Dash Lights on braking?

[MadDad]

Ok so here is the first real issue i want to deal with.
Every time I step on the brake, ABS, TC and handbrake lights activate on dash for a short time, any ideas what would cause this? It also says Traction Overheat sometimes but usually within 5 mins of first driving so I don't really believe it!:confused:

[PeterH]

I had a warning light flashing on when applying the brake pedal, also noticed the ABS pump running a lot, kicking in often. Turned out to be the abs accumulator needed replacing. Easy fix, can do it yourself, about a 20 min job.
Sometimes weird messages can pop up, traction overheat type messages, on mine turned out to be the battery was on the way out and not supplying enough voltage, causing the error messages. As soon as I put a new battery in the problem was fixed.
I would check your battery first, could also be the culprit for your lights flashing on braking.
P38's need a good strong battery to run everything properly.

[wayneg]

As Peter, 99.9% its your abs accumulator. Get it swapped ASAP as you will be over working the ABS pump $$$$$$$$$$$$$$$$$. Easy job, just unscrews and refit the new. An oil filter tool like the one in the Pic helps

https://www.aulro.com/afvb/images/imported/2014/09/186.jpg

[daf11e]

The only thing I'd add if you're doing it yourself is depressurise the system first....you'll find method in rave...I think it's something like ign off, press brake peddle 30 times wait a couple of mins, then 4 more times...........

[ian4002000]

I would do a lot of checking before replacing anything.
Check the voltage at the battery when engine off and running.
Check how often and long the ABS pump is running and read up on Range Rover Net about the ABS pump before spending money.....
Its much cheaper this way ....

[p38arover]

How long after start-up from an overnight stop does it take for the brakes to become pressurised. You'll have to release the handbrake before doing this as you want to see when the brake light goes out.

Ann excessive amount of time indicates an accumulator problem.

They are reasonably priced if bought from the UK even including postage. I don't know the current Oz price but when I did mine it was significantly cheaper from the UK.

Replacing them is dead easy. ABS Accumulator Replacement on a Range Rover 4.0/4.6/P38 (http://www.rangerovers.net/repairdetails/braketc/accumulator.html)

[mechanic2you]

I would be checking fluid flow to the pump from the master cylinder first
When these cars don't get serviced properly you can get a build up of debris in the master cylinder reservoir and line causing a restriction to the pump and accumulator
Good luck
( yes you can remove the reservoir for cleaning )

[MadDad]

Awesome folks thanks for the direction. It is fantastic to see how much info and help we get on this site.
Cheers

[mtb_gary]

MadDad

When I cleaned my reservoir a couple of years ago I just used several washes with warm soapy water. Then probably 6 lots of rinses with fresh clean water. Left it outside in the sun for a couple of days to ensure all the moisture was totally out of the reservoir before refitting. The difference between before and after cleaning was astounding. Afterwards I can easily see the fresh brake fluid through the plastic. Plus the filter on the bottom of the tank that was clogged up became its original clean self. Looking and performing well :D

Gary

[Hoges]

Two thorough rinses each with 100ml of methylated spirits will clean out almost all moisture, then simply blow dry with the missus' hairdryer (just say "...It's all for the cause" ;)