Operation, Installation, Factory Presets

Operation

The electric cooling fan controller provides a way to run up to two electric engine cooling fans or one two speed cooling fan. (A second relay, sold separately, is required for two speed or dual fan operation). The controller monitors the engine temperature using a dedicated sender, or a gauge and its sender. When the engine temperature goes above a user adjustable set point, the fan is turned on with a relay. When the engine has cooled below a user selectable off temperature, the fan is shut off. Separate on and off temperatures can be set for the high and low fan outputs. The controller will also run the fan when the air conditioner requires, by detecting when the air conditioning clutch is engaged.

The unit can be set to keep the fan running (if the engine is hot enough) after the key is turned off. Several delay times are available from no delay to five minutes. The display will countdown the seconds left before the fan is turned off. If the battery voltage drops too low, the fan will be turned off and a “Lo bAt” message will display for the remainder of the time.

Settings for several gauge systems are included to make installation with a gauge easier. The included gauges are Stewart Warner, Classic Instruments, VDO, and Autometer. If the gauge being used isn’t included, a custom calibration option allows the system to be calibrated to any gauge with clear numerical temp markings. This is accomplished by setting the controller to match the marks on the gauge with a few steps described in detail in the installation instructions.

IMPORTANT NOTE!!!: If using a gauge with this unit, always ensure that your gauge is working properly. If the gauge is not reading correctly, the fan control unit will not have correct temperature information and cannot be guaranteed to properly control the fan, possibly leading to overheating and engine damage.

If the gauge uses a two-wire temperature sender (such as Autometer full sweep) use of a dedicated Dakota Digital sender is

required.

If a gauge is not used, ONLY a Dakota Digital 300ºF sender should be used. Other senders may not give a correct reading to the control unit.

Custom gauge calibration requires numerical marks, stock “C-NORMAL-H” type gauges cannot be accurately calibrated to.

Required components for installation:

The PAC-2700 is shipped with necessary components for use with a single fan on a gauged system. These parts include:

1 PAC-2700 module

1RLY-3 relay with wiring harness

1Instruction manual

For some options of the PAC-2700, additional components are required. These are listed below.

-Second RLY-3 assembly (needed for dual fan or two speed fan operation)

-300ºF sender Dakota Digital temp sender (for operation without a gauge)

Installation

Note: Mount ONLY in vehicle cabin. Controller is not designed for engine compartment mounting. The terminal strip on this unit has 6 connections:

1.	Fan high relay	Connect to the white wire on the high fan relay assembly
		(for single fan applications leave unconnected)
2.	Fan low relay	Connect to the white wire on the low fan relay assembly
3.	Ground	Connect to a good chassis ground
4.	Power	Connect to a fused 12V battery
5.	Sender	Connect to the engine temperature sender wire.
6.	A/C clutch	Connect to the cycle switch on systems with air conditioning
		(on systems without air conditioning leave unconnected)
7.	Ignition	Connect to a circuit which has +12V only with the ignition key ON. (switched power)
Relay wiring:
White		Connect to control unit
Green		Connect to fused 12V battery circuit that can run cooling fan
Red		Connect to fused 12V battery
Black		Connect to cooling fan

Factory Presets

This controller comes preset to use a dedicated sender as follows:

Dakota Digital Sender only (no gauge, see above for 300ºF sender options) One single speed fan

205ºF on temperature 200ºF off temperature 30 sec Fan off delay

If the factory settings don’t fit your application, you will need to go through the setup procedure on the following page. At anytime during the setup procedure, the key may be turned off and the settings up to that point will be saved.

MAN# 650264:B

PAC-2700 specifications

The Dakota Digital PAC-2700 is a cutting-edge product that seamlessly combines advanced technologies with user-friendly features, making it an excellent accessory for automotive enthusiasts. Designed for modern vehicles, this programmable analog gauge system caters primarily to those who require accurate performance data without compromising on style.

One of the standout features of the PAC-2700 is its ability to monitor various engine parameters, giving users real-time insight into their vehicle's performance. It supports a variety of inputs, including temperature, pressure, and speed, ensuring a comprehensive overview of the engine’s health and functionality. This flexibility makes it suitable for car enthusiasts who may be modifying their vehicles for improved performance.

The PAC-2700 also incorporates a bright, high-contrast LED display that guarantees optimal visibility under any lighting conditions. This feature is particularly beneficial for street and race applications where clarity and quick access to data are crucial. Built with a modern aesthetic, the gauge set can easily adapt to different dashboard designs without looking out of place.

An integral aspect of the Dakota Digital PAC-2700 is its user-friendly programmability. Users can customize various settings, such as gauge settings, warning thresholds, and display units, allowing drivers to tailor the system to their specific needs. The intuitive interface is facilitated through a straightforward control panel, making adjustments easy, even for those with limited technical knowledge.

Furthermore, the PAC-2700 features advanced sensors that deliver precise readings, ensuring data accuracy over time. Built with durable materials, these sensors are designed to withstand the rigors of automotive environments while maintaining consistent performance. This enduring reliability is complemented by the system's simple installation process, which can be completed with minimal tools, making it accessible to both professional mechanics and DIY enthusiasts.

In terms of technology, the PAC-2700 leverages high-speed microprocessors that enhance the responsiveness of the gauge readings. This ensures that any changes in performance metrics are reflected in real-time, essential for performance tracking during competitive racing or spirited driving.

In summary, the Dakota Digital PAC-2700 brings together performance monitoring, customizable features, and technological advancement in a sleek package. Its combination of accuracy, durability, and ease of use makes it an essential tool for anyone serious about optimizing their vehicle's performance. Whether for racing, daily driving, or modification, the PAC-2700 stands out as a premier choice in the aftermarket automotive gauge market.