guzziriders.org - moto guzzi forum Homepage
Forum Home Forum Home > Technical > General Electrical issues
  New Posts New Posts RSS Feed - Relays for Big Blocks
  FAQ FAQ  Forum Search   Events   Register Register  Login Login

Relays for Big Blocks

 Post Reply Post Reply Page  <12
Author
Message
iansoady View Drop Down
Senior Member
Senior Member
Avatar

Joined: 23 Jul 2017
Location: Redditch
Status: Online
Points: 2402
Post Options Post Options   Thanks (0) Thanks(0)   Quote iansoady Quote  Post ReplyReply Direct Link To This Post Posted: 17 Feb 2019 at 11:02
Better?


Ian
1952 Norton ES2
1986 Honda XBR500
1958-ish Greeves/Triumph in progress
Back to Top
Ianboydsnr View Drop Down
Senior Member
Senior Member


Joined: 14 May 2014
Location: Cumbria
Status: Offline
Points: 831
Post Options Post Options   Thanks (0) Thanks(0)   Quote Ianboydsnr Quote  Post ReplyReply Direct Link To This Post Posted: 17 Feb 2019 at 11:03
I fitted mini relays to my first lm2, done in the headlight, with a fused supply straight from the battery, just connected the wires to the headlight as the trigger wore, then from the relay to the light,


Back to Top
TheWrongTrousers View Drop Down
Senior Member
Senior Member
Avatar

Joined: 05 Nov 2018
Location: Somerset
Status: Offline
Points: 658
Post Options Post Options   Thanks (0) Thanks(0)   Quote TheWrongTrousers Quote  Post ReplyReply Direct Link To This Post Posted: 17 Feb 2019 at 12:16
Yes thats better still. Thanks a million for this Ian and to all who have helped me with this point. When the time comes to tackle this, I now have a really good guide. 
Back to Top
Chris950s View Drop Down
Senior Member
Senior Member
Avatar

Joined: 03 Nov 2018
Location: Essex
Status: Offline
Points: 378
Post Options Post Options   Thanks (0) Thanks(0)   Quote Chris950s Quote  Post ReplyReply Direct Link To This Post Posted: 17 Feb 2019 at 12:18
Originally posted by iansoady iansoady wrote:

Better?

That is basically what I have done on my bike.

Chris and Karen - Essex
2011 Stelvio NTX, 1974 950S (750S replica nearly rebuilt!), 1966 Triumph T100SS 58 years young this year!
Back to Top
Brian UK View Drop Down
Moderator Group
Moderator Group
Avatar

Joined: 13 May 2014
Location: Surrey
Status: Online
Points: 17641
Post Options Post Options   Thanks (0) Thanks(0)   Quote Brian UK Quote  Post ReplyReply Direct Link To This Post Posted: 17 Feb 2019 at 12:44
I still think the way I did mine is simpler. Less frigging with the wiring.

Brian.

Better 5 minutes late in this world than years early in the next.
Back to Top
TheWrongTrousers View Drop Down
Senior Member
Senior Member
Avatar

Joined: 05 Nov 2018
Location: Somerset
Status: Offline
Points: 658
Post Options Post Options   Thanks (0) Thanks(0)   Quote TheWrongTrousers Quote  Post ReplyReply Direct Link To This Post Posted: 17 Feb 2019 at 15:00
On a related issue, I am going to have to replace some of the wiring on the bike. I can see that Gutsibits does a nice line in female and male molex plugs and sockets and new block connectors, but i need to know what amp rating wire i need to replace some of the wires that connect to the big 12 and 15 pin block connectors. 

It seems that getting the coloured wire is not a problem, but i need to know about the amp rating so i can choose the right wire. 

Anyone know the answer to this ?
Back to Top
Brian UK View Drop Down
Moderator Group
Moderator Group
Avatar

Joined: 13 May 2014
Location: Surrey
Status: Online
Points: 17641
Post Options Post Options   Thanks (0) Thanks(0)   Quote Brian UK Quote  Post ReplyReply Direct Link To This Post Posted: 17 Feb 2019 at 15:54
Vehicle Wiring Products also supply most things. Possibly not the original Molex connectors. This will be because newer versions are far better. Look at the Superseal range.
Probably got a better selection of wire too.

Regarding the current rating, it will depend on which circuit you are replacing. But always better to go bigger than smaller. All cables on the VWP site have their current rating listed.

Use the thin wall cable.


Edited by Brian UK - 17 Feb 2019 at 15:59
Brian.

