1985 LTD Repair of Fuel Low Level Light and Travel Computer Issues


Information and questions on GL1200 Goldwings (1984-1987)
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Rednaxs60
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Motorcycle: 1985 GL1200 LTD
1995 GL1500 SE CDN Edition
2012 Suzuki DL1000 VStrom
2008 GL1800 (sold)
Ontario 1985 GL1200 LTD (sold)

1985 LTD Repair of Fuel Low Level Light and Travel Computer Issues

Post by Rednaxs60 »



Since I had my side stand interlock/indicator light circuit completed, I decided I would tackle the thermistor issue with the low fuel level light not working and the travel computer QTY and RANGE not functioning. I have to say that the thread by sprotsfreaked was the impetus for this fix.

I checked my travel computer readings for QTY and RANGE and found these were flashing dashes as mentioned by sportsfreaked. I knew the low fuel level light did not come on because last year I almost ran completely out of gas even with one bar showing on the dash fuel level.

This afternoon I took the fuel sending unit out of the bike. It is located under the seat:


Next item removed was the seat cross brace to give more room. The brace is connected with two 12mm bolts and where the front of the seat is secured there are 2-10mm bolts:


Next was to remove the seat cross brace and sending unit securing ring:


Removal of the cross brace gives more room to work.

Once this was done the sending unit came out very easy. Here it is on the work bench:


There is a securing tab that is attached to the bracket holding the thermistor housing in place and keeps the thermistor plastic piece in the thermistor housing. I had to pry this away from the thermistor housing to remove the black retaining piece that secures the thermistor inside the housing:


The thermistor is secured to the bottom of the housing:


This small bit of solder has to be removed to make way for the new thermistor install.

Once the securing tab was out of the way, the black plastic piece in the housing can be removed that holds the thermistor in place. The thermistor is also connected to the bottom of the housing and this has to be removed.


This picture also shows the thermistor out of the housing.

When working on removing the old thermistor, the housing is soldered to the thermistor housing retaining piece.

I used a soldering gun and removed the old thermistor and installed the new thermistor in its place.


I installed the new thermistor length the same as the one taken out. The long end of the thermistor that will fit through the end of the thermistor housing will be cut off after it is secured in place.

Once the thermistor is connected to the sending unit wire, the install is the opposite of the removal. You have to fit the thermistor into the housing and secure the unattached piece of the thermistor to the bottom of the housing with a dab of solder. Push the black "grommet" into the housing and squeeze the securing ring back into place so that it looks like the unit when it was removed from the bike.

Part 2 to follow.


Last edited by Rednaxs60 on Tue Mar 28, 2017 7:14 pm, edited 1 time in total.
"When you write the story of your life, don't let anyone else hold the pen"

Ernest

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Rednaxs60
Posts: 2352
Joined: Wed Nov 18, 2015 12:44 pm
Location: Victoria, British Columbia, Canada
Motorcycle: 1985 GL1200 LTD
1995 GL1500 SE CDN Edition
2012 Suzuki DL1000 VStrom
2008 GL1800 (sold)
Ontario 1985 GL1200 LTD (sold)

Re: 1985 LTD Repair of Fuel Low Level Light and Travel Computer Issues

Post by Rednaxs60 »

Once the thermistor is back in the sending unit, the sending unit install is the reverse of how you take it out. The sending unit is oriented towards the front of the bike. The tab on the sending unit is oriented such that it is towards the front of the bike.


The sending unit securing ring also has an arrow that indicates how it is to be installed. The arrow is oriented towards the front of the bike.

Once I had the unit installed, the amount of fuel is not at a level to illuminate the low fuel warning light; however, I did test the travel computer QTY and RANGE functions. The dash went thru the checks as per normal. I checked the travel computer QTY and RANGE indicators. I now had numbers instead of flashing dashes. This is the QTY reading:


This is the RANGE function working properly:


If sportsfreaked is correct, I should now get a low level indication. I will report on this when i next go for a ride and let the fuel level drop.

Another good afternoon.
"When you write the story of your life, don't let anyone else hold the pen"

Ernest

sportsfreaked
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Motorcycle: 1981 Honda Goldwing Interstate GL1100I
1985 Honda Goldwing Limited Edition gl1200

Re: 1985 LTD Repair of Fuel Low Level Light and Travel Computer Issues

Post by sportsfreaked »

Ernest good job. I'm glad it worked out for you. Now your fuel light will come on when you have about a gallon or so left in the tank.
Thanks to all who answer and help. It is greatly appreciated!
Ed

sportsfreaked
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Motorcycle: 1981 Honda Goldwing Interstate GL1100I
1985 Honda Goldwing Limited Edition gl1200

Re: 1985 LTD Repair of Fuel Low Level Light and Travel Computer Issues

Post by sportsfreaked »

Ernest curious to know if your fuel light came on? Thanks Ed.
Thanks to all who answer and help. It is greatly appreciated!
Ed

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Rednaxs60
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Joined: Wed Nov 18, 2015 12:44 pm
Location: Victoria, British Columbia, Canada
Motorcycle: 1985 GL1200 LTD
1995 GL1500 SE CDN Edition
2012 Suzuki DL1000 VStrom
2008 GL1800 (sold)
Ontario 1985 GL1200 LTD (sold)

Re: 1985 LTD Repair of Fuel Low Level Light and Travel Computer Issues

Post by Rednaxs60 »

Ed - Chickened out with the first fill up. QTY read 4.5, probably closer to 4 litres remaining. Filled up and put in 18.4 litres. I now have a bench mark and willing to take it down to 2 or 2.5 litres. Hoping this does the trick. Other than chickening out on the light, everything else is working. Down to 6 litres at the moment.

