'75 GL1000 TEMPERATURE GAUGE


Information and questions on GL1000 Goldwings (1975-1979)
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TOMMYBOY24RIDER
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'75 GL1000 TEMPERATURE GAUGE

Post by TOMMYBOY24RIDER » Sun Feb 24, 2019 1:56 pm



THE WATER TEMPERATURE GAUGE ON MY 1975 GL1000 GOES TO FULL HOT WHEN KEY IS TURNED ON ???



fatalbert
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Re: '75 GL1000 TEMPERATURE GAUGE

Post by fatalbert » Sun Feb 24, 2019 2:30 pm

Without going into detail, it would appear you have a short to ground on the wire to the temperature sensor. As the actual engine temp goes up, the resistance through the temperature sensor to ground will go down.
Pull the wire off the sensor and measure the sensor resistance to ground. At 140 degrees the resistance would be greater than 100 ohms, so at room temp it should be higher than this.

If good, start chasing the wire that goes back to the temp guage for a short to ground. Good luck.

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DenverWinger
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Re: '75 GL1000 TEMPERATURE GAUGE

Post by DenverWinger » Sun Feb 24, 2019 3:40 pm

Could be the 7 volt regulator if the fuel gauge is reading wrong, too.
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dingdong
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Re: '75 GL1000 TEMPERATURE GAUGE

Post by dingdong » Sun Feb 24, 2019 5:39 pm

DenverWinger wrote:
Sun Feb 24, 2019 3:40 pm
Could be the 7 volt regulator if the fuel gauge is reading wrong, too.
Ditto!
Tom

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Maz
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Re: '75 GL1000 TEMPERATURE GAUGE

Post by Maz » Mon Feb 25, 2019 6:14 am

fatalbert wrote:
Sun Feb 24, 2019 2:30 pm
Without going into detail, it would appear you have a short to ground on the wire to the temperature sensor. As the actual engine temp goes up, the resistance through the temperature sensor to ground will go down.
Pull the wire off the sensor and measure the sensor resistance to ground. At 140 degrees the resistance would be greater than 100 ohms, so at room temp it should be higher than this.

If good, start chasing the wire that goes back to the temp guage for a short to ground. Good luck.
Good luck getting to the sensor without removing the carbs!

Maz
Ironically, Common Sense is the LEAST common of all senses!

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ekvh
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Re: '75 GL1000 TEMPERATURE GAUGE

Post by ekvh » Mon Feb 25, 2019 11:54 am

If it’s the seven volt regulator, it controls the fuel gauge as well, so your fuel gauge will gradually show full even when not. If your fuel gauge isn’t working, it’s probably because it’s been getting full 12volts and burned out. The temp gauge will also if not repaired.

A multimeter on the three wires to and from the seven volt regulator will tell you fastest.



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