[Choken]

Hello!
Have an issue on my Bonneville -59.
The cold lamp does not work then I've started the car cold.
Have tested the hot/cold lamps by attach ground to the two wires at the sensor och the lamps light up fine.
I'm going to replace the sensor so I attached the wires to the new sensor and the sensor to ground but then the lamp does not work.
Ok, thought the new sensor was bad to I also tried an used sensor the I know is working but with the same result.
Anyone that has a idea about what's going on??

[gtoguys]

If you ground out each wire separately at the sensor, either the Hot or the Cold lamp will illuminate. If neither lamp lights, you have a wiring issue. If only the hot lamp lights, check the bulb for the cold lamp. Another way to check the sensor, only the cold side, is to use an ohm meter, check to see if you have 0 ohms at one of the terminals to ground. If the sensor was installed into the manifold with Teflon tape or too much thread sealant, the sensor won't ground out.
I hope I made sense with the answer. My 63 GP had the cold lamp problem as you. Mine was the sensor.