brakes question before I spend more money

[finallyrangie]

Hello people,
I have recently lost my brakes, careless I know, and before I spend I was hoping someone could either confirm or correct my thinking.

The abs traction control and hand brake lights are on and the abs pump doesn't appear to cycle with ignition or engine running, I belive this means if I am lucky the relay is dead, if I am not then it took the pump with it when it went.

Visual inspection of the relay looks fine and all the fuses seem to be alright as well, I have read that I should change the relay with the pump so will do both if needs must,

Is there anything else it might be before I shell out for an abs pump?

Thanks as always for any suggestions

[Keithy P38]

A dead ABS pump will not cause you to lose brakes. P38's are designed to stop even if the ABS fails.

I'd suggest you have a gems Rangie, if so you might want to replace the mighty plastic o-ring with a suitable metal replacement (of which many here know more about than I).

[mtb_gary]

Finallyarangie

Yes, it could be the pump. But it could also be the accumulator (the black sphere near the pump). Or it could be the brake modulator needs rebuilding if you have a pre 1999 RR and the plastic disc has broken inside.

Does the pump run pretty well continuously?

Gary

[finallyrangie]

Finallyarangie

Yes, it could be the pump. But it could also be the accumulator (the black sphere near the pump). Or it could be the brake modulator needs rebuilding if you have a pre 1999 RR and the plastic disc has broken inside.

Does the pump run pretty well continuously?

Gary



The rebuild kit to replace plastic washers with shiny Stainless ones is ready and waiting to go on, I have just changed the accumulator for a brand new one, that was my first guess,

But the pump doesn't run at all, with ignition or engine running, which is why I am now suspecting the relay, but this is my first taste of the brake system in the p38, so it's all just what I have read here.

1995 vintage so yes to plastic washers

[benji]

Stick some wire in the relay spade bits to manually bypass it to see if the pump works and go from there.

So atm you have un-assisted brakes?

[TeamFA]

A dead ABS pump will not cause you to lose brakes. P38's are designed to stop even if the ABS fails.

That sounds correct. I know even our TD5 Defender's brakes will work perfectly with the ABS module not working.

[finallyrangie]

Stick some wire in the relay spade bits to manually bypass it to see if the pump works and go from there.

So atm you have un-assisted brakes?


Now that's a good idea, I feel like a fool for not thinking of it myself, does anyone know which spades to jump start it, will I damage anything trying out a few options?

Will try that if I get chance after work tonight.

Brakes will just stop me at the end of the drive, if I start early and have a strong enough leg, unassisted would be my best guess

[finallyrangie]

That sounds correct. I know even our TD5 Defender's brakes will work perfectly with the ABS module not working.

My bad, I may have given the wrong idea, I was driving back from work when the warning lights came on, car still stopped fine and I was thinking it was another interesting electrical problem with the display, the next morning there was almost no braking, it will still pull up but I would never try to drive on the road with it.


Sorry for any confusion

[benji]

You need to bridge 30 and 87. Might also be worth checking maxi fuse 2.

If that works the pressure switch would be next to test.

[finallyrangie]

You need to bridge 30 and 87. Might also be worth checking maxi fuse 2.

If that works the pressure switch would be next to test.

Checked the fuses and all is well, then tried bridging the relay and there didn't seem to be any reaction at all, I am guessing this is a bad sign with regard to the pump, oddly when I checked the dash the handbrake light had gone out (in park with handbrake off) but it soon came back on.

I guess I am looking at a new pump and relay

[wayneg]

Them pump should run with the ignition on until full pressure causes the switch to cut power to the pump. A simple test at the pressure switch should prove if the 12v is getting to the switch and a quick continuity test to see if the switch is closed. If all good your pump is faulty if not look for the bad wire / connection

1995 2002 Land Rover Range Rover P38 Wabco ABS Anti Lock Brake Pump Booster | eBay (http://www.ebay.com.au/itm/1995-2002-LAND-ROVER-RANGE-ROVER-P38-OEM-WABCO-ABS-ANTI-LOCK-BRAKE-PUMP-BOOSTER-/191164775791?pt=Motors_Car_Truck_Parts_Accessories&hash=item2c824efd6f)