S&S Cycle IST Ignition System for S&S V-Series Engines with Flywheel Machined for Crank Trigger User Manual
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9. IST power harness adapter connections
The power harness adapter (55-1540) is used when installing the IST ignition on an engine used in a custom application. It has an 8-pin
connector that plugs into the matching connector of the Main IST harness. The power harness 8-pin connector has three wires coming
out of it: chassis ground, switched ignition power (battery +), and tachometer signal. Only two connections to the motorcycle are required
for the ignition system to operate: chassis ground, and switched ignition power (battery +). The tachometer trigger wire is optional. See
Picture 11 and Table 1, below.
a. Connect the power harness into IST ignition system, making any corrections in wiring lengths by cutting and splicing using supplied
connectors.
NOTES:
•
Install to source appropriate wire for any additions. use supplied shrink tube and wire cover to insulate and protect wires and connections.
•
Stagger any splices in a wire harness bundle. This reduces the chance of wear between adjacent splices. It also makes it easier to pass splices wire
through the harness sleeving.
• Crimp connections are preferred over soldered connections. Soldering causes stress concentrations at the wire to solder joint. Soldered connections are
prone to break in high vibration environments.
• In most cases, the switched ignition power connection is made in the wire leading from the ignition switch to the coil.
•
If not using a tach, the tach signal wire may be removed from the connector.
C. Initial Starting and Operation Procedure:
Because the S&S® Intelligent Spark Technology Ignition System is designed to learn the specific engine/motorcycle configuration it is being
used for, the following initial starting and operating procedures must be followed after installing the system for the first time. These procedures
need to be followed only once. After that, the motorcycle can be started and ridden as usual.
1. Initial Starting Procedure
Damage to coil may result if Steps (a) thru (c) below are not followed!
a. After installation is complete, disconnect spark plug wires from spark plugs mounted in engine. Connect spark plug wires to spark testers
or a spare set of spark plugs, both methods must be adequately grounded to the cylinder head.
9
Picture 11
Table 1
Wire Color
Coil Terminal
Designation
Main
Stripe
White
Black
Battery “+”
Yellow
Blue
Rear Cylinder
Blue
Orange
Front Cylinder
WARNING