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Author Topic: Electrical Checks  (Read 654 times)

Crossrodes

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Electrical Checks
« on: October 10, 2010, 10:14:02 AM »
After not doing much on Ugly Betty (my '79 R65) I'm back into the restoration for now.  I have read a few posts on this board where people have burnt up their wiring after having the bike apart.  So I want to make sure this doesn't happen to Betty.  

Using a wiring diagram for the '79 that I got on this board, yesterday I started tracing out the wiring using an Ohmmeter.  This is a painfully slow process.  Has anyone done this and do you have any tips to speed up the process?
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Offline Bob_Roller

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  • Mt. Olympus Resident
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Re: Electrical Checks
« Reply #1 on: October 10, 2010, 10:31:00 AM »
There's no quick method for this .

About the only circuit that isn't protected by a fuse, is the headlight, so pay particular attention to this circuit .
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'81 R65
'82 R65 LS
'84 R65 LS
'87 Moto Guzzi V65 Lario
'02 R1150R
Riding all year long since 1993 .
I'll give up my R65, when they pry my cold dead hands from the handlebars !!!!!

Crossrodes

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Re: Electrical Checks
« Reply #2 on: October 10, 2010, 12:33:55 PM »
Thanks Bob.
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Offline montmil

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Re: Electrical Checks
« Reply #3 on: October 11, 2010, 11:11:54 AM »
Quote
... I have read a few posts on this board where people have burnt up their wiring after having the bike apart.  So I want to make sure this doesn't happen to Betty...

Some circuits can be checked with the negative battery terminal disconnected. Especially if it's a simple continuity check. Do remove the neg cable before removing the engine's front cover. Cover contact with an always hot terminal on the diode board will cause smoke.

Be sure to check the wire connectors for corrosion. Nature's on-off switch. ;)

No fast way to this tedious job. Try going too fast and you'll miss something for sure. One last thing... even if the OEM ceramic fuse and fuse holders look shiny clean, they can still be bad. GTTSTPI.

Monte
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Monte Miller
Denton, TEXAS
1978 BMW R100S
1981 BMW R65
1983 BMW R65
1995 Triumph Trophy
1986 VW Cabriolet

balibeemer

  • Guest
Re: Electrical Checks
« Reply #4 on: October 11, 2010, 09:05:40 PM »
As everybody says, there are no shortcuts, I did a complete check a couple of days ago and after printing out a circuit diagram, discovered that I had 3 extra relays! It appears that they were for a 'dee-daa dee- daa' 2 tone horn, flashing blue lights and something else I am not too sure about. Ergo, my boxer is an ex european POLICE machine!
Anyway, after removing the extra relays and about 2 kg. of unconnected and useless wiring, I went through the entire system, using up 2 cans of contact cleaner, a couple of grams of solder,  a few meterrs of heat-shrink insulation etc. Apart from the amputation of the extra relays, the entire process took about 10 hrs. Since I am in the corrosive tropics, I also used dielectric grease on every switch, contact etc. Good for another year I think!
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