GL1500 Headlights operated by Oil Pressure Light


Information and questions on GL1500 Goldwings (1988-2000)
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Erdeniz Umman
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Motorcycle: 2000 GL1500SE

GL1500 Headlights operated by Oil Pressure Light

Post by Erdeniz Umman » Sat Aug 05, 2017 7:50 am



Although I had shared this solution before in this forum, I wanted to start a new thread on this subject to make it more visible and findable for those interested in.

The modification will be based on the oil pressure light signal, and it will have a safety feature to keep the headlights ON in case of an engine failure in the middle of the dark.

With this modification, you will not need an extra switch to control the headlights, they will come on as soon as the engine starts running. So you will not waste the important voltage in your battery before starting.

Once the headlights come on, they can only be turned off by turning the ignition key to OFF position.

And also, you will not violate the laws in your country which require the headlights to be ON when riding.

For this modification you will need;
1 Normally Open 20A relay
1 Normally Closed 20A relay
and 2 diodes (IN4001 or IN4007).

The circuit diagram and the connectors (C22 and C57) you will need to reach over the right fan are given below.
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ct1500
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Re: GL1500 Headlights operated by Oil Pressure Light

Post by ct1500 » Sat Aug 05, 2017 12:45 pm

Good, thank you. How are the EuroSpec bikes wired with a headlight ON-OFF switch on the left handlebar? A picture perhaps or part number for that switch housing with the related wiring diagram.
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Erdeniz Umman
Posts: 367
Joined: Tue Oct 27, 2015 12:33 am
Location: Ankara Turkey
Motorcycle: 2000 GL1500SE

Re: GL1500 Headlights operated by Oil Pressure Light

Post by Erdeniz Umman » Sat Aug 05, 2017 1:49 pm

ct1500 wrote:
Sat Aug 05, 2017 12:45 pm
Good, thank you. How are the EuroSpec bikes wired with a headlight ON-OFF switch on the left handlebar? A picture perhaps or part number for that switch housing with the related wiring diagram.
Ok, here are what I have in my library.
Also, the headlight contacts in the start/reverse button are canceled and don't have any function to turn off the headlights when pushing the start button.
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WingAdmin
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Re: GL1500 Headlights operated by Oil Pressure Light

Post by WingAdmin » Wed Aug 30, 2017 8:09 pm

I built pretty much this exact circuit for my GL1500 when I had HID headlights, except I used SPDT relays (and just used one of the two poles in each). The reason was that HID headlights wear out by how many times they turn on and off. So instead of flicking them off and on when the starter was pressed, they would come on only when the engine was running, and would latch on (thanks to the circuit), so that if I stalled the engine, I wouldn't lose my headlights.

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Greenwinger
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Re: GL1500 Headlights operated by Oil Pressure Light

Post by Greenwinger » Thu Sep 21, 2017 4:24 am

I have my headlight hooked up to my side stand switch. So the light stays off until the side stand is in the up position. I also have a bypass switch on the bike so I can check the headlight when I want to.



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