Register
Join Cyclechaos! Motorcycles Wiki Forum Recent Posts Search Today's Posts Mark Forums Read
Cycle Chaos > Cyclechaos Forums > General > Motorcycle Repair > Trouble with my '79 Honda CM400T

Trouble with my '79 Honda CM400T

This is a discussion on Trouble with my '79 Honda CM400T within the Motorcycle Repair forums, part of the General category; Not sure what's up with this thing. The electrical system was working. Now it's not. The bike runs fine after ...


Reply
 
LinkBack Thread Tools
Old 09-12-2006   #1
Junior Member
 
Join Date: Jan 2009
Posts: 10
Default Trouble with my '79 Honda CM400T

Not sure what's up with this thing.

The electrical system was working. Now it's not. The bike runs fine after starting, but I have no lights, no horn, and no electric start. Here's what I did:

Hooked up the battery to the multimeter and it's reading 13volts, and I noticed it bubbling with the engine running.

Fuses all looked good. Tried a different main fuse and still no change.

I figure my alternator is working since the bike can idle. I don't know if a broken regulator/rectifier can cut your power. I thought the lights could at least run off the battery, but they don't.

Checked my wiring and it looks okay, a little beat up, but okay. I'm trying to look at a wiring diagram, but I get lost in the regulator/rectifier area. A little help with this would be much appreciated.
Arggg is offline   Reply With Quote
Old 09-14-2006   #2
Junior Member
 
Join Date: Dec 2008
Posts: 20
Default Trouble with my '79 Honda CM400T

Fuses can look good but be bad. Replace 'em one at a time and see what happens.

See if the affected components share a common ground.

Oh yeah, and cdg will tell you to clean and dress the points. :)

Kidding. Whatever advice cdg offers, take it.
Lovely is offline   Reply With Quote
Old 09-15-2006   #3
Junior Member
 
Join Date: Jan 2009
Posts: 10
Default Trouble with my '79 Honda CM400T

I test my fuses with an ohmmeter. I also check the voltage going across the fuses. Main fuse has voltage, the other ones have nothing.

I believe my issue is with a bad regulator. I tested my battery with the engine running and I was getting 18volts at the battery.
Arggg is offline   Reply With Quote
Old 09-16-2006   #4
Junior Member
 
Join Date: Nov 2008
Posts: 7
Default Trouble with my '79 Honda CM400T

Yeah, that's bad. Should be in the neighborhhod of 14VDC.
meltonmagnascoutgroup is offline   Reply With Quote
Reply

Bookmarks

Tags
cm400t, honda, trouble

Thread Tools

Posting Rules
You may not post new threads
You may not 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


Similar Threads
Thread Thread Starter Forum Replies Last Post
Vertically Challenged Newbie... Jordan Roach New Riders 10 06-26-2011 12:02 AM
For Sale 2009 Kawasaki Ninja 500R....$3000 Onlinebike Wanted / For Sale 0 04-19-2009 08:08 PM
1980 honda cm400t Dawg Honda 9 03-06-2008 05:39 PM
1979 honda cm400t - need help bhscarlett Honda 1 03-16-2007 07:15 PM
4 corners USA tour Jacee Motorcycle Discussion 3 09-09-2006 03:55 AM


All times are GMT -5. The time now is 01:07 PM.


Powered by vBulletin®