Question about Motorcycles
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Posted on Jan 02, 2017
SOURCE: honda xl 100 1982 wiring problem
As long as your battery has tested good, and it is fully charged, the next thing to look at is your electrical ground. Clean the battery terminals with some emory cloth and also shine up the ends of the battery wires that attach to the battery. Then trace the black and the red wiress to the other end and clean them with emory cloth. chances are that corrosion has made a connection poor resulting in subpar flow of electricity to your signals and horn. Once you have checked and cleaned the battery wires test and see how your signals and horn are working. If they are still weak then you need to open up the signals and the horn and clean up the connections there. get back and let me know how you make out. I know we can solve your problem.
Posted on May 27, 2009
Probably time for a new battery. But first, check to be sure that water covers the top of the battery plates. Add water if needed.
Posted on Aug 17, 2009
may have burnt a wire inside the wiring loom, use multi meter to check each wire continuity, or perhaps jump a wire from + battery to the positive horn wire.
use a fuse on the jump wire in case of short.
If this work then definate break in loom
Posted on Apr 10, 2010
If all your instruments works fine then just check if any loose connection can be found. Just 2b safe.
The other thing is NEVER connect your battery while engine is running.
Posted on Apr 13, 2010
Sounds to me like you've got a security system problem. It's strange that you have power to the switch and fuses and then it stops. You do have power to the fuses don't you. You said you had continuity but you didn't say you had power. I've looked at the latest schmatic that I've got (1999-on) and I don't see anything that would stop everything from working on your bike. Now, Harley may have changed something and my schematic doesn't show it but I would think you would have something showing that the security system had everything locked out. Sorry I couldn't help.
Posted on Jun 07, 2010
Tips for a great answer:
If the test lamp illuminates, refer to the Horn Test.
Ignition OFF, disconnect the inline harness connector C275. Ignition ON, test for B+ between the horn relay control circuit terminal B and ground.
If less than B+, test the control circuit for an open/high resistance. If the circuit tests normal, replace the underhood fuse block.
Momentarily connect a 3-A fused jumper wire between the control circuit terminal B and ground. The horns should work.
If the horns do not work, replace the underhood fuse block.
If all circuits test normal, test or replace the horn switch
The PCB relay horn system consists of the following components:
Horn PCB relay
Body control module (BCM)
HORN fuse 15 A
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