Headlight stopped working

vossler · Post by **vossler** » Wed Jun 27, 2018 7:50 am

New to the forum here, and to CA77's in general, but have tinkered with lots of bikes. Bought a 67 CA77 out of a barn it had been sitting in since 1983, got it running, everything appeared to work great.

Second time firing the bike, low beam stopped working, flipped up to high beam and it worked for a short while, then it too, stopped working. The bulb appears to be good. Measured voltage at the headlight, no 12v.

Are there fuses I am not seeing? Could it be in the switch? Any advice would be greatly appreciated!

Seadog · Post by **Seadog** » Wed Jun 27, 2018 9:40 am

I’d check the connections to the bulb and clean them, then, using an ohm meter, the ground connection at the trim ring, the headlight bucket to frame, then the headlight switch on the headlight housing, then the high/low beam switch on the handlebar. There is no fuse for the headlight.

vossler · Post by **vossler** » Wed Jun 27, 2018 10:55 am

Where is the headlight switch on the headlight housing located? I don't recall seeing a switch there.

Seadog · Post by **Seadog** » Wed Jun 27, 2018 11:21 am

There isn’t, I was thinking CB77. The rest of my post is fine. Check the ignition switch connections for corrosion too.

vossler wrote:Where is the headlight switch on the headlight housing located? I don't recall seeing a switch there.

G-Man · Post by **G-Man** » Wed Jun 27, 2018 11:58 am

Disconnect the wires to the bulb and put a meter across on the Ohms range. Do you get a reading?

Was the engine running or not when the bulb(s) stopped working?

G

Seadog wrote:There isn’t, I was thinking CB77. The rest of my post is fine. Check the ignition switch connections for corrosion too.

vossler wrote:Where is the headlight switch on the headlight housing located? I don't recall seeing a switch there.

vossler · Post by **vossler** » Wed Jun 27, 2018 12:46 pm

Engine was running when it stopped working. I've got continuity across the bulb, I checked that first.