Range Rover 1990 abs pump burnt out can i replace it with a Range Rover Brake master cylinder from older car and will it pass mot

Ok, your light WILL go out, and go back to normal once repaired, so don't fret.

Unless the pump was really loud (bad internals), you likely burned up the pressure switch (green thing on end of pump), which can be purchased in LA, USA; or through me, GreenDog Oregon (store name on Ebay US). These go out due to the pump running for an extended peroid of time, overheating the entire assembly, and allowing moisture into the pressure switch (Yes, they do go bad, and I have pictures of the inside of a bad one, full of brown muck). The reason this happens is bacause the nitrogen charge in the ABS accumulator (ball like canister attached to pump) has a limited life-span, and goes bad after about 7 years (Rave 2003). This means that the pump must run more often to accomidate braking, as it has no assist.

So, you can replace the Accumulator, and the pressure switch, and will likely be back in commission, after a proper bleeding, of course (directions for proper bleeding in Rave 2003 -CD available on ebay for appx $5)

Or, you could just replace the entire assy with a nkown good used part, and since the switch on the used part will likely be good, you can then just replace the ABS accumulator. The pressure switch is very hard to find, but I do have a couple of sources, here on the West Coast.

If you need further assistance or need a pressure switch (or parts), contact me through my ebay store, GreenDog Oregon. If you have trouble finding my store, just look for P38 and Classic parts, I'll be near the top of the store listings, as my prices are low, due to the low cost of rovers in the NW.

Your car wont pass the mot with the abs light on so no pal it wont pass a test and also if you find a new abs pump it might still leave the light on. it could need turning off with a computer