Brakes

[BCC93QT]

Okay, its been a long summer full of countless things i have had to done between the house and work. Now my Q needs some love. I haven't been down to the shop besides every other week to do some maintenance on her. I still have a brake issue i have to sort out. The rear brakes do not work what so ever. They don't even work. My abs unit is out which im thinking is the problem but could it be both calipers stuck?

[lino]

How old are the rear brakes? Has the car been sitting for a long time?

[BCC93QT]

Brakes are fresh, The problem happened about 3 weeks after i put new pads in. It has been up for the winter but i and the owner of my storage garage have had it out on a weekly basis. The E brake doesn't work what so ever and when i have the car on the lift with the wheels off the brakes don't move at all. Bled the brakes front and back until new fluid. Swapped master as well. My abs unit has n't been working since i swapped bodies. i don't think it could be that.But im stuck here, i really don't think both calipers went at the same time but its possible...

[Lokim]

Are they stuck on or off? Check your parking brake cable if stuck on. If stuck off, try tapping the ABS actuator body w/ a small hammer and a piece of wood, as the check valve or solenoid may be stuck...

[Q451990]

My abs unit has n't been working since i swapped bodies. i don't think it could be that.But im stuck here, i really don't think both calipers went at the same time but its possible...

The MC feeds through the ABS unit, so I certainly wouldn't rule it out. Haven't looked, so I don't know, but is it possible to swap the brake lines from the front and rear outputs from the ABS actuator to see if the problem follows? If not, maybe just unscrew the two lines and see if fluid squirts from both of them when you have someone else press the brakes?

Heath

[Lokim]

I have a 92 ABS actuator...

[BCC93QT]

Well i have a spare actuator as well as a million other parts but the actuator has a leak in it. Going to possibley JB weld it and throw it in there to see if it works. I've never seen brakes getting stuck open before, Im thinking when i did the brakes when i pushed the caliper in it might have forced shut a valve in the non working abs unit so im going to check on that today, ill post back with the results. I'm definately sick of driving the lincoln. It doesn't look right for a 23 year old to drive an old mans car but i get alot of comments
thanks for the help as always

[Q451990]

Lots of back seat space in the Lincoln though... get some pimptastic clothes and have fun with it!

[BCC93QT]

LOL im working for AFLAC right now selling life insurance and various insurances, so when i get out of the car all dressed up nice in a suit, tie, and some loafers i get quite the stare. The older folks i sell and renew insurance for ask more about the car than the benefits on the insurance im selling them. But anyway, I gotta get on to this brake issue, haven't been able to get down there im going to head down today

[BCC93QT]

Okay! Update. Got the Q in the shop for some much needed work. Got some pulley bearings on order, fan/ps tensioner. BRAKES! damnit. Still got the hard pedal after bleeding AGAIN until new fluid. rear brakes and Ebrake DON'T work whatso ever. Somehow there is air getting into the lines. No leaks in the line, totally stumped by this. I don't think both calipers failed at the same time nor do i think its my faulty ABS unit but i can't rule it out. I have a leaking one im going to throw in tuesday. Anyone experience this before......................?

[BCC93QT]

Okay, swapped BOTH ABS relays with known working ones. No luck. I just got done patching up the leaking ABS unit and going to swap it out. Due for a sticker as of last week but if i put the Ebrake all the way down and leave it in second gear i think i can get a sticker since the Ebrake patially works in the front and i won't tell them the rear brakes dont work. ABS light still comes on when selfcheck is done. Tried smacking the unit with a rubber mallet a few times, as said above somehow there is air getting in the rear lines but IDK how because there is no leaks. If one caliper was stuck that COULD explain air on one side but both don't work so i really dont know. Now with the leaking ABS unit, im thinking the gaskets are bad? I tried IOS and they don't sell anything BUT the unit itself at a whopping $1,365 give or take some cents.Theres one in the junkyard but thats an active model and do not think it will match. Also i can't get the fricken FSM to load on this crappy computer. Oh and to add on the ABS unit thats in there now is from a 93 body and im running it in a 92. I dont think there is any changes but its possible

[qship96]

E Brake is rear wheels only.....absolutely nothing to do with front brakes......you should have known this if you were studying service manual to help correct your brake issues!!!!!!!!!!

[Infinitiguy19]

Okay, swapped BOTH ABS relays with known working ones. No luck. I just got done patching up the leaking ABS unit and going to swap it out. Due for a sticker as of last week but if i put the Ebrake all the way down and leave it in second gear i think i can get a sticker since the Ebrake patially works in the front and i won't tell them the rear brakes dont work. ABS light still comes on when selfcheck is done. Tried smacking the unit with a rubber mallet a few times, as said above somehow there is air getting in the rear lines but IDK how because there is no leaks. If one caliper was stuck that COULD explain air on one side but both don't work so i really dont know. Now with the leaking ABS unit, im thinking the gaskets are bad? I tried IOS and they don't sell anything BUT the unit itself at a whopping $1,365 give or take some cents.Theres one in the junkyard but thats an active model and do not think it will match. Also i can't get the fricken FSM to load on this crappy computer. Oh and to add on the ABS unit thats in there now is from a 93 body and im running it in a 92. I dont think there is any changes but its possible

Do you know what the code comes up during the self check? Take a video of the codes and I will see if I can convert them into a number form. Or I will photocopy the service manual page if you want.

