In the first part of this series we disabled the seat safety switch. In this instalment we’ll bypass the safety switch that prevents you from starting the engine unless the brake pedal is depressed.
The Brake Safety Switch is located under the hood on the left-hand side, near the brake pedal.
The switch features a pin. When you press the brake pedal down all the way, the pin gets pressed in as well. A depressed pin closes the circuit between a couple of wires, and allows the engine to start.
Now, you probably could use cable ties (or other approaches) to try lock the pin into the depressed position, but (as before) I am interested in a permanent and fail-proof solution, so didn’t explore that line of thinking.
Unlike the seat safety switch, the connector that plugs into the brake safety switch is not ‘intelligent’, so a simple solution is to just bypass the safety switch entirely. Start by unplugging the connector.
Now, there isn’t a lot of slack on the wires leading into the connector — which makes inspecting it and working on it a bit awkward. To make life a bit easier for yourself, simply feed the connector back past the battery to the other (right-hand) side of the engine compartment. (Mine came out around the dip stick.) That gives you a lot more slack to play with.
The next step is to short two of the wires that lead into the connector. This can be done by simply using some scrap wire as a bridge and jamming it into two slots at the end of the connector, but I don’t see that approach as being particularly robust. Instead I would suggest using a small screwdriver to help release the two purple wires from the connector.
Once you have them released, you just need to connect them in some way that doesn’t risk conducting any electricity to/from any other components in the engine compartment, or the frame. I prefer to do this by simply cutting off the terminals from the end of the wire, stripping them back a bit, twisting the bare ends together, then inserting the exposed ends into an insulated screw connector.
The required pair of wires are now shorted and you should be able to start your lawn tractor without having to depress the brake pedal.
I couldn’t find a nice place to secure the wires on the right-hand side of the engine compartment, so I simply fed the connectors back through to the left-hand side and plugged the original connector back into the brake safety switch. With the purple wires removed this serves no function other than to keep the connectors and wires secured. The screw connector just hangs there — it doesn’t touch anything or need additional support.
That’s it. You’re done.
This whole process can be summarised as “short the two purple wires”, but since I had the photos and was asked how to do this, I figured I’d put together a more comprehensive and step-by-step guide. Hope it helps.