electrical problem - SailNet Community
 
LinkBack Thread Tools
post #1 of 7 Old 10-10-2010 Thread Starter
Junior Member
 
Join Date: Aug 2010
Posts: 12
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
 
electrical problem

i have a yanmar 37 hp with instrument panel with shut off button. at times my panel seems to disconnect and gauges go dead. i just realized when this happens my alternator doesn't charge batteries. i am assuming there is a loose connection or ground but am wondering where to start. any comments appreciated, thanks
captkirb is offline  
Quote Quick Reply Share with Facebook
Sponsored Links
Advertisement
 
post #2 of 7 Old 10-10-2010
Member
 
Join Date: Mar 2010
Location: SF - South Bay
Posts: 593
Thanks: 1
Thanked 22 Times in 22 Posts
Rep Power: 7
 
As a start, I would begin to trace wires and develop a rough wiring chart for the boat. A camera, sketchbook and patience helps. I am doing the same thing myself, and in the process have found 3 basic wiring problems - 2 of which were unrelated to the problem I was diagnosing!

Also, if you don't have it already, Yanmar should have a wiring diagram available which will help.

Once you have a rough idea of where the wires go and what they are supposed to do, your ammeter/voltmeter becomes your best friend; just work methodically. But I am betting that during your charting phase you'll find a loose connection.

Not sure of your experience level, but Nigel Calder's book is a good place to start for advice.
paul323 is offline  
Quote Quick Reply Share with Facebook
post #3 of 7 Old 10-10-2010
Senior Member
 
CrazyRu's Avatar
 
Join Date: May 2007
Posts: 452
Thanks: 2
Thanked 0 Times in 0 Posts
Rep Power: 10
 
Quote:
Originally Posted by captkirb View Post
i have a yanmar 37 hp with instrument panel with shut off button. at times my panel seems to disconnect and gauges go dead. i just realized when this happens my alternator doesn't charge batteries. i am assuming there is a loose connection or ground but am wondering where to start. any comments appreciated, thanks
I assume that all gauges go dead. Are other electric devices (lights, electronics) still working?
If so it is most likely ground wire for the panel. All wires from the panel go into single harness. it is terminated at a connector(or two). All wires at the engine side go into similar bundle and have corresponding connector(or two). Technically speaking, you can just unplug the panel from the engine by pulling this connector apart. Now, trace a ground wire from engine's side connector. It most likely stands out and goes to some bolt on the engine. Check this bolt. It is most likely corrosion at this point. Or just find all ground connections in your electric system and clean them all.

CR
s/v NEMO - Freedom 28 Cat Ketch, centerboard
CrazyRu is offline  
Quote Quick Reply Share with Facebook
post #4 of 7 Old 10-10-2010
Senior Member
 
mitiempo's Avatar
 
Join Date: Sep 2008
Location: Victoria B.C. Canada
Posts: 7,740
Thanks: 0
Thanked 108 Times in 99 Posts
Rep Power: 9
   
Or a corroded connection on the harness connector itself. As posted there may be more than one. These connectors are often a problem.

Brian
Living aboard in Victoria Harbour
mitiempo is offline  
Quote Quick Reply Share with Facebook
post #5 of 7 Old 10-12-2010
Senior Member
 
Join Date: Dec 2003
Posts: 1,622
Thanks: 1
Thanked 34 Times in 33 Posts
Rep Power: 13
 
I traced a loss of power to the instrument pod this weekend to a 30 amp inline fuse on a 27 hp Yanmar. The fuse was taped into the wiring harness on top of the starter/solenoid, you could make and break the connection by moving the thing around. On schematic it usually shows the power source for pod as connected to
Quote:
fused ignition circuit
but doesn't show you where it might be. I was tracing the positive power wire with a test light.

"Just call me TB"
capttb is offline  
Quote Quick Reply Share with Facebook
post #6 of 7 Old 10-14-2010
Junior Member
 
Join Date: Oct 2010
Posts: 11
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
 
Why don't you just try testing the altenator with a voltameter, or wire brushing your battery connections. As an electrition i can tell you that wires alway go wrong at connections if the wire insulation is intact. Do yourself a favor and do the little things before the hard ones.
mroman33711 is offline  
Quote Quick Reply Share with Facebook
post #7 of 7 Old 10-14-2010
Special Delivery
 
speciald's Avatar
 
Join Date: Mar 2007
Location: live on boat
Posts: 661
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 10
 
Send a message via Skype™ to speciald
Yes, they hid that fuse quite well. I had one of those holders come apart and suddenly the boat wouldn't start. It took me a while to find the problem. When it happened again that was the first place I looked. I taped it heavily after the second time.
speciald is offline  
Quote Quick Reply Share with Facebook
Reply

Quick Reply
Message:
Options

By choosing to post the reply above you agree to the rules you agreed to when joining Sailnet.
Click Here to view those rules.

Register Now



In order to be able to post messages on the SailNet Community forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
Please note: After entering 3 characters a list of Usernames already in use will appear and the list will disappear once a valid Username is entered.


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









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Similar Threads
Thread Thread Starter Forum Replies Last Post
Help, wierd electrical problem Sanduskysailor Electrical Systems 6 07-11-2010 07:01 PM
Charging and Electrical Problem johnnyx Electrical Systems 8 06-29-2010 09:33 AM
Electrical Problem - Newbie Not Sure Where to Start wolfmt Gear & Maintenance 32 07-14-2008 09:17 AM
Electrical draw problem sailnaway Gear & Maintenance 1 12-13-2004 01:24 PM
Funny Electrical problem Bruceo1 Gear & Maintenance 2 12-15-2003 06:01 AM

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 On
Trackbacks are On
Pingbacks are On
Refbacks are On

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