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Discussion Starter · #1 ·
My cb175 1971. everything but horn and starter work. I have gone through as many wires as I know to check continuity. all good. I have checked the switches on horn and starter. All good. When I jump the starter switch it does run starter. Would that indicate a bad starter switch and would that cause the horn and starter switches to fail?

Help Please
LGR
 

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Sounds more like no ground to the handlebars. Don't know for sure if the 175s came with a ground wire from the upper triple clamp (top bridge) to the handlebar mounts in the case of rubber mounts, but adding one would solve the missing ground issue it sounds like you have
 

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Discussion Starter · #5 ·
Can someone show me where that ground should be? I did run a ground from horn switch to frame. It works. Would like to put back as original if possible.
Thanks
LGR
 

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A short ground with ring terminals at both ends is attached to the bottom of one of the handlebar mounts and to one of the bolts that mount the gauges to their bracket, which is mounted directly to the top bridge, creating the ground for the handlebars through the steering head bearings to the frame. It's not shown for the 175 for some reason, but it's common to the 350 and 450

https://images.cmsnl.com/img/partslists/honda-cb175k5-super-sport-1971-usa-steering-handle-top-bridge_bigma000158f02_3a3b.gif

https://images.cmsnl.com/img/partslists/honda-cb175k5-super-sport-1971-usa-speedometer-tachometer_bigma000158f19_f0ea.gif

it's #1 in the 450 fiche

https://images.cmsnl.com/img/partslists/honda-cb450k4-usa-f-20-speed-and-tacho-meters-cb450-k3-k4_big3IMG01171618_ef9b.gif
 

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Discussion Starter · #8 ·
got the ground installed and and power to both switches. Howwwwever my horn sound like a mason jar opening if that makes sense. any ideas?

Later
LGR
 

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Horns sometimes have a tuning screw , located front center of the horn, which can "adjust" the sound. They also sometimes just crap out.
 

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A short ground with ring terminals at both ends is attached to the bottom of one of the handlebar mounts and to one of the bolts that mount the gauges to their bracket, which is mounted directly to the top bridge, creating the ground for the handlebars through the steering head bearings to the frame. It's not shown for the 175 for some reason, but it's common to the 350 and 450

https://images.cmsnl.com/img/partslists/honda-cb175k5-super-sport-1971-usa-steering-handle-top-bridge_bigma000158f02_3a3b.gif

https://images.cmsnl.com/img/partslists/honda-cb175k5-super-sport-1971-usa-speedometer-tachometer_bigma000158f19_f0ea.gif

it's #1 in the 450 fiche

https://images.cmsnl.com/img/partslists/honda-cb450k4-usa-f-20-speed-and-tacho-meters-cb450-k3-k4_big3IMG01171618_ef9b.gif
It's not shown, because they're not stock. Honda for some reason thought letting the bars earth through the clutch cable would suffice
The cb200's seem to have gotten the bridging wire.
 
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