Radio Shack RS-4000 Installation, Determining Your VEHICLE’S Power Door Lock Type

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49-840in.fm Page 7 Thursday, August 19, 1999 10:47 AM

INSTALLATION

DETERMINING YOUR VEHICLE’S POWER DOOR LOCK TYPE

There are three basic types of power door locks:

Type A: Requires a positive pulse on the lock/unlock control wires to lock or unlock the door.

Type B: Requires a ground pulse on the lock/unlock control wires to lock or unlock the door.

Type C: Requires a ground pulse on one control wire and a simultaneous positive pulse on another control wire to lock or unlock the door.

Follow these steps to determine your vehicle’s power door lock type.

1.Use your vehicle’s service man- ual, contact your vehicle manu- facturer, or contact the Auto Alarm Helpline at 1-800-598- 2527 to determine where to find the power door lock control wires. They are usually behind a panel near or on the door.

2.Perform each of the following sections, in order, until you suc- cessfully identify the switch type (first determine if the switch is a Type C — if it is not Type C, check for Type A — if it is not a Type A, check for Type B).

Note: To probe an insulated wire, put wire-piercing probe adapters on your meter or test light leads.

Type C Switch Test

Probe both wires. Then operate the door locks. If the light turns on or the meter indicates 12 volts while you operate the switch, the switch is a Type C switch. Call 1- 800-598-2527 for additional installation information, then pro- ceed to Step 3.

Type A Switch Test

If the light did not turn on or the meter did not indicate 12 volts, touch one lead from the 12-volt test light or volt meter to one of the control wires and touch the other lead to a metal vehicle chassis part. Operate your power door locks.

If the light turns on or the volt meter indicates 12 volts when you move the door lock switch to the LOCK position, you have located a Type A Lock control wire. Test the other wire.

If the light turns on or the volt meter indicates 12 volts when you move the door lock switch to the UNLOCK position, you have located a Type A Unlock control wire. Test the other wire (if you have not already done so).

If both wires are Type A control wires, go to Step 3.

Need Help? Call 1-800-598-2527

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Contents Installation Manual RS-4000 Auto Security Alarm SystemIntroduction After you complete this section Estimated ChecklistTime Contents Status Indicator with Bracket and Grommet Before YOU Begin the InstallationUsing Wire Piercing Probe Adapters Type a Switch Test InstallationDetermining Your VEHICLE’S Power Door Lock Type Type C Switch TestType B Switch Test Determining Your VEHICLE’S Door Switch Power TypeFailed All Tests Finding the Starter Wire Finding Your VEHICLE’S Parking Lights Wire Using Wire TAP-INS Finding Constant and Ignition PowerMounting the Main Module Installing the Status IndicatorMounting and Connecting the Siren Connecting the Starter Disable Module Connecting to PowerMounting and Connecting the ANTI- Carjacking Switch Connecting to the Parking Lights Connecting to Power Door LocksConnecting to the Door Switch Connecting Additional SensorsConnecting Accessory Devices Completing InstallationVolts Max Volts Min Source mA Load mA, Max SpecificationsMaster Wiring Diagram 49-840in.fm Page 19 Thursday, August 19, 1999 1047 AM RadioShack Division of Tandy Corporation Fort Worth, Texas

RS-4000 specifications

The Radio Shack RS-4000 is an iconic piece of technology that embodies the spirit of innovation in the consumer electronics industry during the late 20th century. Launched in the 1980s, this personal computer made a significant impact on the home computing landscape, appealing to hobbyists, educators, and early computer enthusiasts alike.

One of the standout features of the RS-4000 was its affordability, which made technology accessible to a broader audience. The computer was powered by a Zilog Z80 microprocessor, a popular choice at the time due to its reliable performance and efficiency. With a clock speed of 4 MHz, the RS-4000 provided basic computing capabilities that were sufficient for word processing, simple programming, and educational software.

The RS-4000 came with 64 KB of RAM, expandable up to 256 KB, allowing users to enhance the system’s performance as their needs grew. For data storage, the computer utilized an external cassette tape interface, which was a common method for saving and loading programs during that period. This tape system was ultimately replaced as technology progressed, but it represented a significant step forward in personal computing.

Another notable aspect of the Radio Shack RS-4000 was its comprehensive range of input and output options. The machine featured basic keyboard input, a built-in speaker for sound output, and compatibility with various peripherals, including printers and modems. Additionally, it provided both video output to standard television sets and the option for users to connect external monitors, bringing versatility to the display options.

The RS-4000 supported a variety of programming languages, including BASIC, which allowed users to delve into programming and develop their software applications. This capability contributed to the rise of a generation of computer coders and technology enthusiasts who would go on to shape the digital future.

In summary, the Radio Shack RS-4000 was more than just a computer; it was a catalyst for creativity and innovation during the formative years of personal computing. With its user-friendly design, expandability, and a growing library of software, the RS-4000 played a crucial role in helping individuals understand and embrace the digital age. Although technology has advanced significantly since its release, the legacy of the RS-4000 remains in the hearts of those who experienced it, marking a pivotal moment in the evolution of personal computers.
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