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techtalk:evo:elec01 [2019/12/18 09:42]
ixl2relax [5 Volt Sensor Supply]
techtalk:evo:elec01 [2020/05/11 00:14] (current)
hippysmack [5 Volt Sensor Supply]
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 Battery condition can be seen as the voltage of the battery after it has been charged. To verify that it is in a 100 percent fully charged condition, charge the battery and disconnect the charger. **Let the battery rest for one to two hours**, then check the voltage level. Battery condition can be seen as the voltage of the battery after it has been charged. To verify that it is in a 100 percent fully charged condition, charge the battery and disconnect the charger. **Let the battery rest for one to two hours**, then check the voltage level.
  
-AGM Batteries ​((2016 Sportster Owner'​s Manual)) +{{:​techtalk:​ref:​elec:​battery-chargelevel.jpg|}}((2016 Sportster Owner'​s Manual))((1998 Sportster Service Manual))
-^ Voltage Reading | 12.7 | 12.6 | 12.3 | 12.0 | 11.8 | +
-^ Percent Charged | 100% | 75% | 50% | 25% | 0% | +
- +
-Older-style Sealed Lead Acid Batteries ​((1998 Sportster Service Manual)) +
-^ Voltage Reading | 13.0 | 12.8 | 12.5 | 12.2 | 12.0 | +
-^ Percent Charged | 100% | 75% | 50% | 25% | 0% |+
  
 Be sure your multimeter BLACK Probe is properly grounded to the Battery Negative Post or to the frame. Be sure your multimeter BLACK Probe is properly grounded to the Battery Negative Post or to the frame.
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 Over the years, HD has grounded the Sportster electrical systems in a number of ways. Over the years, HD has grounded the Sportster electrical systems in a number of ways.
  
-In the early models (typically, 1993-earlier),​ **components were grounded to the frame** at a nearby point while power was distributed throughout the system on a minimal number of wires in the wiring harness. There could be as many as a dozen points on the frame used for grounding. The front lights & instruments ​were grounded thru a connecting strap between the fork risers ​& the handlebars.+In the early models (typically, 1993-earlier),​ **components were grounded to the frame** at a nearby point while power was distributed throughout the system on a minimal number of wires in the wiring harness. There could be as many as a dozen points on the frame used for grounding. The front turn signals (on the handlebars) ​were grounded thru a connecting strap between the fork riser bolts & the triple tree.
  
 {{:​techtalk:​evo:​elec:​86-93-handlebarground.jpg?​500|}}{{:​techtalk:​evo:​elec:​86-93-devicegrounds.jpg?​250|}}((http://​xlforum.net/​forums/​showthread.php?​t=2073777 - Pics from John Harper - Annotated by IXL2Relax)) {{:​techtalk:​evo:​elec:​86-93-handlebarground.jpg?​500|}}{{:​techtalk:​evo:​elec:​86-93-devicegrounds.jpg?​250|}}((http://​xlforum.net/​forums/​showthread.php?​t=2073777 - Pics from John Harper - Annotated by IXL2Relax))
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 | **2014-later CANbus Engine Control Module**\\ \\ ECM Connector 2 - Pin 9 is +5v Output (RED/White Wire)\\ ECM Connector 2 - Pin 7 is 5v Sensor Ground (BLACK/​White Wire) | **5v power is fed from ECM Connector 2 - Pin 9 to all of these connections:​**\\ VSS Connector 65B - Pin A (R/W Wire)\\ -- (VSS uses Powertrain Ground Point (BK/GN Wire)- Not 5v Sensor Ground)\\ JSS - Jiffy Stand Sensor Connector 133B - Pin 1 (R/W Wire)\\ -- Uses Powertrain Ground (BK/GN Wire)\\ ---- (This connector on all models may have an issue due to its location)\\ Passes Thru Engine Harness Connector 145A/B - Pin 8 (R/W Wire) to:\\ TMAP Sensor Connector 80B - Pin 3 (R/W Wire)\\ TPS Sensor Connector 88B - (2014 its on Pin 1 (later years its on Pin B)(R/W Wire))\\ \\ **The following devices are grounded thru the ECM on Connector 2 - Pin 7:**\\ ETS - Engine Temp Sensor - Pin B (B/W to TAN Wire)\\ Front O2S - Oxygen Sensor - (138A/B)Pin 4 - (B/W  to BLACK Wire)\\ Rear O2S - Oxygen Sensor - (137A/B)Pin 4 - (B/W to BLACK Wire)\\ Passes Thru Engine Harness Connector 145A/B - Pin 6 (B/W Wire)\\ TMAP - Temp/​Manifold Abs Pressure Sensor - Pin 1 - (B/W Wire)\\ TPS - Throttle Position Sensor - (2014 its on Pin 2 (later years its on Pin A) (B/W Wire))\\ \\ ECM Connector 1 & Connector 2 - Pin 10 are both listed as Sensor Grounds (BK/GN)\\ ---- These are General Grounds - They go to the Powertrain Ground Point | | **2014-later CANbus Engine Control Module**\\ \\ ECM Connector 2 - Pin 9 is +5v Output (RED/White Wire)\\ ECM Connector 2 - Pin 7 is 5v Sensor Ground (BLACK/​White Wire) | **5v power is fed from ECM Connector 2 - Pin 9 to all of these connections:​**\\ VSS Connector 65B - Pin A (R/W Wire)\\ -- (VSS uses Powertrain Ground Point (BK/GN Wire)- Not 5v Sensor Ground)\\ JSS - Jiffy Stand Sensor Connector 133B - Pin 1 (R/W Wire)\\ -- Uses Powertrain Ground (BK/GN Wire)\\ ---- (This connector on all models may have an issue due to its location)\\ Passes Thru Engine Harness Connector 145A/B - Pin 8 (R/W Wire) to:\\ TMAP Sensor Connector 80B - Pin 3 (R/W Wire)\\ TPS Sensor Connector 88B - (2014 its on Pin 1 (later years its on Pin B)(R/W Wire))\\ \\ **The following devices are grounded thru the ECM on Connector 2 - Pin 7:**\\ ETS - Engine Temp Sensor - Pin B (B/W to TAN Wire)\\ Front O2S - Oxygen Sensor - (138A/B)Pin 4 - (B/W  to BLACK Wire)\\ Rear O2S - Oxygen Sensor - (137A/B)Pin 4 - (B/W to BLACK Wire)\\ Passes Thru Engine Harness Connector 145A/B - Pin 6 (B/W Wire)\\ TMAP - Temp/​Manifold Abs Pressure Sensor - Pin 1 - (B/W Wire)\\ TPS - Throttle Position Sensor - (2014 its on Pin 2 (later years its on Pin A) (B/W Wire))\\ \\ ECM Connector 1 & Connector 2 - Pin 10 are both listed as Sensor Grounds (BK/GN)\\ ---- These are General Grounds - They go to the Powertrain Ground Point |
  
 +====== Tip For Hunting Down Short Circuits ======
  
 +If you are attempting to locate a short circuit, rather than continuing to replace fuses while looking for the
 +problem, you can use a test light in place of the fuse at the fuse block. ((HD Tech Tip #48 dated August 1998)) ​ Start removing one load at a time or
 +wiggle wires. When the light goes out, examine the wiring on the portion of circuit last disconnected for the
 +cause.
  
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