Question about Harley Davidson Motorcycles
1988 harley davidson fxr. was driving battery shorted out.blew headlight and taillight bulbs out and bike died.put in new battery and changed bulbs but have no spark.changed coil and still nothing
Posted by Anonymous on
I had same issue 94 for an it fried ignition module. Turn signal cancelater an all headliges an voltage regulator. Come ta find out stater plug was loose overchargeing battery then frying everything twice. So got expensive
Posted on Jan 29, 2019
Hi Anonymous, you may have fried your ignition module or pick up timer behind the plate on the cam cover, for a free wiring diagram, please visit the website below. Good luck and have nice day. firstname.lastname@example.org Harley Davidson Wiring Diagrams and Schematics
Harley Davidson Manuals Mark Workshop
Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/gregg_c0ec1df182c7330e
Posted on Jul 27, 2015
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Posted on Jan 02, 2017
I would check the coil first and see if it needs replaced .If it's new and you still have reciept ,take and get a replacement coil for the one you bought and make sure your wires coming out of everything have power be tracing the system to see if there might be something shorting.
Posted on Apr 27, 2009
SOURCE: no spark
alrighty, I had the same issue with my bike. It took days of tracing the issue with a volt meter and I discovered an intermittent short that would "fry" my coi. This made the bike not start and when I replaced the coil, because I had removed the old coil and moved the wires the issue disappeared for a short time. It is known that SOMETIMES when the coil is mounted the two wiresthat go to the coil somhow get stretched. This over time cause an intermittent short and the coil is rendered "dead". The Fix: 1.get a replacement coil. 2.you need 6 inches of #18 wire 3. two aluminum wire splicers and two aluminum circle fittings for the coil posts. 4.take off the old coil. 5.cut back the wires that go to the coil about an inch. 6. using the aluminum splicers splice the wires making them about 3 inches longer. 7.splice in the aluminum circle fittings. 8.mount the new coil. 9. fire the bike up. Enjoy riding.
Posted on Jun 06, 2009
properly, remove inspection cover on left side case. the wheel is marked. TDC and the proper just before TDC I believe. with a timing light... adjust plate till you see the proper timing mark. IF IT IS TOTALLY STOCK ...off hand, put the plate in the center of its adjustment... it will run there... you can adjust it slightly in either direction. usually it is slightly clockwise from center. when it starts right.. ride it. if it diesels.. back it off a little. it works.
Posted on Sep 11, 2009
If you have power going to the coil but no spark, you've got something wrong with the "triggering" circuit of you ignition system.
One other thing, if your engine is the TC88 engine, (first year of production for some models) it probably has a "compression sensor" on it. If you have no compression, you will not have any spark. If you have your plugs out of the engine, you have no compression. So, screw a set of plugs into the engine, leave another set in the wires and grounded against the engine to test the spark.
The "triggering system" uses the signal from the ignition timing sensor that is located in the "nose cone" of the engine. Check this wiring from the ignition unit's "Black box" to the sensor. I seem to remember a plug that plugs in for this unit.
I'm afraid that this is about the only help I can give you with a stock ignition unit as I usually work with either earlier igniton systems or aftermarket units. I have very little experience with "stock" Harley units.
Posted on Dec 20, 2009
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