A few steps forward, finding that those large yellows look like the EV supply lines!
Actually, very handy finding them there, as they provide two
hugely convenient points to wire in the LEDs suggested above - much easier than having to do this at the ECU box. Lucky you!
Quite common to find a colour change from one side of a connector to the other.
Brake/hydraulic pressure switches
There are three on the car:
1 -
Rear brake lights: switch is built into the brake pedal rubber pad. It closes as soon as your foot touches the pedal. See p.55 on Gabor's circuits,
#319 Brake Pedal. This switch also trips out cruise control, if fitted.
2 -
Main system hydraulic pressure switch: Located under the car, at the rear LH edge of the front subframe, this pressure switch (p.35,
#672 Hydr Pressure) monitors the suspension/brake hydraulic line pressure, and triggers the Pressure Warning on the LH display if pressure is low.
3 -
Brake line pressure switch: This pressure switch (p.84,
#670) is there to tell the suspension ECU when the brakes are applied firmly, which puts the suspension rapidly into Firm, to give body stability and prevent 'dive'.
I would suggest you now install the two LEDs (and resistors) detailed in the sheet above, each fed off the yellow wires you have at that 7-way connector, and run to a convenient Gnd point. This will confirm that they are indeed EV lines, and will also allow you to find out whether the other sensors are operating.
To avoid having to run some wiring inside the car for these LEDs (it's no fun trying to get through the firewall), you could try temporarily positioning them here (just under the scuttle cover), so they can be seen from the driver's seat:
.
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