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====== REF: Electrical System ======
 * See also [[techtalk:ih:elec08|Illustrated Stock Wiring Diagrams]] in the Ironhead Section of the Sportsterpedia. \\ 
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====== Ironhead - Simplified (Customized) Wiring Schematics ======

===== Minimal Configuration (w/Ultima Module) =====

The following wiring diagram is a minimal config - **No Starter - No Turn Signals - No Front Brake Switch - No Kill Switch.**

The ignition module is an Ultima version and fits in the nosecone where previously only the cam sensor plate was mounted. In this diagram the __Ultima Single-Fire Configuration__ is used, feeding separate trigger signals to the dual coils to fire the front & rear spark plugs separately (the Ultima BLUE wire fires the front coil & the Ultima PINK wire fires the rear coil).

If you choose to use a __dual-fire configuration of the Ultima ignition__, it will also work when you pair it to the appropriate dual-fire coil. In that case, you will only use the Ultima PINK wire to fire the selected dual-fire coil. (The Ultima BLUE wire will not be used at all with a dual-fire version.)

Using the VOES connection with either configuration (which helps with idle & cruising spark timing by providing more advance) is recommended by connecting the Ultima VIOLET wire to the VOES unit.

Implementing a tachometer is optional. If used, the Ultima GREEN wire will connect to the tachometer signal input wire. The tach will also need a ground connection on the bike and key-operated power for the tach light.

There are only six wire colors to minimize wire purchase: **Black - White - Red - Blue - Yellow - Green.** There are enough colors so that no connecting point should have the same color twice in order to make it easier to know which device is connected to/from another device.

This circuit uses the Frame/Engine for ground conduction. Be sure you have good ground points at the needed locations or run a separate black wire to those locations to assure a good ground.

Beware that the brake light shares the same fuse as the ignition circuit - So, if you have a short to ground in the brake circuit it will blow the fuse & kill the ignition. You could add a separate fuse for the brake light to avoid that potential problem.

The diagram shows an optional Gen Light, implemented with a diode and an incandescent bulb.

To implement the VOES, add it with a vacuum hose to the carb - then wire the single VOES wire into the Violet Wire of the Ultima ignition module.

To implement a tachometer, use a normal HD dual-fire tach and wire the input signal to the Green Wire of the Ultima module.


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===== Other Simplified Wiring Diagrams =====
**( CLICK ON THE DIAGRAM to get a larger version to display )**
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|Wiring for Magneto Fired Sportsters ((drawing by FourCams of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/66193-magneto-ironheads/page4?t=426562&page=4))|
{{:common:space100x5px.jpg}}{{:techtalk:ih:elec:wiring_diagram_for_magneto_ignitions_by_fourcams.jpg?direct&400|}}

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|Wiring for an Electric Start Sportster ((drawing by OutlawTexan67))|
{{:common:space100x5px.jpg}}{{:techtalk:ih:elec:wiring13_by_outlawtexan67.jpg?direct&400|}}

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|Generic HD Wiring Diagram ((photo by FE Head https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/52169-starter-problems?t=230142))|
{{:common:space100x5px.jpg}}{{:techtalk:ih:elec:generic_hd_wiring_diagram_by_fe_head.jpg?direct&600|}}

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|Ironhead CAD Wiring Diagram ('77) ((diagram by russzx6 https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/65022-wiring-diagram-in-autocad?t=411626))|
{{:common:space100x5px.jpg}}{{:techtalk:ref:elec:alt-diag-77-russzx6.jpg?600|}}



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