Better 5 minutes late in this world than years early in the next.
Back to Top
TheWrongTrousers View Drop Down
Senior Member
Senior Member
Avatar

Joined: 05 Nov 2018
Location: Somerset
Status: Offline
Points: 658
Post Options Post Options   Thanks (0) Thanks(0)   Quote TheWrongTrousers Quote  Post ReplyReply Direct Link To This Post Posted: 17 Feb 2019 at 16:07
That looks like a great website Brian. Thanks for that. 
Back to Top
iansoady View Drop Down
Senior Member
Senior Member
Avatar

Joined: 23 Jul 2017
Location: Redditch
Status: Online
Points: 2402
Post Options Post Options   Thanks (0) Thanks(0)   Quote iansoady Quote  Post ReplyReply Direct Link To This Post Posted: 17 Feb 2019 at 16:13
I used to use VWP but more recently have gone for Autosparks. Same quality and range (although they don't do control cables) but cheaper. Eg thinwall 16 amp cable is £0.25 / metre from Autosparks; £0.38 from VWP. And I like the way Autosparks quote prices including VAT rather than excluding as VWP do.


For control cables and components I now use Venhill:






Edited by iansoady - 17 Feb 2019 at 16:21
Ian
1952 Norton ES2
1986 Honda XBR500
1958-ish Greeves/Triumph in progress
Back to Top
iansoady View Drop Down
Senior Member
Senior Member
Avatar

Joined: 23 Jul 2017
Location: Redditch
Status: Online
Points: 2402
Post Options Post Options   Thanks (0) Thanks(0)   Quote iansoady Quote  Post ReplyReply Direct Link To This Post Posted: 17 Feb 2019 at 16:16
BTW the only thing you have to do with my layout is to piggyback the cable going to the dipswitch to terminal 86 on relay 1, and reconnect the main beam cable to relay 2. Not frigging about I'd suggest.....

But each to their own.
Ian
1952 Norton ES2
1986 Honda XBR500
1958-ish Greeves/Triumph in progress
Back to Top
jefrs View Drop Down
Senior Member
Senior Member
Avatar

Joined: 12 Aug 2018
Location: West Berkshire
Status: Offline
Points: 333
Post Options Post Options   Thanks (0) Thanks(0)   Quote jefrs Quote  Post ReplyReply Direct Link To This Post Posted: 17 Feb 2019 at 19:24
Are the old italian light switches that flimsy? I seem to remember Laverda wouldn't work in the wet. 

But if the switches are man for the job and the wiring is up to it, as it was built, you don't need extra relays, just something else to draw more current and something else to go wrong. 

A quick shot of Electrolube Switch Cleaner is probably all that is needed to restore full working order.

Back to Top
Dave P. View Drop Down
Senior Member
Senior Member
Avatar

Joined: 12 Jan 2015
Location: Northants
Status: Offline
Points: 5573
Post Options Post Options   Thanks (0) Thanks(0)   Quote Dave P. Quote  Post ReplyReply Direct Link To This Post Posted: 17 Feb 2019 at 19:32
Dunno about flimsy but they are expensive to replace. Putting the main current through a relay can extend the life of the original switch considerably.
TO LIVE OUTSIDE THE LAW YOU MUST BE HONEST.

1971 V7 Special. 1972 850GT.
1970 T120 Bonnie. 2009 500 Bullet.
Back to Top
Brian UK View Drop Down
Moderator Group
Moderator Group
Avatar

Joined: 13 May 2014
Location: Surrey
Status: Online
Points: 17641
Post Options Post Options   Thanks (0) Thanks(0)   Quote Brian UK Quote  Post ReplyReply Direct Link To This Post Posted: 17 Feb 2019 at 21:52
On my Spada III, I went through all the switches and cleaned them, and the various connections in the wiring, but still was only getting just over 12 volts at the headlight bulb. Remember the original wiring goes up and down the bike, through the fusebox and switches. And the jury is still out on whether those switch contacts are up to taking the headlight current. Also the existing wire gauge is feeble to say the least.

Doing the mod as I did, which reduces the cable length and removes all switches from the circuit brought 14 volts to the headlight, and the difference in brightness was almost unbelievable.

So, no, I do not agree that a shot of electrolube is all that is needed. But electrolube will still help prolong the life of the switches.
Brian.

Better 5 minutes late in this world than years early in the next.
Back to Top
 Post Reply Post Reply Page  <12
  Share Topic   

Forum Jump Forum Permissions View Drop Down

Forum Software by Web Wiz Forums® version 12.03
Copyright ©2001-2019 Web Wiz Ltd.

This page was generated in 0.078 seconds.