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DASH2PROInstallation / ConnectionToVehicleWiringHarness

Connections to the vehicle wiring harness

Indicators/hazard warning lights

The warning lights for the indicators and hazard lights are activated by applying 12v to Connector B, pins 16 and 17 (right and left indicators, respectively) as identified in Table 1. These should normally be connected directly to the vehicle wiring loom between the indicator switch and the indicator itself.

The brightness of the LEDs will vary depending on the status of the sidelight input. This feature is included to dim the indicator warning lights at night to avoid dazzling the driver, yet allow them to be clearly visible during daylight hours.

Main beam warning light

The main beam warning light is activated when 12v is applied to Connector B, Pin 8, as shown in Table 1. This is usually achieved by connecting to the vehicle wiring loom between the headlight switch and the main beam bulb(s).

Brake warning light

The brake warning light is activated when 0v is applied to Connector B, Pin 11, as shown in Table 1. This is usually achieved by connecting directly to the handbrake warning switch and/or low brake fluid warning switch at the appropriate point in the vehicle wiring harness.

Fog light warning

The fog light warning is activated when 12v is applied to Connector B, Pin 19, as shown in Table 1. This is usually achieved by connecting to the vehicle wiring loom between the fog light switch and the fog light itself.

Alternator charge warning

This warning lamp is illuminated when alternator output is low and the vehicle battery is not being charged. This will be the case when the ignition is turned on but the engine is not running, or if there is an alternator fault. To make use of this feature, Connector B, Pin 10 should normally be connected to the field/alternator warning terminal on the alternator, via the relevant cable in the vehicle wiring harness. There is a 100 ohm resistor inside the DASH2 PRO to provide the required drive to the field on the alternator.

Sidelight input

The sidelight input is used to alter the brightness of the shift lights and indicator/hazard warning lights. This requires Connector B, Pin 14, as shown in Table 1, to be connected directly into the vehicle wiring loom between the sidelight switch and the sidelights themselves. When the input to this pin is at 0v the shift and indicator/hazard warning lights will be bright, but when the input to this pin is at 12v the shift and indicator/hazard warning lights will be dimmed slightly. The brightness of the shift lights can also be adjusted independently, as described in Configuring and changing the brightness of the shift lights.

Wheel speed input

Wheel speed input data is used by the DASH2 PRO for the vehicle speed, odometer and trip recorder displays, and for gear indicator calculations. This input requires a 5v or 12v square wave signal applied to Connector B, Pin 18, as listed in Table 1. This output format is normally provided by a standard vehicle wheel speed sensor. If not already fitted, these are available from Race Technology or from any good electrical or automotive component supplier. There is no conditioning on this input for a VRS sensor. The input has an internal pull down to ground so the input can be activated by a simple switch to either 5 or 12v. The procedure for configuring this input to the correct pulse rate per distance travelled is described in Odometer and Trip Meter.

Low level engine speed input

The low level engine speed input can be used with the DASH2 PRO in stand alone mode or with a data logger connected, to give an engine RPM input reading. This information is also used in the gear indicator calculation as well as for the shift light operation.

This channel requires a 5v or 12v square wave input applied to Connector B, pin 15 (P), as show in Table 1. IT MUST NOT BE CONNECTED DIRECTLY TO THE IGNITION COIL OR AN INDUCTIVE PICKUP FROM THE HIGH TENSION SIDE OF THE IGNITION SYSTEM. This channel should normally be connected to the engine speed output channel from the engine management ECU.

High level engine speed input

The engine speed input can be used with the DASH2 PRO in stand alone mode or with a data logger connected, to give an engine RPM input reading. This information is also used in the gear indicator calculation as well as for the shift light operation.

This channel requires high level pulse from the low tension side of an ignition coil or from an injector driver. The main signal must connect to connector B pin 6 (F) and a ground connection physically close to the signal pickup location must be connected to the high level RPM ground, connector B pin 7 (G).

Page last modified on February 02, 2015, at 03:02 AM