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Old 02-16-2013, 12:19 PM   #421
backdrifter OP
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Location: Belleville, IL
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Scratch that last question - I found this photo that answered my questions. I did a quick check and everything looks OK. I'll have to open the headlight again and check all the wiring there. If that seems to check out, then I may need to consider a new starter relay (though it was working before the tear down).

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1973 BMW R60/5:
http://www.advrider.com/forums/showthread.php?t=608166
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Old 02-16-2013, 12:29 PM   #422
georgesgiralt
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Before buying a new starter relay, try to trace the fault.
Take the wire I forced you to make before, and put he +12V at the output of the starter relay which should go to the starter. If the wire between the starter relay and the relay is sound, the starter motor should turn and drive the flywheel.
The try to energize the starter relay itself with the same wire; this way you will check the starter relay itself.... ETC ETC...
This method of fault tracing is often used in electronics where you inject a signal in the path it should follow going from the final destination to the source to find the stage at fault...
Here, it will also help you check the wiring because you'll have to find which wire to energize...
Before I leave, tell me, you had the starter motor running and cranking the engine with the wire on the spade terminal and the B+ ? And not only a "klonk"
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Old 02-16-2013, 02:05 PM   #423
backdrifter OP
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I had only waited to hear the "klonk" of the solenoid last time, but I just went out and tried again, and sure enough when connecting the spade and the B+ terminal with a wire the starter motor engaged, and it turned the engine over. It was actually pretty exciting to hear the bike turn over for the first time in two years!

But alas, still no starter button.
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1973 BMW R60/5:
http://www.advrider.com/forums/showthread.php?t=608166
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Old 02-16-2013, 02:53 PM   #424
georgesgiralt
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So the starter is working fine.
Tomorrow, try to trace the fault either to a bad component or to the wiring.
Try to add a fuse like 8Amps in series with your tracing wire in order not to set fire on the bike if "something wrong" happens...
You are near the goal ! Keep on !
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Old 02-17-2013, 02:00 AM   #425
rat110
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Keep going mate!!
Fantastic job on this bike. Keep at the problems! I want to see a video of this bike when it starts for the first time!
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Old 02-17-2013, 11:33 AM   #426
enzorover
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My suggestion...
Stop using a jumper wire and the battery to trace wires!
Go get a multi meter. There should be a continuity function on it somewhere. When you touch the meter leads together the meter should beep.
You should be able to pick one up for $15 to $1500.
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Old 02-17-2013, 01:29 PM   #427
georgesgiralt
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enzorover,
I do usually agree with you. But in this particular case, I don't. Why ? because a continuity test with an hyper sensitive equipment will see through oxidized wires. And having a wire let pass a few microamps is not the same as the same wire apt to pass through 10 A to energize a starter's solenoid.
This is why I told him to use a positive, fused, wire.
We are not only looking at false wiring, we are looking at bad wires also.
But you're right, a multimeter is the safest way to go, normally.
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Old 02-17-2013, 09:52 PM   #428
enzorover
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Quote:
Originally Posted by georgesgiralt View Post
enzorover,
I do usually agree with you. But in this particular case, I don't. Why ? because a continuity test with an hyper sensitive equipment will see through oxidized wires. And having a wire let pass a few microamps is not the same as the same wire apt to pass through 10 A to energize a starter's solenoid.
This is why I told him to use a positive, fused, wire.
We are not only looking at false wiring, we are looking at bad wires also.
But you're right, a multimeter is the safest way to go, normally.

Good point.
Since it worked before the rebuild I was just assuming there was a simple wiring issue.
Yeah, tracking electrical demons through 40yr old wires sucks.
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Old 02-18-2013, 07:44 AM   #429
backdrifter OP
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Thanks guys. I got frustrated and didn't want to work in the cold garage on Sunday, so I haven't made any more progress. I'll give it another shot soon.

I truly believe something is just wired incorrectly. We now know the starter motor and solenoid work beyond a doubt. The starter relay was brand new when I bought it two years ago (I bought it because I had fried the old one by trying to jump the bike and grounding out on the frame), and it worked before I took the bike apart. I have no reason to believe that it shouldn't still work now.

That leads me to believe wiring, and I'm already suspicious of the right hand/starter switch wiring because mine was from an older 1974 model and had wires that the 1973 bikes and circuits didn't have or need. I'm guessing I did something funky when wiring the right hand/starter switch. I'll take another look soon.

Thanks for all of the help!
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"We are very good at preparing to live, but not very good at living."
-Thich Nhat Hanh

1973 BMW R60/5:
http://www.advrider.com/forums/showthread.php?t=608166
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Old 02-18-2013, 10:15 AM   #430
georgesgiralt
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Keep on !
You are so close to the goal, now !
It is a matter of thinking and a few minute work.
If you have the schematic, and a multimeter you can find which wire comes out the right hand switch and comes from the starter button. Then you will be able to wire it properly...
If you remove the right hand switch from the bike, you can work this out in the comfort of the house. (and can post questions or get schematics ) from the internet... to compare from...
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Old 02-18-2013, 12:36 PM   #431
Rinty
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Just found this thread. Great story, and glad you got your title.

When you eventually pass this beautiful bike on to your kids, they will know there is a lot of "you" and Papa in it. Also, you could print out this thread, put it in a three ring binder, and they will have the whole story.
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Old 02-18-2013, 07:37 PM   #432
Tin Woodman
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You're on the threshold of success - best of luck!
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Old 02-18-2013, 09:12 PM   #433
Flipczak
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"That leads me to believe wiring, and I'm already suspicious of the right hand/starter switch wiring because mine was from an older 1974 model and had wires that the 1973 bikes and circuits didn't have or need. I'm guessing I did something funky when wiring the right hand/starter switch. I'll take another look soon."

I think your on the right track. The '74 model has a starter cut-off switch. The clutch lever has to be pulled in for the starter to engage. This may help http://www.p-thomas.com/shared/BMW/7...0%20Wiring.pdf
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Old 02-21-2013, 03:55 PM   #434
Tin Woodman
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just a thought

With ignition switch on, do the plugs spark when you kick the engine over manually with the kick starter?
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Old 02-24-2013, 05:30 AM   #435
Paul_Rochdale
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I think the fault lies with the wheel rims. Strip off the black powdercaoting and polish the rims. It'll be sure to fire up first time
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