Centre console brake warning light - 1985 Mondial QV

Hi.

Does anyone know what causes the brake warning light to appear on the centre console, by the gear shifter on a 1985 Mondial QV Euro Coupe?

The car had a brand new replacement fuse board just before I bought it, I noticed all three plugs to the console were not plugged in (Didn't light up). So when I plugged in the connectors, it lit up the brake warning lit, washer bottle light and service light - although it has just had a service + cam belts done.

I reset the service light switch and that is ok now, that in turn extinguished the amber status bar light on the console bottom. However the brake warning light is still on and the red status bar light on the console bottom is on.

Just wondering if the brake warning light is triggered by a brake pads sensor or pedal brake or brake light bulb or something? (Brake fluid levels and sensors to the fluid reservoir look fine).

Any help appreciated, the car runs and brakes fine.... is there any way to reset this light or is it depending on a failed component being replaced/wiring fixed?

Thanks
Mike
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I appreciate the advice so far folks.

Do you know where can I find the brake differential pressure switch and does anyone have a photo of it?

The brakes warning light on the dash does not come on, so I'm assuming the front brake pads are OK and the parking lamp comes off when I release the hand brake.

I guess the next job is to bleed the brakes, check the pads.

Is there anything which needs doing to the brake differential switch, is it detecting low pressure?

 

I had a further look this evening....

Firstly I took off one of the fluid reservoir caps and pressed down on the piston plunger switch to make contact i.e. to simulate low fluid level. With the key on the in the ignition (prior to actually turnine the Engine over), the warning light on the idiot stack (A) with the exclamation mark does not light up.

So either the bulb is blown / removed! Or there is another wiring gremlin.

I can confirm both rear brake lights work when I depress the pedal.

Where is the differential pressure switch located on ghetto mondial? I assume it's not in front compartment?

So photos I took are attached for reference ghetto brake switch, master cylinder etc.
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Oops predictive text! Ghetto = The

 

I have managed to finally solve the issue, Afterburner you were spot on:-

1) Checked all fluid sensors and wiring in the brake/clutch fluid reservoir = Ok, disconnected wiring and checked with multimeter
2) Brake proportioning valve = Ok, disconnected wiring and checked with multimeter
3) The front brake pads were worn on the backs and had erroded into the sensor wire, I replaced the brake pads with new Ferodo ones without a sensor wire. = However brake failure light was still on!??
4) Next I removed the dash speedometer+tachometer and took out the Idiot light stack - Bulb was missing from the left brake light warning (Pads)!
5) I replaced the missing bulb = Success the centre console warning light has finally gone out!

So in summary looks like the previous owner/seller, removed the idiot light stack Image Unavailable, Please Login Image Unavailable, Please Login brake warning light bulb and disconnected all 3x centre console light plugs. To hide the fact the front brake pads were shot, also the washer bottle sensor had corroded, service light not reset etc.

Now all of those electrical issues have been sorted!

Thanks for the help folks.

 

Understood. The bulb for the brake brakes warning light in the light stack was missing/removed, that was what was still triggering the brake failure lamp on the centre console (after I replaced the brake pads). Put a bulb in and extinguished the

Yeah understood.... The brake stop light wasn't missing or broken.

The bulb from the brake (!) Warning light on the idiot stack had been removed, to hide the fact the front pads were worn... So hence the missing bulb caused the centre console brake failure light to stay on... I.e. the bulb in the idiot stack light must form part of the circuit

 

Sorry for the multiple replies.... I hate this new forum format, seems to save and screw up cached responses..

 

Thank you Kevin. To take the Speedo/revcounter/idiot light stack - use your fingers to prise off the black plastic bezel on the Speedo and rev counter (held in with friction tabs). That will then reveal 4x black screws which hold each counter in place and the idiot light stack in between. Once unscrewed you just pull them out by hand.... That then reveals all-sorts, sorry I can't remember where the dimmer is located, you may be able to pop it out by looking under the dash? Image Unavailable, Please Login