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That's the ABS sensor connector for the front right wheel. If you don't have any ABS error codes then probably someone replaced the hub on that side and hardwired the new sensor all the way back to the ABS block on the other side of the truck.
Appreciate the quick reply's. I just picked this disco2 up a couple weeks ago so I'm working my way through it to see what the previous owner did. Appears to be a pretty stock 2003 SE w/ 52k miles.
Funny you should bring up three amigos as that just popped up over the last couple days driving it around. Not every time I drive it but seems to occur when initially accelerating or braking. I have checked the brakes and they appear to be LR branded. Haven't checked the codes yet.
Funny you should bring up three amigos as that just popped up over the last couple days driving it around. Not every time I drive it but seems to occur when initially accelerating or braking. I have checked the brakes and they appear to be LR branded. Haven't checked the codes yet.
It’s probably the ABS shuttle valve switch, but it might be a wheel speed sensor. There’s no real way of knowing without an ABS code reader. You can rent a Nanocom from somebody in the stickies, or you can buy an ABS Amigo.
if it’s the shuttle valve, you’ll want to replace it and do the bypass option b referenced on this forum. If it’s the wheel speed sensor, that can be replaced, but the jury is split on whether to replace the whole wheel hub in the process.
First, if you're able to read the ABS codes and find the 114:Shuttle Valve Switch Electrical Failure go ahead and do the Option B bypass. Option B bypasses a failed printed circuit connection through which electrical signals for the shuttle valve switches pass. It does not bypass the ABS system; it restores full ABS, Hill Descent, and Traction Control function.
If your truck has the shuttle valve switch electrical failure fault and you do Option B you do not necessarily need to replace the switches themselves. I did Option B on my truck over 9 years ago and didn't replace the switches and all is well. Just test the switches with a multimeter as described in the instructions linked in the sticky.
And FWIW, it's correct that the fact your truck has that connector lying loose does indicate the right front wheel speed sensor has been replaced with the newer style that is wired directly and bypasses the connector, but the cable for the newer style sensors without connectors runs directly to the SLABS computer behind the glove box, not to the ABS modulator on the driver's side in the engine compartment.
I had the exact same ABS symptoms, accelerate and it would come on brake and it would come on. Ran the codes and it was indeed the shuttle valve switch. BUT I didn’t do the option B bypass.
The wires in the original switch were completely deteriorated and the option B theory is that the rest of the connections in the ABS unit are not far behind and will fail and mine might or will, who knows. It takes all of 10 minutes to swap out the ABS shuttle valve switch, I did only that and I’ve been ABS light free for several months.
I am just not a fan of splicing into the loom if I don’t have to. Just a personal preference but I might be forced to do it, or not. Who knows.
Left side sensor looks intact and connected while the right side is disconnected but I'm still not sure if it was bypassed.
connector under abs pump - left side
Assuming the empty hole closest to the connector was the hold-down clip while the empty one to the right of the other two going into the wheel-well was for the connector to the hub. Still investigating...
loose connector under sai pump - alt view
Having the codes checked this week so will know more then. Thanks again for the inputs...
Having the codes checked today so hopefully will know a bit more later this week on the abs. I did check the left side and the speed sensor under the abs pump and it appears to be connected which seems odd to only have one potentially bypassed and the other not. Is it typical to bypass one if the rotor/hub needed replacement only on one side and not do both?
