) switch to the solenoid. This wire is usually found under the dashboard where the wires connect to the ignition switch. If you are unsure which is the correct wire, call the Auto Security Helpline at 1-800-598-2527.

2.Connect the negative (usually black) lead from a 12-volttest light or DC voltmeter to a metal vehicle body part.

3.Connect a wire-piercingprobe (Cat. No.278-715)to the positive lead and press the pin tip through the solenoid wire’s insulation and into the wire itself.



To the Meter


or Test Light



Solenoid Wire


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4.Start your vehicle. The test light should light or the meter should indicate voltage only while the engine is cranking (not while it is stopped or running).

5.If the test fails, contact the Auto Security Helpline at 1- 800-598-2527for assistance in finding the correct wire.

6.Turn off the engine. Then cut the wire you located in Steps 2–4at a point where there are several inches of wire on each side of the cut.

Note: If you cut the correct wire, you will not be able to start your vehicle until you complete installation.

7.Try to start your vehicle. The engine should not crank.

If it does crank, you cut an incorrect wire — use a wire tap-into restore the connection.

8.Snap a yellow tap-in’sgrooved channel over the wire going to the back of the ignition switch. Then push the system’s red/black wire into the other channel.

9.Use pliers to squeeze the metal tap down through the wires. Then snap the tap-in’splastic cover closed.

Wire from Switch

Red/Black Wire to System

10.Repeat Steps 8 and 9 for the wire going to the starter solenoid (the other end of the cut wire) and the system’s white wire.

11.Use the supplied large wire tie to resecure all loose wires.


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1.Touch the negative lead from a 12-volttest light or DC voltmeter to a metal part of your vehicle and use the positive lead (with awire-piercingprobe adapter) to probe for an existing wire that has 12 volts when your vehicle’s ignition is off.

2.Use one of the supplied wire tap-insto connect the system’s red wire to the wire you located in Step 1, then replace the fuse.

3.Connect the system’s black wire to a metal vehicle part, using an existing bolt or screw.

4.Plug the power harness’ three-pinconnector into the system with the antenna lead to the left (see “Wiring Diagram” on Page 11).

5.Immediately press DISARM on the remote transmitter. This trains the system to recognize the remote.


Select a highly visible location for the indicator. You can use the supplied bracket to stick the indicator on your dashboard or drill a hole in the dash’s front panel and insert the indicator. Follow these steps to install it.

1.Plug the indicator’s two-wireconnector into thetwo-wirejack on the system.


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2.If you are using the supplied bracket, clean the mounting surface with denatured alcohol and allow it to dry. Peel the backing off of one side of the double-sided tape and press it onto the bottom of the bracket. Then peel off the adhesive backing from the other side of the tape and press the bracket onto the dash.

If you are mounting the indicator in the dash’s front panel, drill a 5/16-inch hole at the selected location, taking care not to damage anything behind the surface.

Grommet Indicator

3.Push the supplied snap-ingrommet into the mounting surface’s hole from the front of the mounting surface (bracket or dash panel).

4.From the back of the mounting surface, push the indicator into the grommet until it snaps into place.


Use the two supplied small wire ties to secure the system under the dash. Secure all loose wires except the yellow antenna wire. Allow the antenna wire to hang down.


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You must train the system to respond to the supplied remote control. To activate the remote control, immediately after applying power, press DISARM on the remote. The system beeps twice.

If the system loses power, the system stops responding to the remote. To reactivate it, simply press DISARM on the remote after power is restored.

Your system can learn two remote codes if you want to add a second remote control (RadioShack Cat. No. 49-845).To activate a second remote control code, be sure the system is disarmed, then hold downARM for 10 seconds. The status indicator flashes. PressDISARM on the new remote to activate it. The status indicator stops flashing.


To disable your starter, press ARM on the remote control. The indicator flashes rapidly. If you try to start your vehicle, the engine does not crank.

To enable the starter, press DISARM on the remote control. The indicator turns off. The vehicle now starts as usual.


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To enjoy your starter kill module for a long time:

Keep the module dry. If it gets wet, wipe it dry immediately.

Handle the module gently and carefully. Don’t drop it.

Modifying or tampering with the starter kill module’s internal components can cause a malfunction and invalidate its warranty. If your starter kill module is not performing as it should, take it to your local RadioShack store for assistance.



If your remote control stops working or if its range is reduced, replace its battery. Follow these steps to replace the battery.

1.Snap apart the case halves, taking care not to lose any of the remote control’s pieces.

2.Remove the old battery and replace it with a 12-voltremote control battery (Cat. No.23-144).

3.Put all parts back in place and snap the case halves back together.

If you lose your remote control, you can get a replacement at your local RadioShack store. The four-buttonremote (Cat. No.49-845)also controls this system — just use the top two buttons.


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System Power . . . . . . . . . . . . . . . . . . . . . . . . 9–16Volts DC

Current Draw . . . . . . . . . . . . . . . . . . . . . . 22 mA (Disarmed)

Pulsed 40 mA (Armed)

Maximum Switched Current . . . . . . . . . . . . . . . . . . 30 Amps

Remote Control Battery . . . . . . . . . . . . . . . . . . . . . . . 12 Volt

Size (HWD) . . . . . . . . . . . . 33/8 × 23/8 × 11/8 Inches (System) 211/16 × 15/16 × 1/2 Inches (Remote)

Weight . . . . . . . . . . . 2.8 ounces (System Without Harness) 0.9 Ounces (Remote)

RF Carrier. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 303.875 MHz RF Power Output . . . . . . . . . . . . . . . . . . 5,580 μV at 1 Meter