Honda CX 500 Forum banner

1 - 20 of 34 Posts

·
Registered
Joined
·
20 Posts
Discussion Starter #1
Hi All,
I am new to this forum and A new 1981 GL500 owner. I have a big problem I was hoping to get some input about. Everything electrical on the bike works except for headlamp. I do not have power at the pigtail. Fuses are all good, have power into hi lo switch, all other lights work, brake, blinkers, tail, running lights in front blinkers. I do not have Hi beam indicator light.
any help would be appreciated.
Frank
 

·
Registered
Joined
·
3,555 Posts
The start switch shuts off the headlamp when it is pushed to start the engine. Check out the start button. You can try spraying some contact cleaner in there and operate the switch a few times. If that doesn't work trace for power from the Hi/Lo switch to the start button then to the headlamp.
Check for a good ground at the headlamp by running a jumper wire from battery negative to the headlamp.
 

·
Super Moderator
Joined
·
20,306 Posts
The hi'lo switch contacts can also wear.

This can be checked by opening the left control and locating the three solder blobs on the beam switch.

Bridge the blue/white to each of the blue and white wires in turn. If the light comes on you'll likely need to shim the moving contact.

info on switches here.


Not a comprehensive write up - more the salvaging of my photobucket pictures.

This wire also passes through a fuse at the handlebars on the way from right control to left. Comes out of the fuse going left as the blue/white wire.
 

·
Registered
Joined
·
20 Posts
Discussion Starter #5
Ok so I have power into hi lo switch by putting meter On blobs of solder. Does this mean starter switch is good? Just trying to narrow problem down. Also with key on, jumping negative battery terminal to green wire in headlamp pigtail did not light up bulb. Also jumping + side of batttery to white and blue terminals on pigtail did not light bulb. Sound like hi lo switch or broken wire between switch and headlight pigtail?? I will check the output side of hi lo switch later today.
 

·
Registered
Joined
·
86 Posts
I have to jiggle my start button to get the headlight to work. I too suggest spraying some contact cleaner in there. Occam's Razor and all that.
 

·
Registered
Joined
·
20 Posts
Discussion Starter #8
New update when bridging the connections I get high and low beams. So is this the culprit? image.jpg
 

·
Super Moderator
Joined
·
20,306 Posts
Yes. The spring behind it has become weak and likely the contact faces have a little wear.

If you cut a small piece of aluminium drink can and slide it behind the moving contact and put a bit of an angle on about 2 mm sticking out each side so that the aluminium can't fall out the switch should work again
 

·
Registered
Joined
·
20 Posts
Discussion Starter #10
Yes. The spring behind it has become weak and likely the contact faces have a little wear.

If you cut a small piece of aluminium drink can and slide it behind the moving contact and put a bit of an angle on about 2 mm sticking out each side so that the aluminium can't fall out the switch should work again
image.jpg
 

·
Registered
Joined
·
1,252 Posts
I have to jiggle my start button to get the headlight to work. I too suggest spraying some contact cleaner in there. Occam's Razor and all that.
My kill switch wasn't working right and I sprayed it with cleaner and that fixed it.
 

·
Registered
Joined
·
20 Posts
Discussion Starter #17
Ok folks bad news went to put rocker back in after shimming and now I have no power to switch? Not a thing to blue white. Nothing if I bridge the solder joints. HAVE I TOLD ANYONE I HATE ELECTRICAL ISSUES???? How do you have power one minute and down to putting a little shim in and now Nada?
 

·
Registered
Joined
·
20 Posts
Discussion Starter #19
I took it back apart, shim is good but noe no power to Hilo switch mmmmmmmm
 
1 - 20 of 34 Posts
Top