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first wiring question
first wiring question
Studying the diagram, it shows the red wire feeding the main switch, but also a green / red wire from the same terminal feeding the right dimmer switch cluster.
This would mean that the diimmer switch is hot full time. What am I missing?
- schrader7032
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Re: first wiring question
'78 R100/7 '69 R69S '52 R25/2
Fast. Neat. Average. Friendly. Good. Good.
Re: first wiring question
In my own research, looking at the manuals I have, it’s not clear in the Haynes manual, but is in the Clymer, the /5 headlight switch has a “push to flash” feature that activates the high beam. In the /5 wiring set-up, it does appear this is possible with the bike turned off. Back in the day when headlights weren’t required, this set-up makes more sense, with the ignition/headlight switch “down” and “straight”, the headlight relay isn’t powered, in the headlight on position, the headlight relay provides power for the lights.
The Clymer manual has two diagrams, one for early /5s without fuses and one for later /5s with fuses. It appears as though BMW changed the wire colors. In the without fuse bikes, your green-red wire is solid red, that fits better with terminal 30 always being “hot”.
Good Luck!
Seattle
Re: first wiring question
I do like the way the Germans number the terminals to make it easier to know where each wire goes.
- cbclemmens
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Re: first wiring question
On the old BMWs the dimmer switch was set up so the headlight could be used as a signal lamp for Morse code with the engine off. I'm told that was for signaling submarines but there were probably other uses. Anyway there was a hot wire going to the dimmer switch. Pushing the switch down would turn the high beam on for as long as you hold it down (the flasher), center position is low beam and up is high beam, but only with the ignition on.
Craig
- cbclemmens
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- cbclemmens
- Posts: 223
- Joined: Sun Apr 25, 2021 2:21 pm
- Location: Apollo, PA
- Been thanked: 6 times
Re: first wiring question
Craig
- cbclemmens
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- Joined: Sun Apr 25, 2021 2:21 pm
- Location: Apollo, PA
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Re: first wiring question
Having pulled the switch, there is a good chance I will be buying a new switch or wiring up something original.
Thanks