Do you have a paper version of the service manual?

Your in luck because all Q45a, Q45t and Q45's with TCS as well as Q45's with none of the previous made between Prod.M/Y:0790-0293 use the same ABS actuator: 47600-60U01-

So if you feel up to it swap out the ABS actuator from any 1991-1993 Q45. Make sure you have a gear wrench that has a flexible head. Because the ABS actuator makes removing the wiper motor like cake.

1990 Q45's used a ABS actuator that has seals that leak, they fixed that in 1991.

[Q451990]

So if you feel up to it swap out the ABS actuator from any 1991-1993 Q45. Make sure you have a gear wrench that has a flexible head. Because the ABS actuator makes removing the wiper motor like cake.

I don't remember having any major issues or needing special tools to remove the ABS actuator... of course it's been over 10 years since I did it.

Can you elaborate?

You do want to have a good quality flare wrench for the brake lines - I bought a Craftsman. The cheap ones will flex open and strip the nuts...

Heath

[Infinitiguy19]

There is a bolt right under the ABS actuator that is really hard to get to near the shock tower. Craftsmen tools are the only way to go!

To be fair as well I only removed the ABS actuator only once.

[BCC93QT]

Removal of the ABS unit is cake, i can do it in less than 10 minutes. Like you said the bolt near the shock tower is hardest but i've dropped 2 VH's... compared to that an abs unit is simple to me at this point. Maybe im wrong, i stomp the Ebrake on and it does have some resistence, could be moving the rear slightly? i have to get it on the lift to check that out. Still stumped. Like i said, i patched the spare actuator, i have to get that in to see where im at, but still, this is very wierd at this point. Will keep posting..... And yes i have 3 paper copies but they are all at the shop, i have no time to on my hands to get to the shop. My stupidself should have one in my car but never planed on having to use the Q at this point.

[240RB1]

Did you ever find out what caused your rear brakes to not work?I just bought a q a while back and no rear brakes just the fronts.

[BCC93QT]

Ahh yes I read your article and was going to post but did not as well as post my findings on this post. It WAS the ABS actuator. I still have a stiff pedal my brake booster is bad but the rears have been working. Does your ABS light come on upon self check?? about 9 MPH? That will single it out. Im thinking there is a stuck valve in my faulty one. I have to open it up. They aren't cheap OEM new (1200-1600$) or so? out of a junkyard they still run ya 200-400$ in some cases. The original ABS unit I had in there was the factory 92 which leaked. Then I swapped in a 93 which failed soon after and now I have another 93 actuator in there. Start there

[240RB1]

I will look into fixing the brake problem after i fix the transmission problem.....i read somewhere that buying a poorly maintained q is like getting a high priced hooker or something along those lines.i would have to agree 100% lol.

and no i do not get an ABS light upon startup or after letting it sit/driving.

[BCC93QT]

I have no intentions of fixing the rest of my brake issues since I am only running this Q until 300k and am at 250k now but what year car are you running? The 1st gen G50 runs a different actuator than the 2nd gen maybe its not recognized as a malfunction on the 2nd gen. Does your ABS work?

[240RB1]

My q is a 95model.the only way to get the brakes to work in the rear is to have the whole car off the ground and put it in drive and give it throttle,by doing this the car senses its slipping so the tc system starts to cut engine power and the abs starts to pump the rear brakes.other than that method the rear brakes do not I mean will not grab:'(

[240RB1]

Ok I have fixed the transmission,i have found a hood,next is knocksensors and hoses but for now this instant is the brakes-i bled the system starting at the master cyl then worked back to the rears then back to the fronts,pedal felt slightly better so i drove around but nothing they started to feel the same(would start slowing down with pedal almost all the way to the floor) pads are about 60-70% front and back, i replaced brake fluid in both the master and TC pump resevoiurs(SP?)

i was skimming through the Brake section of the fsm but its not very long or in depth as to what to do in my situation


My first reaction would be to get a new Master cyl since it engages so late but i dont know on this car:( its touchy

Oh and as far as i know yes the abs works,no abs or traction lights on.
Please help this is very dangerous and has left me stumped

[BCC93QT]

Like the previous of my posts. I never fixed it. My pedal is still stiff as hell and I dont care. It doesn't seem to affect stopping ability or excessive wear on the pads. Not to mention my ABS light is still on. I have driven almost 50k miles this issue. The body/interior on my Q is not in good shape so therefore I wont even bother fixing it. I am in the market for another if one comes my way. The body/interior must be good looking other than that I will fix it in due time.

[Infinitiguy19]

240RB you bled the brakes wrong. Always start with bleeder furthest from the Master Cylinder, Then continue closer to it...As shown in the service manual.

Air is compressible!

[240RB1]

Ok,once it warms up a bit il put the Q back up on stands and bleed the system like it says in the fsm(should have done that from the get go lol)

[OwnerCS]

I remember having to bleed mine a couple of times to get it right. On my first try don't think I bled the ABS unit. It has bleeder valves right there on it.

[240RB1]

Ahh thats good to know owner.....il be looking for that bleeder screw also