primedog

im new to cossie stuff so bare with me

if i turn from 2wd to 4wd do i change ABS set up?

plan is turn my 2wd into 4wd…. i was going to run 2wd rear as thats what i have but run the 4wd up front on the 4wd hubs etc….

i have front and back 2wd ABS sensors (& ecu n loom)
i have front 4wd ABS sensors for hubs.

will - 2wd rear sensors n brakes work with 4wd front sensors n brakes on a 2wd ECU

thanks

The Youth.

iTrader: (1)

the sensors are the same on all sierras yes

the sensors on the escort cos have a different plug

you deffo need a 4x4 abs ecu and you will need to check the wiring diagram in case its different aswell
The wiring is a stand alone loom and can be removed and replaced easy enough but im not certain you need to do this

steve

primedog

ok wicked at least im ok for sensors, il get a 4x4 ABS ecu then if need be a loom to suit thanks for the help!!!

cossie891

iTrader: (1)

I have a red plug 4x4 ecu and loom and a few 4x4 parts if you need them mate

Glenn_

iTrader: (1)

So if your car is 2wd and you put 4x4 running gear in it why do you have to change the abs system too.

natehall

iTrader: (2)

something to do with the fact the 4x4 ABS pulses more often to protect the viscus coupling in the gearbox.

dojj

iTrader: (3)

exactly right

there are extra wires and stuff to do different things

BUT

the 2wd system is better overall, although how it would work to prevent the wheels locking up is a bit vague

the 4wd system effectively "locks" all 4 wheels together when you are slowing down whereas the 2wd set up has effectively 3 different circuits of pulses regulating 2 different circuits of fluid

you should be ok, as it's a bit of a faf to change everything over, it's it's now working then leave it alone would be my vote

primedog

id like to leave it alone if poss as was all working as 2wd but to run 4wd set up im obviously changing hubs and so id be changing the brakes as ther different offset etc….

but if i can run full 2wd ABS but using the 4x4 front brake calipers then thats exactly what il do?!!

dojj

iTrader: (3)

it's only the sensors, if the new hubs have them still in place just leave them alone, they only break when you try to remove them

you don't need to fiddle with anything else, unplug the sensor from the inner chassis rail and plug the new ones back in again, job jobbed

lee2cossies

iTrader: (2)

How do u go about running just the electric pump and no abs? Is it as easy as disconnecting the abs or not? All my sensors are knackered so I need to disconnect.

primedog

my 4wd hubs have sensors in so if i take 2wd hubs off (unplugging 2wd sensors not removing from hub) n put the 4wd on (leaving them in their own hubs n just re-plugging them ones in) - just plug the sensors in and dont do anything else at all….? just want to double triple make sure…. thanks for clearing it up for me

dojj

iTrader: (3)

can't remember who does that subloom but they are available

yes, do just that, there will be white round plugs mounted in the engine bay along the front of the chassis rails somewhere, there will be grommets running through the chassis rails to secure these plugs so just make sure they go back into the proper holes when you slot them back in again

DixieTheKid

iTrader: (2)

Ive just done this, i have a 4x4 saph loom with 2wd ecu. All you need to do is move the roll pins on the ecu so the ecu will plug in. I have no lights on but haven't road tested it yet because the engine isnt it

primedog

how come u changed looms? above advice is to not change anything and keep it all 2wd ABS loom n ecu just plug the front sensors in wen hubs aare changed….

Richie.

iTrader: (5)

I converted my Saff to 4wd and left ABS alone. Never had any issues.

dingla rs

iTrader: (2)

why not run a loom to get ride of the abs ? i don't run it on mine 4x4 cheap mod aswell if you know the right guy not me tho

lee2cossies

iTrader: (2)

Tell me more about not running it! Plus who's the right guy??

primedog

thats what i wanted to hear….one thing tho Richie im guessing u changed to 4wd hubs yes, and iv been told the sensors are all the same so again just a guess but u prob jus plugged in the 4wd ones. il start by doing that ;0)

thanks to all comments…. am also interested in who to see bout the bypass loom etc????