As an example we ll use a drag car with a three step module selec tor plugged into the rpm socket of a 7al 2 ignition.
Msd 3 step module wiring diagram.
4 installation instructions s uêwwwmsdperformance comê uê x ê nxx ç óî ê uê 8 ê x ê nxç îî wiring general wiring information wire length.
Find msd three step module selectors 8737.
All of the wires of the msd ignition may be shortened as long as quality connectors are used or soldered in place.
When the line lock button is released.
Msd also makes one of these for the digital 6al box.
By connecting one wire to the line lock circuit one module will be activated during the burnout.
Start retard the start retard of the 7al 3 is designed to ease starting on engines with locked timing high compression and a lot of advance.
Collection of msd digital 6al wiring diagram.
1 parts bag wiring terminals 1 module selector 4 mounting screws note.
Module 3 active with 12 volts on blue wire.
They feature three built in rev limiters one for burnout one for starting line launch and one for high end.
To 12v clutch switch msd micro switch pn.
Msd 3 step module selectors are designed for great versatility.
When activated the timing is retarded 25.
It shows the components of the circuit as simplified shapes and also the power as well as signal connections in between the tools.
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Here is the install of the msd 3 step.
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Installation instructions optional wiring this wiring section details the optional features of the msd 7al 3 and how to wire each system.
These selectors use the msd plug in rpm modules.
The different rpm modules are activated when 12 volts are applied to a corresponding wire.
Figure 3 basic three step installation.
A wiring diagram is a simplified standard pictorial representation of an electrical circuit.
T a c h c c ign pts m m ground rpm to ground to 12v module 2 active with no voltage.
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This module will also be active if 12 volts are supplied to the red and blue wires.
Msd two step wiring diagram wiring diagram is a simplified usual pictorial representation of an electrical circuit it shows the components of the circuit as simplified shapes and the talent and signal friends amongst the devices.
Module 1 active with 12 volts on red wire.
Do not use solid core spark plug wires with any msd component.
This helps keep tire temperatures consistent.
Page 1 msd module selectors two step pn 8739 three step pn 8737 parts included.