Ford F150 - 4WABS codes

RobEA · Posted: Tue Jul 18, 2006 8:47 am Post subject: 4WABS codes

On a '99 4.6l v8 4wd, the abs light has come on and remains on. After searching here, sounds like it might be the rear speed sensor although with a 4WABS it might be either of the front 2 as well. Is there any posted procedure to retrieve a 4WABS code and listing of the diagnosis? Would a parts store ODBII(?) reader pick it up? The Haynes book states a few simple things to check and other than those, take it to a mechanic. Any help would be gretaly appreciated. thanks

ROBDOGG05 · Posted: Tue Jul 18, 2006 1:14 pm Post subject: ABS Light

I had the same problem a few months ago. I am still not sure about the light. I baught the speed sensor from kragen. Its like 12 bucks or something. The light went out for like an hour, and then it came back on. Its still on, but i just dont know what to do. I think getting the codes requires you to have a break code reader. Otherwise i have slammed on my breaks and they havent locked up.
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2008 Ford F150 FX4, 6" FAB TECH lift w/ Dirt Logic Coilovers and Dirt Logic 2.25 rear shocks, K&N CAI, Flowmaster Super 44 3" catback exhaust w/ RBP 4" exhaust tip. Hypertech Max Energy Programed. 20" Moto Metal Black wheels with 35" Pro Comp Extreme Mud terrain tires. RBP Rockstar Black grill.

projectsho89 · Posted: Wed Jul 19, 2006 5:38 am Post subject:

To read 4WABS codes requires an advanced OBDII scanner with ABS support. These scanners start at around $1000 per, so most shops don't even have them.

Without a scanner and the DTC(s), you're left with making a few simple resistance checks of the wheel sensors.

Unplug them (there are three) and see what they measure. They typically are around 1000 - 1500 ohms. For the rear sensor, clean off any buildup of iron particles as they can interfere with the magnetic switch.

Steve

ROBDOGG05 · Posted: Wed Jul 19, 2006 7:38 am Post subject: 4WABS

Where are the other 2 sensors located? I Have looked through the repair manual, but i guess i missed that part about 3 sensors
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2008 Ford F150 FX4, 6" FAB TECH lift w/ Dirt Logic Coilovers and Dirt Logic 2.25 rear shocks, K&N CAI, Flowmaster Super 44 3" catback exhaust w/ RBP 4" exhaust tip. Hypertech Max Energy Programed. 20" Moto Metal Black wheels with 35" Pro Comp Extreme Mud terrain tires. RBP Rockstar Black grill.

Steve83 · Posted: Wed Jul 19, 2006 8:13 pm Post subject:

It's very similar to this.

Only you can't diagnose yours with a paperclip.

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. '99 CV RIP

projectsho89 · Posted: Thu Jul 20, 2006 5:32 am Post subject: