I bought a water temp gauge for my sled. It's an automotive gauge. I understand that sleds put out ac current and you need dc. I bought a bridge rectifier from Radio Shack. I wired the rectifier in from a plug near the headlight. Yellow power, brown ground correct? I then hooked up the gauge wires and the gauge powers up just fine.
The sender is a one wire type, I understand that the ground comes from whatever you thread it into. I wanted to test it before I drill and tap my thermostat housing. I ran the sending wire up to the appropriate gauge wire, and ran a ground wire around the body of the sender then to a bolt on the motor. The sled was pretty well warmed up so I took the cap off the overflow and hung the sender down in the coolant. The gauge seems to work but the needle is moving back and forth quite a bit, probably a range of say 20 degrees on the gauge face. Any ideas on what I have going on here, why isn't the needle steady?
Thanks
Justin
The sender is a one wire type, I understand that the ground comes from whatever you thread it into. I wanted to test it before I drill and tap my thermostat housing. I ran the sending wire up to the appropriate gauge wire, and ran a ground wire around the body of the sender then to a bolt on the motor. The sled was pretty well warmed up so I took the cap off the overflow and hung the sender down in the coolant. The gauge seems to work but the needle is moving back and forth quite a bit, probably a range of say 20 degrees on the gauge face. Any ideas on what I have going on here, why isn't the needle steady?
Thanks
Justin
