another Fl problem - Honda RC51 Forum : RC51 Motorcycle Forums
 2Likes
  • 1 Post By Koben Chang
  • 1 Post By SubSailor
 
LinkBack Thread Tools Display Modes
post #1 of 6 (permalink) Old 10-14-2017, 05:01 PM Thread Starter
Junior Member
 
Join Date: Sep 2017
Posts: 9
Mentioned: 0 Post(s)
Quoted: 1 Post(s)
another Fl problem

hello all, i think i read every fl post i could find but didnt find the excact one. 2001 rc51 sp1. been running like crud, sometimes wont start or turnover. just a click then lights out. found a loose ground wire, tightened it and went to test service connector again. i had previously cleared the codes, now when i turn key on with or without the service connector jumpered i get a solid light, no blinks. so if that is an accurate code is there a way to check for an open or short in the mil wire and/or test for a faulty ecm? thanks
Oly420 is offline  
Sponsored Links
Advertisement
 
post #2 of 6 (permalink) Old 10-14-2017, 10:51 PM
Junior Member
 
Join Date: Oct 2017
Location: South Florida
Posts: 11
Mentioned: 0 Post(s)
Quoted: 2 Post(s)
I can say coming from a VFR800 that faulty grounds will wreck havoc on the FI system. Take all plastics off and 1st go and clean with a wire brush all ground connections. Then one at a time pull each connector and check for a solid connection. Start there.
DannyBoy likes this.
Koben Chang is offline  
post #3 of 6 (permalink) Old 10-16-2017, 02:35 PM Thread Starter
Junior Member
 
Join Date: Sep 2017
Posts: 9
Mentioned: 0 Post(s)
Quoted: 1 Post(s)
ok, should have some time tonight so ill let you know if I find anything. thanks
Oly420 is offline  
 
post #4 of 6 (permalink) Old 10-17-2017, 08:42 PM
Moderator
 
SubSailor's Avatar
 
Join Date: Oct 2008
Location: Sarasota, FL
Posts: 6,470
Mentioned: 24 Post(s)
Quoted: 89 Post(s)
Many electrical problems start with corrosion of electrical contacts, from rain or humidity.
This can especially be true with high current contacts, such as alternator, starter relay, battery posts, etc.

When I had to replace my main wiring harnesses due to prior owner bastardization, one thing I noticed were a plethora of "green" contacts from corrosion.
Whenever a contact becomes corroded, it creates a resistive element across the contacts.

For low power components, it decreases the current, which might affect operation.
For high power components (alternator, starter relay, starter motor, etc.), the added resistance creates heat, which may cause overheated contacts or melting. For battery posts or main ground lead, it can cause charging issues.

I bought a tube of dielectric grease at an auto parts store (one 5 oz. tube lasts forever) and put a dab into every electrical connector on the bike. Including all connectors, battery posts, ground leads, etc.

If it flows electrons, it got dosed. Since then, I have had zero electrical issues.
It is dirt cheap insurance.
DannyBoy likes this.

Last edited by SubSailor; 10-17-2017 at 08:44 PM.
SubSailor is offline  
post #5 of 6 (permalink) Old 10-18-2017, 07:22 PM Thread Starter
Junior Member
 
Join Date: Sep 2017
Posts: 9
Mentioned: 0 Post(s)
Quoted: 1 Post(s)
that sounds like a good tip, ty. ive been going thru the wires. no green corrosion so far, just dust(live on dirt road). what did you use to clean the connector pins? or is that even necessary? getting ready to start checking for proper continuity and resistance
Oly420 is offline  
post #6 of 6 (permalink) Old 10-18-2017, 07:52 PM
Moderator
 
SubSailor's Avatar
 
Join Date: Oct 2008
Location: Sarasota, FL
Posts: 6,470
Mentioned: 24 Post(s)
Quoted: 89 Post(s)
Quote:
Originally Posted by Oly420 View Post
that sounds like a good tip, ty. ive been going thru the wires. no green corrosion so far, just dust(live on dirt road). what did you use to clean the connector pins? or is that even necessary? getting ready to start checking for proper continuity and resistance
Since I had to replace the harnesses on the RC51, all the contacts were new/pristine. The dielectric grease helps keep them that way.
On my other bikes, I just disconnected/reconnected several times to rub/polish the surface oxidation off prior to applying the dielectric grease.
SubSailor is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Honda RC51 Forum : RC51 Motorcycle Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome