Tachometer gauge not working


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YourJere
Posts: 10
Joined: Sun Sep 08, 2019 8:29 pm
Location: Waller, Texas
Motorcycle: 1977 GL1000

Tachometer gauge not working

Post by YourJere » Thu Sep 12, 2019 5:03 am



My tach cable seems to spin but nothing happens within the gauge
But also I am pretty sure my temp gauge works.
Will I be able to replace the singular gauge or fix it?



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virgilmobile
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Re: Tachometer gauge not working

Post by virgilmobile » Thu Sep 12, 2019 7:25 am

Look close.Does the cable end extend into the tach.
My spedo cable also turned but the spedometer didn't move.I found the cable appeared too short.It wasn't.The outer casing had pulled away from the end coupler about a half inch.
I warmed it up with a heat gun and reseated the outer cable into the coupler and this extended the inner cable far enough to make the connection to the spedo drive.
I have also used a drill with a homemade extension inserter into the tach/spedo to spin it to check if they work and are smooth operating.

YourJere
Posts: 10
Joined: Sun Sep 08, 2019 8:29 pm
Location: Waller, Texas
Motorcycle: 1977 GL1000

Re: Tachometer gauge not working

Post by YourJere » Thu Sep 12, 2019 7:30 am

virgilmobile wrote:
Thu Sep 12, 2019 7:25 am
Look close.Does the cable end extend into the tach.
My spedo cable also turned but the spedometer didn't move.I found the cable appeared too short.It wasn't.The outer casing had pulled away from the end coupler about a half inch.
I warmed it up with a heat gun and reseated the outer cable into the coupler and this extended the inner cable far enough to make the connection to the spedo drive.
I have also used a drill with a homemade extension inserter into the tach/spedo to spin it to check if they work and are smooth operating.
Thanks, I'll try that out soon in the future

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virgilmobile
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83 GL1100 I
83 GL1100 standard
84 GL 1200 I

Re: Tachometer gauge not working

Post by virgilmobile » Thu Sep 12, 2019 8:22 am

Keep in mind that the temp/fuel gauge operate from a 7 volt regulator.Should it go bad,both gauges are affected.This site has a new replacement for it.

YourJere
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Re: Tachometer gauge not working

Post by YourJere » Thu Sep 12, 2019 7:02 pm

Believe my temp gauge works, at what point of the temp gauge should the radiator fan activate?

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virgilmobile
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83 GL1100 I
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84 GL 1200 I

Re: Tachometer gauge not working

Post by virgilmobile » Thu Sep 12, 2019 7:26 pm

Somewhere around 200°.

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SnoBrdr
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Re: Tachometer gauge not working

Post by SnoBrdr » Thu Sep 12, 2019 8:09 pm

YourJere wrote:
Thu Sep 12, 2019 7:02 pm
Believe my temp gauge works, at what point of the temp gauge should the radiator fan activate?
GL gauges are to be used for guesstimates only.

The worst of the 3 is the gas gauge.

YourJere
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Re: Tachometer gauge not working

Post by YourJere » Sat Sep 14, 2019 2:07 am

virgilmobile wrote:
Thu Sep 12, 2019 8:22 am
Keep in mind that the temp/fuel gauge operate from a 7 volt regulator.Should it go bad,both gauges are affected.This site has a new replacement for it.
I might be needing to buy that regulator.I remember when I got my bike a few months ago the fuel gauge sort of worked but it moved so slow and would sometimes stop a quarter of the way, and they both work occasionally off and on. Do I need a full battery for both to work? The regulator is a bit expensive for me so I wanted to mess with it a bit more

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DenverWinger
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Re: Tachometer gauge not working

Post by DenverWinger » Sat Sep 14, 2019 5:47 am

If the regulator is bad the symptoms are the electric gauges will go to either full-scale or zero, and stay there. So most likely your regulator is OK.

You might try taking the fuel sender out of the tank and soaking it overnight in vinegar to dissolve the rust and corrosion, that would likely fix the fuel gauge.
♫ 99 Little Bugs in the Code, ♪
♪ 99 Bugs in the Code. ♫ :(
♫ Take one down, Patch it around, ♪
♫ 127 Little Bugs in the Code. ♫ ♪ :shock:

~Mark

YourJere
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Joined: Sun Sep 08, 2019 8:29 pm
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Re: Tachometer gauge not working

Post by YourJere » Sun Sep 15, 2019 6:01 pm

DenverWinger wrote:
Sat Sep 14, 2019 5:47 am
You might try taking the fuel sender out of the tank and soaking it overnight in vinegar to dissolve the rust and corrosion, that would likely fix the fuel gauge.
I've done that before and cleaned out the inside, I honestly thought the issue seemed to be within the gauge almost with how slow the needle moved.
Also last few times I used the motorcycle the temp gauge worked pretty good but at no point did it ever activate the radiator fan so I am not sure if engine just didn't get hot enough

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DenverWinger
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1980 GL1100 STD Vetter (2005-)
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1972 CL350 (1980-1988) sold
1978 Suzuki GS550 (1985-2005) sold
1977 GL1000 (2002-2006) sold

Re: Tachometer gauge not working

Post by DenverWinger » Sun Sep 15, 2019 9:31 pm

Fan won't come on until temp gauge reaches half-scale or so when things are working correctly, at least that's how my 1100 behaves and my 1000 did same.

The temperature switch for kicking on the fan is separate from the temperature sender, so the fan should work correctly independent of the temp gauge. as you said, you probably just haven't got it hot enough yet. If you see temperature gauge hit 3/4 scale and no fan I'd start checking out the fan system. The control switches and fan motors rarely fail, most common fan failure on the 4 cyl 'wings is corrosion on the fan switch terminals.

There's heavy damping on the fuel gauge needle, this to keep the needle from bouncing around with the sloshing fuel, it doesn't need to move fast. So most likely is OK.


♫ 99 Little Bugs in the Code, ♪
♪ 99 Bugs in the Code. ♫ :(
♫ Take one down, Patch it around, ♪
♫ 127 Little Bugs in the Code. ♫ ♪ :shock:

~Mark

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