Water temp sending unit 75 GL1000


Information and questions on GL1000 Goldwings (1975-1979)
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Docketdog
Posts: 8
Joined: Sun Nov 06, 2016 4:08 pm
Location: Tampa, FL
Motorcycle: 1975 GL1000 Goldwing

Water temp sending unit 75 GL1000

Post by Docketdog »



Just noticed my temp gauge on my 75 GL1000 25,000 miles has started reading 110C ...next to HOT......normally runs middle of the white arc.

installed new "Honda"thermostat and new Ebay radiator ...still same 110 reading. Wondering if changing out the water temp sending unit might correct this issue...also the fan runs all the time because of the higher temp reading.

Thanks for your help,

Bill


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WingAdmin
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Location: Strongsville, OH
Motorcycle: 2000 GL1500 SE
1982 GL1100A Aspencade (sold)
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Re: Water temp sending unit 75 GL1000

Post by WingAdmin »

Docketdog wrote:Just noticed my temp gauge on my 75 GL1000 25,000 miles has started reading 110C ...next to HOT......normally runs middle of the white arc.

installed new "Honda"thermostat and new Ebay radiator ...still same 110 reading. Wondering if changing out the water temp sending unit might correct this issue...also the fan runs all the time because of the higher temp reading.

Thanks for your help,

Bill
First off: Is your fuel gauge also reading higher than it should? If so, see this: /Store/Goldwing- ... ulator.asp

If the fuel gauge is reading normally, check the wire between the gauge and the sensor. If it is pinched and partially shorted against ground, it will cause the gauge to read higher.

Have you actually tested the resistance of the temperature sensor to see if it is reporting the correct resistance? A little diagnosis goes a long way towards preventing the repair-by-blind-replacement-of-parts method used by most car dealerships today.
Docketdog
Posts: 8
Joined: Sun Nov 06, 2016 4:08 pm
Location: Tampa, FL
Motorcycle: 1975 GL1000 Goldwing

Re: Water temp sending unit 75 GL1000

Post by Docketdog »

Thanks for the quick reply

The fuel gauge seems to be working correctly.

I did purchase your excellent 7 volt regulator last year ..... checking, I see 6.7 volts.

No, I did not check the water temp sending unit....will be on the tomorrow do list.

Again, thanks for the suggestions.

Bill
2000 wing
Posts: 69
Joined: Thu Dec 01, 2016 1:12 pm
Location: Canton, tx,Van Zandt
Motorcycle: 1973 honda 500 1978 goldwing, 1000. 1979 gl 1000, 1982 gl 1100,1984 gl 1200 1989 gl 1500. 2000 gl 1500 se

Re: Water temp sending unit 75 GL1000

Post by 2000 wing »

If your gauge is showing hot and your fans are coming on the engine is probably hot. Could be thermostat, or weak hoses closing up.
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RBGERSON
Posts: 3233
Joined: Tue Mar 09, 2010 7:57 am
Location: SCOTTSDALE, AZ
Motorcycle: 98 SE GL 1500
had every year from 75 to 83

Re: Water temp sending unit 75 GL1000

Post by RBGERSON »

check the easy stuff first and move to more involved stuff:

Water level in radiator and/or over flow
fuel gauge works as it should? if not voltage issue/regulator?
water pump weep hole dry? if not bad pump
fan comes on?? at about halfway on the gauge? if not bad fan, or wires/connections or sensor
good flow internally???..hard to check but easy to fill with vinegar let sit for a day or two drain and refill..will remove most of the crap from the system.
thermostat opening?? pull it and check in a pot of water on the stove should open just before the water boils..or around 180-190* if memory serves..????


HAD LOTS OF GOLDWING 75-83
NOW INTO 1500'S..RIDING A 1998 SE

FAIR WINDS,
RB
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