Splice a new ABS wheel speed sensor connector pig tail to old or instal full pigtail?

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by h1ph0panonymous, Jul 30, 2025 at 8:59 PM.

  1. h1ph0panonymous

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    Is it easier to open the wheel cowl and instal the new pigtail into the ECU bus in the rear wheel well or splice the new pigtail to the old one without opening up the wheel well cowl? The terminal connection on my current pigtail was uncrimped from the terminal that connects to the wheel hub speed sensor after an aggressive wheel hub removal.

    Is soldering a must during these type of splices?

    How difficult is just putting the new pigtail in without the splicing route, I feel like the splicing route is cheap lazy way and susceptible to problems in the future?
     
  2. PriusCamper

    PriusCamper Senior Member

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    I've not done this but connecting your own wires usually is more of a problem than plugging into an existing plug. And yes solder give the most reliability but not as easy as a plug. Of course maybe the access is difficult? Or maybe it's not? Hard to say.
     
  3. h1ph0panonymous

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    yeah the wheel well cowl has its own dedicated hole for it with a bunch of rubber like weather long material that will have to be ripped out. I don’t have a solder nor do I know what the hell i’d be soldering and why instead of wrapping it with electrical taping a bunch like an actual splice job requires.
     
  4. PriusCamper

    PriusCamper Senior Member

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    Electrical tape and or crimps or just about any way to connects wires together will be fine, but... If you were a mechanic in a shop your boss is going to say go with spending more time to plug it in because cars that have to return for same job to be done again without payment will bankrupt a shop if its done too often. But for you it'll be your own hassle and no one else's. Maybe try to do the plug method first? Have you looked on here via a google search to see if there's any tips or tricks to getting it done? Also check for youtube videos too.
     
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  5. h1ph0panonymous

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    Sounds about right, so asking a mechanic to do it the lazy way is probably out of the question haha but I bought a full plug and play pigtail from rock auto and just noticed rock auto also sells halfsies for splicing only lol damnit should’ve gotten that one, maybe I will but I’ve waited for too long and been driving with no ABS, traction control of regen braking and can see it’s stressing out other parts of the car that take on the weight of what those inactive parts do like engine running more to invert energy instead of getting it from regen braking and front brakes and suspension is probably taking a hit without its friends in the back doing anything although I see pad wear in the new rotors in the rear, I doubt that’s from just using the parking brake so I’m confused if back brakes do activate on hard brakes or what exactly is going on there maybe that’s just the wear from the new pads sliding over them lol who knows but I’ve been driving like a stereotypical Prius driver since they don’t work for the past month until I fix that sensor connector. Thanks for the motivation but yeah I’ll try to do the full plug and play first if not then maybe I’ll consider splicing a 37 dollar pigtail lol the splice version are only 10 dollars cheaper so oh well
     
    #5 h1ph0panonymous, Jul 31, 2025 at 1:05 AM
    Last edited: Jul 31, 2025 at 1:27 AM