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07-18-2010, 7:47 PM bri-guy-ga Joined on 06-04-2008 Powder Springs, GA Posts 702 temp gauge not working Put the bike back together and find that the temp gauge is parked on the high side.  I tested the 7v regulator and one from a parts bike and they both reduce current to 7v.  I am using the gauge cluster from the parts bike so the gauge should be good.  Ideas?  oil light comes on with key, then off once bike is running. 1982 GL500i (currently being rebuilt from ground up) NO! Try not. Do or do not do. There is no try - Yoda    Report

07-18-2010, 10:57 PM DaveF Joined on 06-11-2008 Lawrenceville, GA Posts 1,232 Re: temp gauge not working Disconnect the green/blue wire from the temperature sensor mounted at the thermostat and set the ignition switch to the on position. Is the gauge still parked on the high side? Measure the voltage on this wire with it disconnected from the sensor. If the gauge becomes parked on the low side and you measure 7 volts on the wire, the sensor is likely bad. If you measure near battery voltage on the wire, the 7 volt regulator is not working properly.  Since you've already tested the regulator itself the likely problem would be a bad ground connection on the regulator. If you measure near zero volts on the wire, the wire itself is likely pinched to ground at some point. My Web Site 1982 GL500 1983 GL650    Report

07-19-2010, 9:04 AM NOLAVOX Joined on 07-19-2010 New Orleans Posts 3 Re: temp gauge not working Quoted from Dave F above "Since you've already tested the regulator itself the likely problem would be a bad ground connection on the regulator." I would recomend to anyone with any motorcycle that is over 15 years old, to go through the electrical connectors and use de-ox it or any cleaning/ dielectric compound to clean and re establish any dicey connections. Things like chassis grounding points are usually suffering some corrosion due to different metals being joined at that point, just like the top of your battery will. It's sometimes an intermittent ground that will give mechs fits. I have had this issue more than once. I usually just replace the lug and file up some new shiney metal where it attaches. Some truck lite dilectric compound and Voila, demons be gone!!! well, sometimes anyway... J 82 CX Custom.... New Daily Driver 77 CB 750 Chopped Suey in progress 5 years+ 72 Cb 125 Getting married to bike below soon 81 Cb 125 3 NC 50s all sorta apart Hey, I work in MC Junkyard Loads of NC 50 scooter stuff    Report

07-19-2010, 11:58 AM Shep Joined on 01-30-2007 UK.2x1980CX500A Posts 7,647 Re: temp gauge not working Another quick test you can do on the actual temperature sender unit.Put your meter on the 2K setting and one side to the green and blue wire to the sender and the other to ground.Should read around 650 Ohms.This will not tell you if the sender unit is performing correctly through it's temp ranges but will tell if it's kaput if it's way outside that reading. My Music http://www.reverbnation.com/pauldouglas/ Join Just In Case :) http://globalcxglvtwins.hostingdelivered.com/ Id quot circumiret, circumveniat    Report

07-19-2010, 12:08 PM bri-guy-ga Joined on 06-04-2008 Powder Springs, GA Posts 702 Re: temp gauge not working I am thinking sender unit.  Most likely it didn't like being underwater.  Will test it and see what I get. 1982 GL500i (currently being rebuilt from ground up) NO! Try not. Do or do not do. There is no try - Yoda    Report

07-19-2010, 12:41 PM Shep Joined on 01-30-2007 UK.2x1980CX500A Posts 7,647 Re: temp gauge not working If it is the sender unit Good Old Georgefix has them in, CX/GL Temp Sender They are an unusual size and another CX user(Steve F) modified one by cutting off the main part and the contact spigot and then tapped a 1/8 NPT thread into it so a cheap stock car one can be used, http://www.dotheton.com/forum/index.php?topic=10072.120 1/8 NPT Sender I have a kaput one here so may do this mod just for the hell of it as they can cost over £35 UK over here($50 US) but I do have a couple of good spares from my basket cases engines(The gifts that just keep giving<grin> My Music http://www.reverbnation.com/pauldouglas/ Join Just In Case :) http://globalcxglvtwins.hostingdelivered.com/ Id quot circumiret, circumveniat    Report

07-22-2010, 7:12 AM bri-guy-ga Joined on 06-04-2008 Powder Springs, GA Posts 702 Re: temp gauge not working Turns out it was the gauge itself that wasn't working.  I tested the wires like DaveF noted and nothing, tested the line for continuity and got a reading so figured the wire was good.  Had a thought and powered up the parts bike and got a reading with my old set of flooded gauges.  Moved them over and darn-it if I didn't get a reading at the sensor.  Go figure, the flood ones work, but the ones on the parts bike don't. 1982 GL500i (currently being rebuilt from ground up) NO! Try not. Do or do not do. There is no try - Yoda    Report

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