uksniper1 Posted April 28, 2010 Share Posted April 28, 2010 hi all,i still have the annoying brake problem on my 1989 3.9 v8 rangerover classic,,ok here goes....my brakes are usualy very good,BUT..every now an again something very odd happens,if i hit a hole in the road or large bump while braking my brake pedal vibrates like mad an i loose all brakes for a couple of seconds,then they come back again..ive changed discs,pads etc,but still does it now an again,and of course its rather scary too!!,so im looking for any ideas on what this could be,i know i had a strange problem in the winter when i went out to the rangie and all 4 brakes were locked on solid,so i undid one of the 2 bleed screws on the booster unit and they freed off again,could i have let air in or some thing causing this problem i have now?..shes done 150 k miles now,so maybe a brake fluid change may help?,or could it be the accumulator?..i just havent got a clue what to try next,an as you can imagine i want to sort it very quickly too,before the brakes go all together,so please any help,or similar experiences?..thanks loads..look forward to you replies..all the best ,wayne. Quote Link to comment Share on other sites More sharing options...
Bowie69 Posted April 28, 2010 Share Posted April 28, 2010 It's the ABS kicking in isn't it? Both my Ranges have always done this, and I don't think there was a problem with it... Quote Link to comment Share on other sites More sharing options...
DC_ Posted April 28, 2010 Share Posted April 28, 2010 If it's clicking away whilst it happens it sounds like the ABS working. Brake fluid levels ok? If your pedal is very soft it might be air in the system. ? Quote Link to comment Share on other sites More sharing options...
uksniper1 Posted April 28, 2010 Author Share Posted April 28, 2010 hi guys,thanks for the replies,ok,the pedal is good,nice an high and hard,the brakes are normally great an stop you dead,fluids is ok,and discs etc,its just when i hit a deep pot hole or deep rut in the road whilst braking,then the brake pedal vibrates,and i cant stop,you can push harder on the pedal and you still are moving just more vibration and no stopping,it lasts for a couple of seconds,or sometimes you can lift off and reapply pedal and alls fine again,,its very odd... Quote Link to comment Share on other sites More sharing options...
Bowie69 Posted April 28, 2010 Share Posted April 28, 2010 Still sounds just like ABS kicking in, I suppose in theory it could be triggering too early, but struggling to see how or why it might happen. Dead shock or wheel bearing maybe? Don't take this the wrong way, but are you an 'enthusiastic' driver? I normally take the pulsing pedal to mean "you're being a bit of a dick Peter, slow down!" Quote Link to comment Share on other sites More sharing options...
uksniper1 Posted April 28, 2010 Author Share Posted April 28, 2010 hi,ive checked wheel bearings an all was fine,and the shocks are new procomps i fitted a while ago now,but they seem good too,lol no im not a 'enthusiastic' driver lol,it happend this morning doing around 20 mph,and i dont go over 50mph to be honest,i wouldda said it was just the abs cutting in too but,it isnt slowing down at all,it just sorta rolls on with pedal shake and no braking is happening,plus this is at low speeds and on good tarmac roads too,so realy there would be no reason for the abs to be taking over as im not heavy breaking at the time i hit the pot holes etc,,,im so stumped at the moment,dont know wot it can be... Quote Link to comment Share on other sites More sharing options...
Simon_CSK Posted April 28, 2010 Share Posted April 28, 2010 hi,ive checked wheel bearings an all was fine,and the shocks are new procomps i fitted a while ago now,but they seem good too,lol no im not a 'enthusiastic' driver lol,it happend this morning doing around 20 mph,and i dont go over 50mph to be honest,i wouldda said it was just the abs cutting in too but,it isnt slowing down at all,it just sorta rolls on with pedal shake and no braking is happening,plus this is at low speeds and on good tarmac roads too,so realy there would be no reason for the abs to be taking over as im not heavy breaking at the time i hit the pot holes etc,,,im so stumped at the moment,dont know wot it can be... To rule out the ABS run with it disconnects for a while. I would have thought it was the ABS also. Quote Link to comment Share on other sites More sharing options...
sheltie50 Posted April 28, 2010 Share Posted April 28, 2010 From memory so could be complete nonsense Was there a relay or solenoid under the passenger seat which does something to the supply or control of the ABS modulator. Quote Link to comment Share on other sites More sharing options...
