GL1000 dim headlight


Information and questions on GL1000 Goldwings (1975-1979)
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rustyparts
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Location: Denison TX
Motorcycle: 1976 GL1000 x 2
2008 GL1800
2010 GL1800 Trike

Re: 1976 Goldwing dim headlight

Postby rustyparts » Fri Sep 18, 2015 1:25 pm



I was wondering if any of you guys that weighed in on the dim headlight issue on the '76 Gold wing would give me a hand with my problem. I have recently purchased a very clean '76 wing with 6300 actual miles on it. It had a faring on but was removed prior to my purchase. The high and low beam are very dim and after looking for a fix here I decided to wire the headlight directly from the battery using 2 40 amp relays per the article. After following the diagram my high and low beam stayed on all the time the ignition switch was on. I checked the voltage at the headlight plug and found the voltage to be 7 to 9 volts at either the high or low beam depending on the dimmer switch position so with voltage to the high and low beam both relays are actuated. At this point I poped the headlight off my other '76 Goldwing and checked the voltage at the headlight plug. I measured 11.5 volts on whichever beam was on and nothing on the other. At this point I thought I'd found the problem, the dimmer switch had to be faulty shorting across both posts. I took the dimmer switch apart and checked the switch for continuity and the switch works fine. With current on to the switch all 3 wires, blue/white, blue and white all show voltage. Current has to be coming from another source but at this point I've about run out of ideas. Also, when I go back to the original wiring the high and low beam on the headlight work as intended only very dim. That may be because of the 2 volt drop thru the dimmer switch, I don't know. None of the wiring shows to have spliced or abused in any way. Sorry for turning this into a novel but I'm trying to give the information I have. Any help would be appreciated.



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rustyparts
Posts: 21
Joined: Thu Mar 20, 2014 7:35 pm
Location: Denison TX
Motorcycle: 1976 GL1000 x 2
2008 GL1800
2010 GL1800 Trike

GL1000 dim headlight

Postby rustyparts » Fri Sep 18, 2015 11:42 pm

I am having a problem with my 1976 GL1000 and I put it in the wrong forum (GL1000 DIY) and I don't know how to move it to here but its pretty lengthy and I'd appreciate your taking a look and any help you can offer.

SnoBrdr
Posts: 329
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Location: Providence, Rhode Island
Motorcycle: 1978 GL 1000

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Re: GL1000 dim headlight

Postby SnoBrdr » Sun Sep 20, 2015 1:32 pm

rustyparts wrote:I am having a problem with my 1976 GL1000 and I put it in the wrong forum (GL1000 DIY) and I don't know how to move it to here but its pretty lengthy and I'd appreciate your taking a look and any help you can offer.


You know how to copy/ Control -C, after highlighting the test.

Then Control-V to paste it in a msg here.

SnoBrdr
Posts: 329
Joined: Fri Mar 07, 2014 9:01 am
Location: Providence, Rhode Island
Motorcycle: 1978 GL 1000

129K Original Owner

Re: GL1000 dim headlight

Postby SnoBrdr » Sun Sep 20, 2015 1:34 pm

rustyparts wrote:I am having a problem with my 1976 GL1000 and I put it in the wrong forum (GL1000 DIY) and I don't know how to move it to here but its pretty lengthy and I'd appreciate your taking a look and any help you can offer.


I also did not see it in GL1000 DIY.

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rustyparts
Posts: 21
Joined: Thu Mar 20, 2014 7:35 pm
Location: Denison TX
Motorcycle: 1976 GL1000 x 2
2008 GL1800
2010 GL1800 Trike

Re: GL1000 dim headlight

Postby rustyparts » Mon Sep 21, 2015 11:26 am

I think the post was removed from the DIY forum so I'll rewrite it here in hopes that someone can perform an exorcism.
I was wondering if any of you guys that weighed in on the dim headlight issue on the '76 Goldwing would give me a hand with my problem. I have recently purchased a very clean '76 wing with 6300 actual miles on it. It had a faring on but was removed prior to my purchase. The high and low beam are very dim and after looking for a fix here I decided to wire the headlight directly from the battery using 2 40 amp relays per the article. Before going forward with this plan I checked for a ground issue by running a wire directly from the green ground wire at the headlight plug to the negative post on the battery with no improvement. After following the diagram my high and low beam stayed on all the time the ignition switch was on. I checked the voltage at the headlight plug and found the voltage to be 7 to 9 volts at either the high or low beam depending on the dimmer switch position so with voltage to the high and low beam both relays are activated. At this point I poped the headlight off my other '76 Goldwing and checked the voltage at the headlight plug. I measured 11.5 volts on whichever beam was on and nothing on the other. At this point I thought I'd found the problem, the dimmer switch had to be faulty shorting across both posts. I took the dimmer switch apart and checked the continuity and the switch is working fine. With current on to the switch all 3 wires, blue/white, blue and white all show voltage. Current has to be coming from another source but at this point I've about run out of ideas. Also, when I go back to the original wiring the high and low beam work as intended only very dim. That may be because of the 2 volt drop thru the dimmer switch, I don't know. None of the wiring shows to have been spliced or abused in any way. Sorry for turning this into a novel but I'm trying to give the information I have. Any halp would be appreciated.

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WingAdmin
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Re: 1976 Goldwing dim headlight

Postby WingAdmin » Mon Sep 21, 2015 12:37 pm

You could have a bad connector somewhere in between, bad fuse, corrosion on a fuse connector...basically you need to measure the voltage along the path from battery to headlight bulb and find the part where the voltage is dropping. It should also be apparent because to drop the voltage that much you're going to be generating some heat as well.

If all else fails, you can fun a fresh (fused!) wire from the battery to the headlight, and use a SPDT automotive (30 amp minimum) relay to switch it between the high and low beam elements. Then use the original headlight wiring to energize the coil on the relay.

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rustyparts
Posts: 21
Joined: Thu Mar 20, 2014 7:35 pm
Location: Denison TX
Motorcycle: 1976 GL1000 x 2
2008 GL1800
2010 GL1800 Trike

Re: GL1000 dim headlight

Postby rustyparts » Tue Sep 22, 2015 4:16 pm

Here's an update to my headlight problem. I started substituting components from my other '76 and discovered the culprit to be the lighting unit. After switching them out the beam is stronger and the problem of currant to both high and low beam at the same time went away. There appears to be a loose screw sealed under the coating of insulation. I'll try to load a couple of pictures. Sense there are just 6300 miles on it I wonder if Honda will warranty it. I guess the pictures didn't work out. Oh well, thanks to everyone who offered a suggestion. Rusty

User avatar
rustyparts
Posts: 21
Joined: Thu Mar 20, 2014 7:35 pm
Location: Denison TX
Motorcycle: 1976 GL1000 x 2
2008 GL1800
2010 GL1800 Trike

Re: GL1000 dim headlight

Postby rustyparts » Tue Sep 22, 2015 11:44 pm

Here's an update to my headlight problem. I started substituting components from my other '76 and discovered the culprit to be the lighting unit. After switching them out the beam is stronger and the problem of currant to both high and low beam at the same time went away. There appears to be a loose screw sealed under the coating of insulation. I'll try to load a couple of pictures. Sense there are just 6300 miles on it I wonder if Honda will warranty it.

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Fred Camper
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Motorcycle: 1977 GL1000, 1976 LTD GL1000

Re: GL1000 dim headlight

Postby Fred Camper » Sun Feb 28, 2016 5:08 pm

It most certainly is still under the manufacturer warranty for miles lol. Gladly got it figured out. The relay are a nice upgrade now that the basic wiring issue is solved.




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