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Old 10th March 2005
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A Million Facts & Figures
 
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Quote:
Originally Posted by cantolina
Do you mean the diff. between the ignition modules that have both black and white connectors (mounted on the frame) and those in the gearcase with wire attached??
An 8-pin module looks like this:



They typically mount under the seat.

Some of these modules will have an extra couple wires that don't go through the 8-pin Deutsch connector. If the module supports single fire (this one doesn't), it needs more wires because it has to provide a separate primary signal for the other coil as well as a tach signal (since each primary outputs are each running at half frequency in a single fire arrangement).

A nose cone module looks like this:



These things integrate the ignition module and the pickup unit into one handy package that goes in the nose cone of the gearcase.

HD went to nose cone modules in Sportsters beginning in '98. Retrofitting an 8-pin module, or it's predecessor the 7-pin module, is doable but a hassle. Gotta put in an old style pickup unit and wire in an 8-pin connector and figure out how to mount the thing.

The color codes on the wires are pretty standard, though. From memory, 8 pin modules look like this:

red, green, & black go to the pickup unit
pink is the primary signal (to one side of the coil)
white is the power (generally leads to the other side of the coil, where a wire from the handlebar switch meets it and provides power).
purple is the VOES switch input (grounded = high vacuum)
and there's a ground in there somewhere.
Only 7 pins of the 8-pin connector are used.

Wouldn't be surprised if the factory nose cone modules have similar color codes.

In '04 of course they eliminated the nose cone module and went to the TC88 style module that works off a crank trigger.
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