Going to get at the fuel injectors. Have second '85 LTD at my brothers. He is shipping the injectors from the one at his place. I'll clean them then install. Clean the ones I take out and put back in the other '85. Win-win all round.

Cheers
"When you write the story of your life, don't let anyone else hold the pen"

Ernest

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Rednaxs60
Posts: 2352
Joined: Wed Nov 18, 2015 12:44 pm
Location: Victoria, British Columbia, Canada
Motorcycle: 1985 GL1200 LTD
1995 GL1500 SE CDN Edition
2012 Suzuki DL1000 VStrom
2008 GL1800 (sold)
Ontario 1985 GL1200 LTD (sold)

Re: 1985 LTD Repair of Fuel Low Level Light and Travel Computer Issues

Post by Rednaxs60 »

Finishing up this project.

Went out today and let the fuel drop in the tank. The low fuel level light came on when the QTY indicator said I had approximately 4.0 litres left in the tank. Rode about 2 more Kms and filled up. Put 19.5 litres in the tank. Fuel tank capacity is 22 litres, so I have 2.5 litres remaining when the light comes on. Now I know what to expect.

All indicators for the fuel system are now working.

Good little project.
"When you write the story of your life, don't let anyone else hold the pen"

Ernest

sportsfreaked
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Location: Independence, MO
Motorcycle: 1981 Honda Goldwing Interstate GL1100I
1985 Honda Goldwing Limited Edition gl1200

Re: 1985 LTD Repair of Fuel Low Level Light and Travel Computer Issues

Post by sportsfreaked »

Ernest glad to hear all is well and everything is working. It's funny that a part that is less then I think .50 cents fixes the the fuel light and the travel computer flashing dashes. Safe riding my friend. If the other LTD that you have has the spring and such attached to the travel computer would love to see a pic when you get the bike.
Thanks to all who answer and help. It is greatly appreciated!
Ed

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Rednaxs60
Posts: 2352
Joined: Wed Nov 18, 2015 12:44 pm
Location: Victoria, British Columbia, Canada
Motorcycle: 1985 GL1200 LTD
1995 GL1500 SE CDN Edition
2012 Suzuki DL1000 VStrom
2008 GL1800 (sold)
Ontario 1985 GL1200 LTD (sold)

Re: 1985 LTD Repair of Fuel Low Level Light and Travel Computer Issues

Post by Rednaxs60 »

sportsfreaked wrote:Ernest glad to hear all is well and everything is working. It's funny that a part that is less then I think .50 cents fixes the the fuel light and the travel computer flashing dashes. Safe riding my friend. If the other LTD that you have has the spring and such attached to the travel computer would love to see a pic when you get the bike.
Ed - Thanks. Will ask my brother to have a look and take a picture. Now on to the injectors and air idle valve.
"When you write the story of your life, don't let anyone else hold the pen"

Ernest

sportsfreaked
Posts: 370
Joined: Fri Mar 13, 2015 7:23 am
Location: Independence, MO
Motorcycle: 1981 Honda Goldwing Interstate GL1100I
1985 Honda Goldwing Limited Edition gl1200

Re: 1985 LTD Repair of Fuel Low Level Light and Travel Computer Issues

Post by sportsfreaked »

Ernest you have way too much ambition my friend. Mine is all back together and rides a whole lot better. I did have an issue with engine wine and interference in my headsets. I took off the false tank and everything to check the wiring and grounds and move some stuff no good still. I even took out the new plugs and put in old still no good. I then took the radio out and put it back in and all is well again. Funny I wish I would have done that to start lol. Take care and enjoy your injector project.
Thanks to all who answer and help. It is greatly appreciated!
Ed

User avatar
Rednaxs60
Posts: 2352
Joined: Wed Nov 18, 2015 12:44 pm
Location: Victoria, British Columbia, Canada
Motorcycle: 1985 GL1200 LTD
1995 GL1500 SE CDN Edition
2012 Suzuki DL1000 VStrom
2008 GL1800 (sold)
Ontario 1985 GL1200 LTD (sold)

Re: 1985 LTD Repair of Fuel Low Level Light and Travel Computer Issues

Post by Rednaxs60 »

Ed - after some 30 odd years a good cleaning won't hurt the injectors. Have a trip planned with my HD friends in June for 5 days. Was asked if I was taking the 1800 to which I politely said no, the 1200. Getting it dialed in and I like the way it rides and performs. Expect there will be another wet spell here that will give me a few days to do some more maintenance that is only 30 odd years overdue.

I have had that whine as well. Turned stereo on/off and it has gone away for the time being.

Cheers


"When you write the story of your life, don't let anyone else hold the pen"

Ernest

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