Originally Posted by jwight
Would you mind photographing the inside of your old 451 switch (or sending it to me so I can do it?)
There must be a locking tab or two on on the electrical connector...
Ok, the switch failed this time (failure unknown) and I decided to install the new one I had stored away. The locking tab was my biggest struggle as everything was in a very restricted space with short wiring. After a long struggle, I found out how to unlock it, there is a hole on the top of the connector where you have to put in a long and thin steel pin (in my case, a very thin electronics screwdriver) through the hole to release the tab while prying the connector out at the same time. Sadly, I had to use a vise grip as space was so restricted to take the connector out of the brake switch.
Sorry, I had to crop and compress the heck out of this picture to get it under 9.7kb due to quota but the red circle is where you insert the pin to release the tab.