Join the C34 Association Today!
[C34 Home] [C34Tech Notes] [C34 Tech Wiki] [Join!]
Please login or register.
Advanced search  

News:

Pages: [1]   Go Down

Author Topic: M 35BC Electrical draw  (Read 282 times)

0 Members and 1 Guest are viewing this topic.

John Langford

  • Forum - Petty Officer 1st Class
  • *****
  • Karma: 5
  • Posts: 433
    • View Profile
M 35BC Electrical draw
« on: October 30, 2018, 04:35:34 PM »

With everything off at the electrical panel, my monitor shows a 6 amp draw when the engine key switch is turned to the first position (engine instrument panel powered up, buzzer out of commission and glow plugs not engaged). Would the panel draw that much or is something else going on? Any suggestions?
Logged
Cheers
John
"Calypso"
MkII, #1431

KWKloeber

  • Forum - Master Chief Petty Officer of the Navy
  • ********
  • Karma: 32
  • Posts: 3343
  • "Positive Impact" 1984 C-30 #3573 trbsfk M-25
    • View Profile
Re: M 35BC Electrical draw
« Reply #1 on: October 30, 2018, 05:11:54 PM »

John if you rely on the schematic, with key on you would be powering the alarm V+ and (if the oil Sw failed in the closed position) the fuel pump and 1k resistor to ground (0.1 a).  The gauges and lights should be a very low draw.m. Unless Iím missing something not so obvious you should see very low amps. 6a is like one glow plug.
 
Logged
Twenty years from now you'll be more disappointed by the things you didn't do, than by the ones you did.
So throw off the bowlines.  Sail away from the safe harbor.  Catch the tradewinds in your sails.
Explore.  Dream.  Discover.   -Mark Twain

mainesail

  • Forum - Chief Petty Officer
  • ******
  • Karma: 37
  • Posts: 655
    • View Profile
    • MarineHowTo.com
Re: M 35BC Electrical draw
« Reply #2 on: October 31, 2018, 03:50:22 AM »

Depending upon the alternator it could be the field being driven to full field by the alt excite circuit. Clamp the alt feed to test..
Logged
-Maine Sail
Casco Bay, ME
Boat - CS-36T

https://marinehowto.com/

KWKloeber

  • Forum - Master Chief Petty Officer of the Navy
  • ********
  • Karma: 32
  • Posts: 3343
  • "Positive Impact" 1984 C-30 #3573 trbsfk M-25
    • View Profile
Re: M 35BC Electrical draw
« Reply #3 on: October 31, 2018, 09:52:39 AM »

John

Sometimes somethingís right there to smack me in the face and I miss it!  Yes your setup will excite the alt with the key on, whether the oil switch is good or bad. That circuit comes off the hot side of the oil sw (see the schematic.)

http://c34.org/bbs/index.php?action=dlattach;topic=9927.0;attach=8144;image

Rod, how much current might that pull?
Logged
Twenty years from now you'll be more disappointed by the things you didn't do, than by the ones you did.
So throw off the bowlines.  Sail away from the safe harbor.  Catch the tradewinds in your sails.
Explore.  Dream.  Discover.   -Mark Twain
Pages: [1]   Go Up