Honda CX 500 Forum banner
1 - 11 of 11 Posts

·
Registered
Joined
·
18 Posts
Discussion Starter · #1 ·
hey guys



my temp gauge has been intermittent for a couple years. i checked the voltage of the regulator, and it is right at 7 volts. i find it hard to believe a sender going bad. could it be possible that, once a load is on the regulator, that it quits putting out the proper voltage causing the gauge to quit working? just in case the reg is bad, i've purchased the neccessary materials to solder up a replacement. since i've recently converted to an electric fan, it's important that the temp gauge functions properly.



thanks for any help/suggestions in advance!
 

·
Registered
Joined
·
382 Posts
hey guys



my temp gauge has been intermittent for a couple years. i checked the voltage of the regulator, and it is right at 7 volts. i find it hard to believe a sender going bad. could it be possible that, once a load is on the regulator, that it quits putting out the proper voltage causing the gauge to quit working? just in case the reg is bad, i've purchased the neccessary materials to solder up a replacement. since i've recently converted to an electric fan, it's important that the temp gauge functions properly.



thanks for any help/suggestions in advance!




I would suspect a loose connection before anything else. On my GL, I had to dig inside the headlight bucket to find the pertinent connection. Mine was dead, dead, dead but that was only because the gauge wire wasn't plugged into the wire coming from the voltage regulator. Yours being intermittent suggests to me that you have a connection that isn't tight. Think about it: where does the wire get moved? In the middle of the bike where the sensor is or in the handlebars where the gauge and regulator are? It's much more likely to be on the front end.



Be sure to report back when you find the problem. That's how we all learn from each other.
 

·
Registered
Joined
·
8,423 Posts
On the Cxs there are 3 wires involved for the temp gauge e.g Yellow(7v from the regulator for the Gauge,Green for ground(Green is ground for all the bikes)and black for the 12v supply.The connectors in the headlight bucket can get crusty so need cleaning.Same with any connectors involved including the ones on top of the engine to the Temp sensor and Oil sensor.
 

·
Registered
Joined
·
639 Posts
I've had four of these CX/GL motorcycles and they've had an array of electrical woe. 95% of the time, the issue was a loose or corroded connection. Remember that these bikes are 30ish years old now. Clean each electrical connection with a small file so that shiny metal touches shiny metal. Snug up loose connectors by gently squeezing the female end with pliers.
 

·
Registered
Joined
·
839 Posts
hey guys



my temp gauge has been intermittent for a couple years. i checked the voltage of the regulator, and it is right at 7 volts. i find it hard to believe a sender going bad. could it be possible that, once a load is on the regulator, that it quits putting out the proper voltage causing the gauge to quit working? just in case the reg is bad, i've purchased the neccessary materials to solder up a replacement. since i've recently converted to an electric fan, it's important that the temp gauge functions properly.



thanks for any help/suggestions in advance!
I had the same trouble. I tested my 80 reg. to the 81 reg. and found one reading not the same. The 80 reg. showed one resistance value that was higher and it proved to work the temp. gauge properly.

It started that it would show temp. when ever it wanted to. With the regulater replaced the pauge works fine. I think you would find that the regulator is weak.
 

·
Registered
Joined
·
839 Posts
hey guys



my temp gauge has been intermittent for a couple years. i checked the voltage of the regulator, and it is right at 7 volts. i find it hard to believe a sender going bad. could it be possible that, once a load is on the regulator, that it quits putting out the proper voltage causing the gauge to quit working? just in case the reg is bad, i've purchased the neccessary materials to solder up a replacement. since i've recently converted to an electric fan, it's important that the temp gauge functions properly.



thanks for any help/suggestions in advance!
I had the same trouble. I tested my 80 reg. to the 81 reg. and found one reading not the same. The 80 reg. showed one resistance value that was higher and it proved to work the temp. gauge properly.

It started that it would show temp. when ever it wanted to. With the regulater replaced the gauge works fine. I think you would find that the regulator is weak.
 

·
Registered
Joined
·
18 Posts
Discussion Starter · #9 ·
hey fellas, just wanted to say thanks for the suggestions. i wired up a new 7 v regulator and the gauge works all the time now. good deal!
 
1 - 11 of 11 Posts
Top