8 Volts?


Information and questions on GL1500 Goldwings (1988-2000)
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alessandro
Posts: 8
Joined: Sun Apr 18, 2021 11:38 am
Location: Varese Italy
Motorcycle: 1999 GL 1500 SE

8 Volts?

Post by alessandro »



Hello, my 1500 has melted the light switch. The front lights P reaches 7/8 volts. At the front light 13 volts. If I join the wires of the light switch the wires get hot. Also on the license plate light there are 8 volts. Sorry for the Google translation


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Swagonmaster
Posts: 330
Joined: Sun Apr 16, 2017 3:30 pm
Location: Stokesdale, NC
Motorcycle: 1990 gl1500 SE

Re: 8 Volts?

Post by Swagonmaster »

You seem to have a partial short circuit or a connection to something that shouldn't be on that circuit. Try taking all of the bulbs that are only getting 8 volts out and see if the voltage goes up. While this likely won't work it's worth a try to make sure it's not just a bulb in wrong. I am assuming that there hasn't been any work done on the bike that could have caused a problem and if so then you will just have to try to isolate a reason for the excessive draw. Try disconnecting the two large harness plugs that are under the seat to disconnect the rear lights and be looking for any sign of overheated wires at the connectors or anywhere.
Try to learn from the mistakes of others..... you won't live long enough to make them all yourself!
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alessandro
Posts: 8
Joined: Sun Apr 18, 2021 11:38 am
Location: Varese Italy
Motorcycle: 1999 GL 1500 SE

Re: 8 Volts?

Post by alessandro »

thanks, tomorrow morning I'll try
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alessandro
Posts: 8
Joined: Sun Apr 18, 2021 11:38 am
Location: Varese Italy
Motorcycle: 1999 GL 1500 SE

Re: 8 Volts?

Post by alessandro »

I disconnected all 3 plugs, but nothing. I disconnected the 2 plugs on each side, 2 left 2 right next to the radio but nothing. Disconnected the fog lights but nothing. Both in front and behind the P bulbs arrive 8/9 volts, and the switch voltage leads are hot.
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Swagonmaster
Posts: 330
Joined: Sun Apr 16, 2017 3:30 pm
Location: Stokesdale, NC
Motorcycle: 1990 gl1500 SE

Re: 8 Volts?

Post by Swagonmaster »

Well this is where things get more difficult, you are going to need to separate the lights from everything else. Remove all of the fuses other than the one for the lights and using a test light probe to see which side of the fuse holder is the hot side and then check the other (recieving) side which should be dead without the fuse in to power it and see if there is a circuit that is hot when it shouldn't be. All we know right now is that something is drawing a lot of power and it is happening after the light switch which is why the switch is getting hot. Since disconnecting the rear lights didn't change things the issue is likely in the front half of the wiring. Be watchful of any sign of damaged wires that could be shorting together. I hope that it goes well for you, this type of thing can be hard to find and fix.
Try to learn from the mistakes of others..... you won't live long enough to make them all yourself!
User avatar
alessandro
Posts: 8
Joined: Sun Apr 18, 2021 11:38 am
Location: Varese Italy
Motorcycle: 1999 GL 1500 SE

Re: 8 Volts?

Post by alessandro »

thanks, hope to solve


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