BigBlue

It's hard to describe. But you know how the brake pedal feels when you activate the abs? The hard/soft, ratcheting feel? Well mine has started to do that at random when I apply moderate pressure to the brake. I've replaced the rear speed sensor and I did the front hub a while ago. Now I didn't replace the old sensor with the new one that came with it. I would now but the connector got smashed in a fit of rage. Can I just cut the new sensor off the harness and solder it on to the old harness? Any other ideas? I'm 8 miles from 100k. Thanks yall.

BigBlue

Anyone have any ideas?

crobtex

Trade it in on a new Powerchoke?

If it's the same connector and sensor, a GOOD splice and solder job should do the trick.

Where is 100k? I can't find it on the map.

BigBlue

It's right by sedalia. Well wouldn't ya know it, as soon as I hit 100,003 and tapped the brakes the ABS light came on but the truck isn't doing the rough brake pedal thing anymore. I'm

crobtex

Brake fluid?........Bled properly?........Leaks in the lines?........Connections?.......Connections?..... ....And check all the connections.

BigBlue

Brake fluid is full, never had the lines opened, connections are good, no leaks anywhere.

billv45

Shut her down after she's been running a bit and wait about 10-20 seconds and then disconnect one of the vacuum lines close to the master cylinder and listen for the whish. If there isn't any vacuum left in the line you probably have a leak. Get a Mity-Vac and test each circuit and find out which isn't holding vacuum. Is your BRAKE light on too?

scuzman00

Heck BB, The way you drive, who needs brakes???? I thought the only pedal you mashed was the GO pedal.....

Gary

BigBlue

Brake light is on as well. I test that after I get the truck home. Any particular vaccum line I should look at? The truck stops great. Just as good as it ever has. Just this random rough stuff.

scuzman00, it's hard to set the front nose down for a corner without the brakes.

jrs_dodge_diesel

Vacuum? Our master cylinders use hydro-boosters (hydraulic) powered by the power steering pump. Is there still a vac line going to it as well?

BigBlue, check out the rear wheel sensor which I beleive is in mounted on the differential. Since its a magnetic pickup the sensor may have gotten gunked up from the wear metals in the gear oil.

BigBlue

I just changed the rear wheel sensor about 10k miles ago but I'll change it again since it's under warranty. I tested out my ABS today and guess what, 7200lbs of lifted 4x4 truck sliding sideways at 70mph with the brakes on the floor is not what I call fun.

BigBlue

Well I went ahead and cut and soldered the wires together. I tried taking the wires out of the old sensor and putting the new wires in but that didn't work so I cut and spliced. I've got the batts unplugged for now letting the computer reset itself. I'll let yall know if that fixes it or not.

BigBlue

No go on the sensor. ABS light is still on and I still don't have ABS. I unplugged the harness from the ABS controller to try and reset it that way (did that on my roommates truck and it worked) so we'll see if that helps.

BigBlue

Just plugged the module back in and sure enough the lights are still on.

Jim Dynomite

Could it be the front ABS sensors? Mine lit the ABS light when the front wheel bearing went bad. I guess it knocked the tone ring off.

It wasn't very long before the bearing grenaded and tore up the rotor.

.................Jim