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1973 R75/5 - electrical issues?
- schrader7032
- Posts: 9065
- Joined: Fri Oct 27, 2006 3:00 am
- Location: San Antonio, TX
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Re: 1973 R75/5 - electrical issues?
So make sure you measured the right part. I think the primary wiring is from the terminals on each coil. The secondary resistance would be from either of the terminals to the tower of the coil where the plug wire is.
'78 R100/7 '69 R69S '52 R25/2
Fast. Neat. Average. Friendly. Good. Good.
Re: 1973 R75/5 - electrical issues?
But - removed from the bike, both coils should measure the same. One of my coils is steady 1.7 ohms. The other bounces all over and won't settle. In my experience, that's the sign of a coil that's shorted. My guess is that one coil is bad. We'll see what happens when I get the new coils.
--My wife
- schrader7032
- Posts: 9065
- Joined: Fri Oct 27, 2006 3:00 am
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Re: 1973 R75/5 - electrical issues?
'78 R100/7 '69 R69S '52 R25/2
Fast. Neat. Average. Friendly. Good. Good.
Re: 1973 R75/5 - electrical issues?
I'm hopeful that new coils come and my electrical issue is gone. We'll see.
--My wife
Re: 1973 R75/5 - electrical issues?
Well, I was wrong. Ordered new coils and installed. Once I hooked up the battery, the fuse off of terminal 15 on the board blew immediately. I am at wits end.
I think I'm going to take the switch out as well as the terminal plate and see if that's where the problem is. I do not look forward to this, but I don't know where else to look.
I am unhappy.
--My wife
- schrader7032
- Posts: 9065
- Joined: Fri Oct 27, 2006 3:00 am
- Location: San Antonio, TX
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Re: 1973 R75/5 - electrical issues?
'78 R100/7 '69 R69S '52 R25/2
Fast. Neat. Average. Friendly. Good. Good.
Re: 1973 R75/5 - electrical issues?
So - that's the next phase. Rebuild the ignition switch, then install a new board, and re-wire the bucket. Hopefully that sorts it.
--My wife
Re: 1973 R75/5 - electrical issues?
Tabs BMW? Really?
Removed the old board. Getting those tabs apart was a pain. Found some sketchy wiring in the bucket, so I'm glad I did this. Getting the tabs off of the keyhole surround was also a pain. Good thing they sell a new spring for the sliding cover, becasue my fell apart when I was removing everything. Oh - and the sliding cover broke in half.
Surround was harder to get back on than off. I had to get another set of hands to hold down on it while I tapped the tabs back bent. When changing the key cylinder, I recommend getting the special tool that holds it all together until you get the circuit board back on - made that part way easier. Also - realized once I had the board back in that I left a critical part out, so I am now an expert at disassembly/re-assembly - having done it multiple times now.
Still have to re-run the wires from the harness and switches to the circuit board. But not today. And - hopefully this sorts my problem. We'll see. I will report back later.
--My wife
- schrader7032
- Posts: 9065
- Joined: Fri Oct 27, 2006 3:00 am
- Location: San Antonio, TX
- Has thanked: 3 times
- Been thanked: 36 times
Re: 1973 R75/5 - electrical issues?
'78 R100/7 '69 R69S '52 R25/2
Fast. Neat. Average. Friendly. Good. Good.