ABS LIGHT, RWABS only, Where is sensor?
#1
ABS LIGHT, RWABS only, Where is sensor?
I have a 1999 F150 that is my baby. She has almost a quarter million miles and the only thing replaced so far is alternator, brake pads, tires, and battery. It has RWABS only, 4.2l 5-speed standard.
Problem: About two weeks ago, I took her to discount tire for a new set of rubbers and those rocket scientists left my parking brake engaged when they drove from the front of the store into their garage. About two miles after I left, my ABS light came on. Auto zone said they could not retrieve diagnostic codes, and my CLYMER manual said something about orange wire and black wire to ground to make abs light flash and manually retrieve codes. I have no idea where these wires are. I have also read several threads and most people end up just cleaning or replacing speed sensor, I cannot find this bugger either. So, I am asking someone if they know where these wires are(supposed to be a connector) and where the rear speed sensor is, as I can just try cleaning it or replacing it. Except for changing tires, I am the only one who has ever worked on this truck, and I intend to keep it that way, so it will keep running as good as it does. I have learned in the past that if you want someone to be careful when they work on your vehicle, well that just isn't possible, you have to do it yourself. Can someone who knows more than me please educate me?
Problem: About two weeks ago, I took her to discount tire for a new set of rubbers and those rocket scientists left my parking brake engaged when they drove from the front of the store into their garage. About two miles after I left, my ABS light came on. Auto zone said they could not retrieve diagnostic codes, and my CLYMER manual said something about orange wire and black wire to ground to make abs light flash and manually retrieve codes. I have no idea where these wires are. I have also read several threads and most people end up just cleaning or replacing speed sensor, I cannot find this bugger either. So, I am asking someone if they know where these wires are(supposed to be a connector) and where the rear speed sensor is, as I can just try cleaning it or replacing it. Except for changing tires, I am the only one who has ever worked on this truck, and I intend to keep it that way, so it will keep running as good as it does. I have learned in the past that if you want someone to be careful when they work on your vehicle, well that just isn't possible, you have to do it yourself. Can someone who knows more than me please educate me?
#3
#6
Checked the ABS sensor........
I pulled the abs sensor and it was covered with a pasty-grey/metallic goop. I cleaned it and connected it to my meter. Does it depend on the axle to complete a ground? The reason I ask is that I got zero ohms.
Does that mean that there is a short circuit in the sensor itself? Could the gunk on the outside of the sensor short circiuted the sensor?
Does that mean that there is a short circuit in the sensor itself? Could the gunk on the outside of the sensor short circiuted the sensor?
#7
The sensor is magnetic, so the gray goo was metal shavings from the gears. As long as there were no chunks big enough to stick in your fingers, it's normal. No, that can't short the sensor.
But a big gouge in the sensor would indicate something broke loose inside & got chewed up, and I've seen THAT short the sensor.
If yours looks smooth (the part that goes into the diff) and doesn't have any blisters, it probably just failed due to age. Get a new one - they're fairly cheap.
But a big gouge in the sensor would indicate something broke loose inside & got chewed up, and I've seen THAT short the sensor.
If yours looks smooth (the part that goes into the diff) and doesn't have any blisters, it probably just failed due to age. Get a new one - they're fairly cheap.
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