The Norfolk BroadsThe Norfolk Broads
Username Password
Norfolk Broads Weather

Mon, 11 Apr 2016 7:20 am BST- Light Rain
5 Day Forecast

Wind 2.0 mph @ 40°
48.0°F/8.89°C Humidity 93% Pressure 29.65 (S)

Welcome to The Norfolk Broads Forum
This is THE Worlds Largest Forum devoted to the Norfolk Broads, here you can discuss issues about the Norfolk Broads. Or just somewhere to chat with others interested in the Norfolk Broads area.

Please Help Support The Norfolk Broads Forum
OR

The Norfolk Broads Forum / Broads Boat Owners Q & A / Follow-up: Engine Wiring - Seamaster 813/BMC 1.8
login
join
Graphics Off
Search
Forum Members - Book your Hoseasons holiday today, Just call 0345 498 6296

This is a moderated forum Reply to this DiscussionReply to Discussion | Start new discussionNew Discussion << previous || next >> 
Posted By Discussion Topic: Follow-up: Engine Wiring - Seamaster 813/BMC 1.8

Similar Threads That Might Help :
Engine Wiring - Seamaster 813 with BCM 1.8| Control in Reverse: Seamaster 813| Seamaster 813 for sale| new canopy seamaster 813| new canopy seamaster 813|

-- Page: 1 2 3

book mark this topic Printer-friendly Version  send this discussion to a friend  new posts last

AndyH
Apr-18-2007 @ 9:05 PM                           Permalink
reply
edit
profile
send p.m.
Knows What A Cringle Is
Posts: 94
Joined: Mar 2006
AndyH
          

Add To Ignore List
No I don't think it's a relay - it's too light for one thing. The starter relay is mounted the other side of the alternator control unit.

Casper
Apr-19-2007 @ 8:20 AM                           Permalink
reply
edit
profile
send p.m.
Forum Regular
Posts: 373
Joined: Feb 2006
Casper
          

Add To Ignore List
Andy,

any chance of a photo of the article, we should be able to identify it for you then, someone on here will have one I am sure - and probably know what it is and does.

Alan

Alan & Gill

Antares_9
Apr-19-2007 @ 8:47 AM                           Permalink
reply
edit
profile
send p.m.
Been Posting For a Long Time
Posts: 1753
Joined: Jan 2006
Antares_9
          

Add To Ignore List
It may well still be a relay, some are very light and encased in an aluminium cylinder, not heavyweight enough for a starter but certainly enough for a bilge pump, stop solenoid or some domestic piece of kit long since removed. A previous owner may have wished to fit a lightweight switch or sensor that would not have carried the current required to operate it, or the resulting cable run may have caused a voltage drop that was unacceptable. Truth is , with old boats and disconnected bits you may never get to the bottom of it. If it is still connected you should be able to trace the cabling to the related components.

Meus stilus es pelagus testes

Cat philosophy:
Life was sweet for a broads ships cat

Dr-Diesel
Apr-19-2007 @ 12:54 PM                           Permalink
reply
edit
profile
send p.m.
Forum Regular
Posts: 430
Joined: Dec 2004
Dr-Diesel
          

Add To Ignore List
Andy,

I doubt it is a relay unless the casing is earthed. If it is not, it will have four terminals on it, an earth which connects to the internal coil, a switched live which also connects to the internal coil. It will then have a permanent live, which will normally be a heavier cable than the switched live (otherwise you are defeating the object). And finally you should have an equally heavy wire from the relay which goes to the component it controls.

It may be a control for the heater plugs but if you can send a picture it will clear it up.



Regards

Paul H

http://www.honeymob.co.uk

Antares_9
Apr-19-2007 @ 1:09 PM                           Permalink
reply
edit
profile
send p.m.
Been Posting For a Long Time
Posts: 1753
Joined: Jan 2006
Antares_9
          

Add To Ignore List
Being mounted on the side of the engine would be earth enough, unless I misunderstood the post.