Bowie69 Posted April 28, 2010 Share Posted April 28, 2010 There is, 3 relays, 2 20A fuses, and one 70A fuse (again from memory ) Unsure which you need to remove to disable the ABS, but one way to find out Quote Link to comment Share on other sites More sharing options...
uksniper1 Posted April 28, 2010 Author Share Posted April 28, 2010 thanks again for the replies,,thats great,ill give it a try an see what happens,once again thanks very much for the replies,,all the very best,wayne. Quote Link to comment Share on other sites More sharing options...
sheltie50 Posted April 28, 2010 Share Posted April 28, 2010 Thanks Bowie69, I think your spot-on, wonder if the problem is a loose conection there. Quote Link to comment Share on other sites More sharing options...
teslo Posted April 30, 2010 Share Posted April 30, 2010 I had almost same sympthoms with loose wheel bearings. Play was not dramatic, but for brakes it was more than enough. Quote Link to comment Share on other sites More sharing options...
uksniper1 Posted April 30, 2010 Author Share Posted April 30, 2010 hi guys,thanks for the replies,well i checked the fuses and and relays under the passenger seat and heres what i found.... all the fuse holders were filled with grease(i mean filled lol),and one of the fuses was half way in,as the connector going into the fuse holder had popped out,so after a good degrease and clean out with a stiff paint brush i set off down our farm track(very rutted an bumpy),,i hit the brakes just as i dropped into a pot hole,and the pedal vibrated .BUT ..then the rangie stopped!!..yippeee,its worked,,i tried a few times and the alls ok,the abs shakes the pedal but she stops just fine now,,so id like to say thank you for all the replies and help guys,and i hope this helps any one in the future if they have the same problem,,all the best...wayne. Quote Link to comment Share on other sites More sharing options...
Simon_CSK Posted May 1, 2010 Share Posted May 1, 2010 hi guys,thanks for the replies,well i checked the fuses and and relays under the passenger seat and heres what i found.... all the fuse holders were filled with grease(i mean filled lol),and one of the fuses was half way in,as the connector going into the fuse holder had popped out,so after a good degrease and clean out with a stiff paint brush i set off down our farm track(very rutted an bumpy),,i hit the brakes just as i dropped into a pot hole,and the pedal vibrated .BUT ..then the rangie stopped!!..yippeee,its worked,,i tried a few times and the alls ok,the abs shakes the pedal but she stops just fine now,,so id like to say thank you for all the replies and help guys,and i hope this helps any one in the future if they have the same problem,,all the best...wayne. Sniper Are you saying that your problem was electrical? Quote Link to comment Share on other sites More sharing options...
Bowie69 Posted May 1, 2010 Share Posted May 1, 2010 IIRC the grease is supposed to be there, in an effor to water proof/corrosion inhibit the terminal, which lets face it are always going to be subject to the traditional LR water ingress. I would re-grease what you have removed, it shouldn't affect the electrical connections really. Quote Link to comment Share on other sites More sharing options...
uksniper1 Posted May 3, 2010 Author Share Posted May 3, 2010 Sniper Are you saying that your problem was electrical? hi mate,yep it must have been ,as all is fine now.she stops on a penny after hitting a pot hole,instead of just sailing on with no brakes at all.. Quote Link to comment Share on other sites More sharing options...
uksniper1 Posted May 3, 2010 Author Share Posted May 3, 2010 IIRC the grease is supposed to be there, in an effor to water proof/corrosion inhibit the terminal, which lets face it are always going to be subject to the traditional LR water ingress. I would re-grease what you have removed, it shouldn't affect the electrical connections really. hi mate,yeah i can see why the grease may have been used originally,as ive sealed an waterproofed all the rangie myself,as i do a lot of deep river crossings in her,but i mean when some one else had greased theese holders they realy had lol..it was everywhere,the holders were full to the top,and all on the connections and even the fuses were full,i left a little in for any flooding in the cabin that may occur,but im happy with the outcome as now i get abs pedal shake if i hit pot-holes whilst breaking, but she stops now instead of brake fail.. Quote Link to comment Share on other sites More sharing options...
Bowie69 Posted May 3, 2010 Share Posted May 3, 2010 Both my 1991 Rangies had mountains of grease on the fuses, I am sure it's a factory job, I would put it back Quote Link to comment Share on other sites More sharing options...
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