I did a shoddy job repairing my FL wheel speed sensor harness years ago. It was supposed to be a temporary fix, but it kept working so I left it. I did end up tearing it again, but I just repeated the old shit. Fast forward to a couple months ago, my ABS light is coming on and going off again while driving, mostly while hitting bumps or turning. Carried my scanner with me for awhile, pulled the codes while it happened, turns out the FL wheel speed sensor signal is intermittently disappearing. As time progresses, the light comes on and stays on for longer periods of time, until I actually have to wiggle the harness to affect a change. I also believe this hub might have been original. This is relevant since the FR hub went bad a couple years ago. On my truck, the ABS wheel speed sensor, wheel bearing, and hub comes as an assembly, which bolts into the knuckle. It’s possible to buy just the sensor, but it requires taking the hub off the vehicle, and the whole assembly is only $114, for the premium quality unit.
I bought new harness pigtails, for both the wheel speed sensor harness connector (a pigtail is a connector with lengths of wire pre-attached), and the vehicle harness, so that I could create a high quality extension harness that plugs into the existing factory connections, and it would be water tight and pretty. However, when I installed a new hub last night, the new part had a longer harness, and the sub-extension harness creation was unnecessary. AND I bought two of everything, so I can fabricate extension harnesses for both sides. I did the same shoddy job on the right side, but I routed it better, and it hasn’t broken again yet, but I just did that one a couple years ago. I may end up making the extension harnesses eventually or using the parts to better fix the FR, since the FL is now all factory style connections. For clarity, I used butt connectors to splice the harness together that were both unprotected from the elements, and routed in such a way that the connections moved and caused fatigue.
Still trying to track down some steering issues, but I noticed that my front shock bushings are so worn they’re mostly missing, and my front sway bar link bushings are trashed, so I ordered some today to be installed next week-ish.
While my truck was on the rack I had further chances to try and condemn my pitman and idler arms, but it really doesn’t seem like they’re moving erratically to me. The bushings on my FL lower control arm are cracked, and that could be where the clunk I’m hearing is coming from. That control arm is original – since the lift kit install. The steering play has got to be in the pitman, idler arms, or the FL lower control arm (or some combination), assuming the parts I’ve replaced in the past 4 years haven’t suddenly gone bad. Not that I didn’t inspect everything. I didn’t detect any play or see any signs of wear or defects in the parts I’ve already replaced.
It sucks to quickly diagnose and identify faults all day on cars only to be stumped by your daily driver. It doesn’t look like I’m going to be hiring another mechanic any time soon. I have been training the facilities guy on stuff, but I don’t 100% trust him, and don’t want to involve him on my own vehicle. Sooner or later I’m going to end up paying someone else to figure this out.