Question about Harley Davidson FLHTC - FLHTCI Electra Glide classic Motorcycles

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Fuse blows to the ECM when I hit the run switch, 05' FLHTCUI

I turn on the ignition switch, hit the run switch and the fuse blows to the ECM

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  • Harley Davidson Master
  • 314 Answers

For more information about your issue, please visit the websites below, and for specific information or questions, please feel free to contact me at motor@motorpartstore.com.
http://www.motorpartstore.com.Good luck and have a nice day.

Posted on Apr 11, 2016

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  • Harley Davidson Master
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Hi Randynsue, you have a dead short which is usually the easiest to find. Using a test light connected to the hot side of the blown fuse holder, start probing the wire leaving the fuse holder about an inch away the test light should illuminate, keep probing towards the ignition switch until the test light no longer illuminates you are now very close to the short. For more information about your issue, please visit the websites below, and for specific information or questions, please feel free to contact me at xlch@mail.com. Good luck and have a nice day.
Harley Davidson Manuals Mark Workshop

Posted on Sep 27, 2015

3 Suggested Answers

czaa
  • 4514 Answers

SOURCE: If I turn the main

u hav a flaw in wiring from a cut or deterioration creating a short--inspect harness well and buy a hd repair manual for your model

Posted on Aug 30, 2010

rzman
  • 148 Answers

SOURCE: 1999 harley ultra classic, ignition fuse blowing

Hi,,you have a shortage going on,,check the wires,also could have moisture in the switch.

Posted on Mar 24, 2011

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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Harley horns fail. Replace the horn. If this fault has happened at the same time as engine wont crank then problem with wiring. If not then check starter relay (grey one). Also check ignition switch. Are the head lights coming on when turned on? If so the ignition switch is o/k. Connect a voltmeter to horn to check horn circuit. Accessory fuse 15 Amp supplies horn circuit and brake light and turn signal circuits so if these are working fuse o/k. Ignition/start circuit requires system relay and ECM fuse to be o/k. If fuel pump operates when run switch is activated then system relay o/k. Check start relay and circuit to start button.

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Hello! Just because you changed an engine does not mean that something unrelated hasn't occurred... In the fuse box is the 10A fuse in the far left row...Third fuse down?....If it is that is the ECM ignition Fuse...Tracing from the ignition switch it is a Pink wire that goes to a 3A in-line fuse and changes color to Purple/White then on to the ECM...When the fuse blows is there battery on the Pink wire?...If not...Pull the blown fuse...Disconnect the main Battery terminal...Set multimeter to the X 10 scale...Place one lead on each side of the pulled fuse socket and the other lead to bare metal ground...Does either side read resistance to ground?...If it does turn the ignition key from off...To ACC,.. to start and finally hold on run...Does the ground go away in any of those positions? if it does I would suspect one of the ignition switch wires is touching ground...Hard to find...But if you alligator clip the meter in place and wiggle the ignition wires you may see it come and go...Indicating where you are moving the harness the bare wire is pinched to ground...
However...If the movement of the key does not produce a change...Remove the fuse box...Flip it over... identify the wire on the fuse that blows and trace it with meter in-place wiggling as you move through the harness until you find the bare spot touching ground...

An easier softer way is to identify the color of the wire that connects to the ECM IGN FUSE...It will be Red, or Purple/White and go to the ignition switch...Cut it on both ends and run a wire of the same gauge from point to point...Guru...Saailer

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I have a 05 Toro 44in ZTR with a 19HP Kawasaki engine with under 300 hours the main 30amp fuse keeps blowing when I turn on the ignition switch on. I noticed when I disconect the PTO switch the fuse dousnt...


sounds like your electric clutch is prob bad check to make sure wires are not bare touching something, the clutches do go bad eventually like any other electrical part, disc the pigtail and try fuse, if it blows then I would consider a clutch

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1 Answer

Trouble starting doesnt seem to want to fire


Check the fuses, I had one a while ago that kept blowing one of the ECM fuses. There are 2 ECM fuses one also sends power to the fuel pump too. Do you hear the fuel pump run when you turn the ignition switch to on? Just turn the key to the "on" position, not all the way to start, you should be able to hear the fuel pump run for about 3-5 seconds. I think it takes a 15 amp, I showed the owner which fuse it was and it would blow occasionally. One day it blew one right after another so he put a 30 amp in, he was out of 15's. I told him that was not a good idea. Anyway, that fixed it he drove it home and put a 15 amp fuse back in it, it's been good ever since.

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CHECK FOR IGNITION WIRES SHORT TO GROUND.I HAVE SEEN A BAD FUEL PUMP BLOW ECM FUSE.REMOVE THE FUEL PUMP FUSE DISABLE FUEL PUMP AND SEE IF FUSE KEEP BLOWING.

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Head light & spot lights quit working.


Check if there's (live + (positive) current coming to the headlight and the spot light once you turn them 'on' .
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If theres no current to the switch thn you have to trace it back to the fuse box and finally to the battery .
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1 Answer

Blows ignition fuse when key is turned on


Look for a grounded wire on the ignition switch or a break in the wiring leading to the fuse. Wiring system on motorcycles are a close system with only the battery being grounded to the frame. Any loose connections or breaks in the wires that will allow the current to jump to the frame with cause you tons of fun.

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