As baritonomarchetto mentioned, the lamps are T 3-1/4 wedge-base and pull straight out of the socket.
- You can use normal LED replacement lamps as shown the picture below -- less current, less heat, and longer life than incandescent bulbs.
- The surface-mount style wedge-base replacement LEDs I tried were too big to fit in the rectangular button.
The "start" button to the right of the steering wheel has a microswitch mounted on a plastic thing which also contain the bulb. How do I remove it from the tube with the spring in order to change the bulb, and how do I reconnect it? See picture below, please. It seems to not being able to be turned or anything.
I also have the "cam"-buttons to the left - these went out fine, but I have trouble with getting them to click in or something. There are two white "prongs" (see picture below) on the side of the plastic thing, but I fail to see how they will make the unit grip firmly. I can just pull it back after inserting it.
There are three basic types of LED holders.
- Two of them twist to remove, one does not.
The most common twist-to-remove type is the "tab and slot" style as seen on the round button below.
- You can see the tabs on the button body and the slot on the LED socket.
The other twist-to-remove type is the "bayonet lug" style as seen on the triangular button below.
- You can see the "bayonet lug" nub on the cylindrical body of the.LED socket. There is a matching nub on the other side of the LED socket.
- To assemble this type, line the two nubs up with the slots in the button body, press the socket all of the way in, then turn clockwise about 30 degrees until the nubs click into place and one leg of the plunger aligns with the microswitch actuator.
The third type of LED button is like the rectangular button below.
- You just push the LED socket straight in to the button body
firmly until it clicks together. The square nub (shown clearly in your second photo) keeps the socket aligned with the button body and plunger leg.
- It can be difficult to remove the LED socket from the button body, but a motion that combines rocking, a slight twisting pressure, and pulling seems to do the trick nicely.
Scott