hi, this morning got in my truck and the brake light was on, so I check the brake fluid and it's ok then I drove the truck and the brake pedal is extra hard, probaly a brake booster problem...... are they a source of problem if yes what can I verify to fix this

thanks

 

As far as i remember, yes when the brake pedal goes hard you have a booster problem. And when this happens, you cant fix it, needs to be replaced.

 

thanks for the fast reply, this was the anwser that I was affraid of

 

I forgot something, is it the same brake booster for all year, I have a 1990 cherokee

 

not sure if its the same but while your doing this you might want to upgrade your master cylinder as well.. You get better breaking with the swap.. Ima look for the thread about the master cylinder upgrade as well as if the boosters are interchangable.

Thats what i was referring to about the master cylinder dual diaphragm.. Post below me

 

IIRC you can bolt up to a 94' year...I think... 95+ got a dual diaphram, which if you have the time(free day) go this route tons of writeups on this(use a 95-96). 97+ you have to swap the pedal assembly.

I switched to a dual diaphram and used all remaned parts(master cyl. booster, etc.) for about $200

 

in a salvage yard near were I work there is a '98 so I could take all the assembly with the pedal and it would give me better braking

 

Yes, lock'em up, scared cat on a couch cushion, better braking !

You might have to get creative on routing the lines from the proportioning valve to the MC. I installed a 96 MC and the outlets are on the opposite side, so the lines went under the MC to the outlets. Also you may need bubble flare adapters that go to standard 3/16" flares. Metric flares on a bubble flare will fit and seal when not being used, but when you get romper stomper on the wide pedal, they'll leak. I'm not sure on a 98 though, but your local parts house will have everything to make it work. Grab the brake light switch too, you'll need that. Tons of write ups on doing are out there. Good luck!

 

thanks, now I know what I'm going to do in my chrismas days off

 

make sure you sheck the vacuum hose to the booster for vacuum and make sure the fitting is not broke

 

on my truck it is not a vaccum booster it look like an electric booster

 

so there is no problem by replace this electric unit by a vaccum one???

 

well no awnser...... guess it is going to fit

 

Never take a guess, ull end up diggin yourself and your pocket a bigger hole to rest in.. Im not sure about the answer you need but ive never really seen a electrical booster... there is an electrical connection on the MC but i think that would be for ABS.. again im not sure about your situation other than upgrading to the dual diaphram MC. Keep asking around.. also use google..