"vertically mounted metal plate on the starboard side of the engine", no, it appears I didnt

Meus stilus es pelagus testes

Cat philosophy:
Life was sweet for a broads ships cat

This message was edited by Antares_9 on Apr-19-07 @ 12:13 PM

BroadAmbition
Apr-19-2007 @ 5:37 PM                           Permalink
reply
edit
profile
send p.m.
Mudplug Juggler
Posts: 11033
Joined: Jan 2006
BroadAmbition
          

Add To Ignore List
I reckon it's a flasher canister for the indicators!! Evil Grin

Sorry, Sorry,  Yes I know, I'm leaving via the back door head held low in shame  Blush   -  Griff

One of these decades we WILL finish Broad Ambition !!

Antares_9
Apr-19-2007 @ 7:40 PM                           Permalink
reply
edit
profile
send p.m.
Been Posting For a Long Time
Posts: 1753
Joined: Jan 2006
Antares_9
          

Add To Ignore List
It does sound a lot like one Ba, especially the "do not drop" ledgend, it can't be....... can it? Smile

Meus stilus es pelagus testes

Cat philosophy:
Life was sweet for a broads ships cat

AndyH
Jul-07-2008 @ 10:37 PM                           Permalink
reply
edit
profile
send p.m.
Knows What A Cringle Is
Posts: 94
Joined: Mar 2006
AndyH
          

Add To Ignore List
In reply to Dr Diesel on 19 April 2007 (or anyone else that knows)!

>> It may be a control for the heater plugs but if you can send a picture it will clear it up.

It was a very long time ago but happened to think of taking a picture whilst crawling around under the cockpit floor on Sunday...

The component in question is the one with a red ring around it. Any ideas?

Andy


Attached File
View Full Size Image

Ellaboat
Jul-08-2008 @ 3:04 PM                           Permalink
reply
edit
profile
send p.m.
Forum Regular
Posts: 941
Joined: Sep 2005
Ellaboat
          

Add To Ignore List
Andy,

It sounds very much like the "6RA" relay unit that is paired with your "4TR" Alternator Control Unit.
Electrically, when at rest all 3 spade terminals would read open circuit to each other (but one of them would give a resistance reading to the case).
It's purpose is circuit isolation (not higher current switching) so all the cables would be the same size.

If it does turn out to be the 6RA, removing any of the spade terminals (or lifting the case off the metal mounting) would result in loss of alternator output.

The terminals are usually marked C1, C2 and W2 (or W1) and voltages to check would be as follows:-

C1 =  Constant +12 volts DC
C2 =  Switched +12 volts DC
W2 =  +12 volts DC when ignition switch is on
Case (W1) = Negative

On the other hand, the square box on the other side of the 4TR could be the relay described above (with a 4th terminal instead of the case) Smile

Cheers,

E/boat Steve

This message was edited by Ellaboat on Jul-8-08 @ 3:13 PM

Ellaboat
Jul-08-2008 @ 3:20 PM                           Permalink
reply
edit
profile
send p.m.
Forum Regular
Posts: 941
Joined: Sep 2005
Ellaboat
          

Add To Ignore List
Another check is that the following would all be linked together:-

4TR terminal "+"
6RA terminal C2
Alternator terminal "F+"

E/boat Steve

Ellaboat
Jul-08-2008 @ 3:53 PM                           Permalink
reply
edit
profile
send p.m.
Forum Regular
Posts: 941
Joined: Sep 2005
Ellaboat
          

Add To Ignore List
When you see it on paper it's a really basic circuit (see attachment)

E/boat Steve


Attached File
View Full Size Image

PAGE: 1 2 3

Home Photo Gallery Days Afloat Contact Us
Chat Room Downloads Norfolk Broads @ Amazon Make My Logo
Shops & Businesses Members Gear Norfolk Broads @ EBay Holiday Calendar
Pub Guide Tide Tables SOS List Popular Threads
2017 Calendar Contest Make A Donation Links Hireboat Info
Norfolk Broads @ CafePress FAQ Broads Quiz Forum Events
Advertise With Us Forum Shop Boating Bits Stickys and FAQs Boating Bits Hirecraft List

 

 

 



Copyright © 2005 Y2KInternet, All Rights Reserved.