This Mustang Parts Installation Guide Works For
Tools RequiredBasic Hand Tools Required
Installation Time: 1 Hour
The 2-Step Launch Control is a low rpm limiter only. The factory speed limiter will not be affected.
This MSD 2-Step Launch Control is designed for Ford Modular 5.0L engines with Coil-on-Plug ignitions. The 2-Step Control switches to a lower rpm limit that will assist in consistent launches and 60-foot times. RPM adjustments are made via two rotary switches located on the harness side of the unit. The adjustment range is from 1,000 - 10,900 rpm, in 100 rpm increments. An LED will illuminate when the launch rev limit is active.
Note:It is recommended to have the Service Manual for your vehicle. If you cannot identify an activation wire, a microswitch or relay may be required.
Note:The engine rpm must drop more than one third of the set launch limit in order to activate. For example, if the launch limit is set at 3,000 rpm, the engine speed must drop below 2,000 rpm in order for the launch limit to become active (one third of 3,000 rpm is a 1,000 rpm drop).
Caution:Keeping the engine on a lower rpm limit may cause the Check Engine light to come on and could potentially damage the catalytic converter.
IMPORTANT:Due to wiring variations on different models, MSD cannot identify specific wiring on the clutch switches. Consult your Service Manual for wiring schematics.
The 2-Step Control can be mounted in any position but keep in mind to mount it so the rotary dials are accessible for adjustments. Hardware is supplied for mounting. Before mounting the unit, confirm that the wiring harnesses reach their connections.
|Tan (8)||Signal Connections.|
|Red||12 volt Connection through this single Red wire.|
|Black||Connects to a good engine round or the negative battery terminal.|
|Blue||Activation Wire. When grounded, the launch feature will be active.|
|White/Blue||Activation Wire. When switched to 12 volts, the launch feature will be active.|
LED On - This confirms that the wiring is correct and you can move to step 6 (Figure 1).LED Off - The wiring is different for this application and needs to be changed. Turn the key Off, plug the8-pin connector with the eight Gray wires into the connector with the single Red wire (Figure 2).
Figure 1 Wiring the 2-Step Launch Control.
Figure 2 Alternate Wiring.
The launch rpm limit can be activated through a ground or a 12 volt source.
Ground:Switch the Blue wire to ground to activate the launch limit.
12 volts:Connect the White/Blue wire to 12 volts to activate the launch limit.
If you are planning to use the factory clutch switch to activate the 2-Step, note that there may be variations in factory wiring colors and outputs. It is recommended that you have the factory wiring diagram and schematic. Also, check any wiring for voltage or ground with the key on, during cranking and when the engine is running. A relay may be required with factory wiring systems.
Figure 3 Wiring the Launch Activation Wire.
With the power On, engine running, activate the On/Off switch. If connected correct, the LED will illuminate when the clutch is activated. To verify the rpm, set the limit at a lower rpm, such as 2,000, and test the system.
If the engine has trouble starting or running. check the following: