Question about 2001 Harley Davidson XL Sportster 883 Hugger

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Wiring diagrams bike will not fire, no fire to the coil, run switch is working....what next

Posted by Anonymous on


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  • Harley Davidson Master
  • 43,096 Answers

Hi Anonymous, when checking for spark the CKP needs to measure the compression bump in order to send the correct signal to the ICM/ECM so always check for spark with either a third plug grounded or lift the end of the plug boot 1/2 " off one of spark plugs that are in the head. and the usual suspects are:
1. Fuel tank empty
2. Fuel supply valve turned off.
3. Fouled spark plugs.
4. Engine flooded with gasoline as a result of over use of enrichner.
5. Fuel valve or filter clogged.
6. Vacuum hose to automatic fuel supply valve disconnected, leaking, or pinched.
7. Discharged battery, loose or broken battery connections.
8. Loose wire connection at coil, battery or plug between ignition sensor and module.
9. Spark plug cables in bad condition and shorting, spark plug cable connections loose,
or cables connected to wrong cylinders.
10. Ignition timing incorrect due to faulty ignition coil, ignition module, or sensors " Manifold Absolute Pressure" "Camshaft Position Sensor" "Crank Position Sensor" "Brake Apply Sensor
11. Engine lubricant to heavy ( winter operation )
12. Sticking or damaged valves or push rod wrong length.
13. Primary cam sproket spline sheared or missing spacer.
14. Security alarm system not disarming.
For a primary suspect please visit the website below: Good luck
Harley Davidson Wiring Diagrams and Schematics
Harley Davidson Sportster error codes and how to access them Set Change Override Transport Harley Security Alarm PIN Code No Key Fob...

Posted on Jun 14, 2015


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Posted on Jan 02, 2017

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SOURCE: need wiring diagram

basic diagram, from ign switch through the run/stop switch to the bottom term of the ign coil. Terminal on top of ign coil goes to ignition circuit breaker (used to be points and condensor, you would have solid state magnetic pickup) in nose cone, right side of engine below push rod tubes.

Posted on Dec 06, 2009

Mr BrokRench
  • 1623 Answers

SOURCE: have a bike not getting

make sure have 12 volts at the coil and check the ignition module.

Posted on Jul 21, 2011

  • 71 Answers

SOURCE: 1987 sportster 883,sometimes will not fire,sometimes fires right up,replaced coil and wires,sometimes just quits like turning off the key,and not start.

when it shuts off i would check to see if your on/of switch has continuity in the on position, if yes is your answer check the r/r = regulator rectifier it will give you stator symptoms when the stator may be functioning properly also just for giggles check your stator the procedures for checking also check the starter to make sure it is not sticking if it is sticking it will cause run ability problems

Posted on Oct 16, 2012

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Check your coils. The 2 coils operate 2 cylinders at a time. One coil cylinders 1&4 and the other coil 2&3 (hence only 1&4 firing). The easy way is to switch over the wiring to each coil at the loom side so coil number 1 is now wired with the wires that were fed to coil number 2 and number 2 with number 1. The HT leads to the plugs are not touched and remain as they are now. Fire up the bike and see if only the inner 2 cylinders now fire. If this is the case then the coil that is feeding the non-firing cylinders is suspect. It could be the coil itself or it could be the wiring that feeds the coil, only further investigation will determine, so get back to me and let me know the results.
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Need wiring diagram

basic diagram, from ign switch through the run/stop switch to the bottom term of the ign coil. Terminal on top of ign coil goes to ignition circuit breaker (used to be points and condensor, you would have solid state magnetic pickup) in nose cone, right side of engine below push rod tubes.

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