S&S Cycle IST Ignition System for 1984-1999 Big Twin and Custom Applications User Manual

Page 9

6. Installation of the IST Ignition Module and Main IST Wiring Harness:
The Main IST Wiring Harness (See Picture 13, below) is a one-piece assembly consisting of the following connectors:
(a) IST Ignition Module Connector: 32-Socket, Gray (Delphi®/Packard®) - Connects to the S&S® Intelligent Spark Technology Ignition

Module.

(b) Motorcycle Main Harness Connector: 8-socket Black (Deutsch) – Connects to the stock Harley-Davidson® wiring harness in place of

the stock module.

(c) Head Temperature Sensor Connector: 2-Socket black (Delphi®/Packard®)
(d) Knock Sensor Connector: 2-Socket black (Bosch)
(e) MAP Sensor Connector: 3-Socket (Delphi®/Packard®)
(f) Coil Harness Connector 3-socket (Delphi®/Packard®)
(g) Cam Position Sensor Connector: 3-Socket black (Deutsch)
(h) Data Link Connector with Plug: 4-Pin gray (Deutsch)

The IST ignition module also includes a hardware packet. The hardware is intended for spacing the module and the connector off of the

mounting back plate. Washers are also included for the mounting screws. The washers are used as needed, and may not be necessary for
some installations. The hardware packet includes the following spacers and washers:

• .200" Spacers (2)
• .060" Spacers (4)
• .475" O.D. Washers (2)
• .250 I.D. Lockwashers (2)

a. Route the wiring harness along the bike frame so that the Ignition Module Connector (a) See Picture 13 reaches the Module mounting

location.

b. Connect the Ignition Module Connector (a) See Picture 13 to the Module.
c. Install the module using the stock mounting hardware and the S&S® hardware (if necessary) included with the module.
d. Plug the 8-pin black plug from the stock wiring harness into the black 8-socket Motorcycle Main Harness Connector (b) on the S&S

harness. See Picture 13.

e. The remaining portion of the harness that connects to the Head Temperature Sensor, MAP Sensor, and the Knock Sensor should be

routed along with the stock wiring under the gas tank.

f. Use the provided wire ties to secure this portion of the harness to the motorcycle frame or a portion of the existing harness. Do not allow

any harness to touch cylinder or head fins.

g. Connect the Head Temperature Connector (c), Knock Sensor Connector (d), and MAP Sensor (e) to the corresponding sensors. See

Picture 13.

NOTE: If the tank is removed or raised, temporarily replace it to insure clearance for the Engine Temperature, MAP, and Knock Sensor portions of the
harness. Reroute any wires that may be damaged from installing the tank.

Picture 13