Hi, I have a 2007 1.9tdi Roomster.

The brake warning light comes on when I turn the ignition on the brake warning light comes on. I have changed all the brake pads and the brake reservoir is filled to the correct level. I have disconnected the sensor on top of the reservoir but the light stays on.

The brake pads do not have brake wear sensors on the pads.

The handbrake light goes out when I let the handbrake off.

Any recommendations what I should look at next.

Thank you

The connector on the reservoir is the one that detects if the brake fluid is low, so if you disconnect it, it can't determine if there is any fluid and trigger the warning on the dash, and the brake warning light is the same for when the handbrake is engaged, so it seems normal to turn off the warning when the handbrake is not engaged.

The brake fluid level is on the max line. I did read an article where the fluid level sensor was faulty and to diagnose this see if the light goes out when you disconnect the connector. Tried that but the light stays on. Not sure what to check next. Also read it might be worth continuity testing all the ABS sensors but was going to see if there were any other ideas before tackling that.

24 minutes ago, RDewdney said:

The brake fluid level is on the max line. I did read an article where the fluid level sensor was faulty and to diagnose this see if the light goes out when you disconnect the connector. Tried that but the light stays on. Not sure what to check next. Also read it might be worth continuity testing all the ABS sensors but was going to see if there were any other ideas before tackling that.

the abs sensor if faulty would trigger an abs light, my suggestion is to scan the fault with an obd reader or better with a vcds

30 minutes ago, RDewdney said:

to diagnose this see if the light goes out when you disconnect the connector.

Try shorting the contacts of the loom plug instead, or connect pin 1 (the brown/purple wire) to earth.

It might be that when fluid level is correct, the circuit is made (shorting pin 1 to pin 2, which should be earthed), rather than broken. This would then register a fault for bad/broken connection, as well as low fluid, so a fail safer arrangement.

I have used 2 OBD readers and it says there are no errors even though the brake warning light is .

i jointed the 2 terminals on the connector that goes to the brake reservoir sensor and the brake warning light stayed on.

OK, so there might be a problem with one of the wires going to that connector.

Test that the brown/black wire from contact 2 of that connector has continuity to earth/battery negative, and measure volts on the other contact when ignition is switched on, and check that you see a voltage, relative to battery negative.

One pin gas around 11volts, ignition on but engine not running.mthe other pin has around 70ohms to the earth on the battery. When I joined the pin together the brake warning light stays on and the handbrake warning light flashes. The hand brake light goes back to solid on when the connection better pins is removed.

Is the brake warning light an mot failure item or just am advisory?

Not sure regarding MOT.

70 Ohms sounds high for the earth connection, but if shorting the pins makes different warnings happen it must be getting sensed OK.

Perhaps one of the pads you replaced should have a wear sensor?

Presumably you'd have noticed unplugging the old one though.

Can you post a photo of the warning light?

Photo of thr brake warning light with the engine running.