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I noticed on my 2002 Chevrolet Suburban that there’s a cable under the bonnet that’s unplugged and I’m trying to work out where it goes. I’ve included photos of it and where it runs. There’s no corresponding unplugged female connector that I can find anywhere.

I bought the vehicle fairly recently and as far as I’m aware it was unplugged when I bought it. The SUV has no issues except it occasionally gives an ABS warning light — I haven’t yet looked into that problem.

Does anyone know where that cable should be plugged in? Let me know if I need to provide any more info.

Cable top view

Cable route

  • I don't know the Suburban well enough to say definitively, however it is very possible this plug is simply not used. Manufacturers standardize components wherever they can, it's cheaper to make one wiring loom with connections for multiple models and options than customize each one. There could be sensors that aren't needed on your engine, or electrical options your car doesn't have. In any case it's hard to tell because you've drawn over the connector. – GdD Sep 7 at 7:53
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    I can't help off hand either, but you might consider going to a salvage yard and see if they have a comparable model you can compare with if no answer can be found elsewhere. – Jupiter Sep 7 at 11:15
  • In the upper part of the top picture at the opposite end of the arrow (beginning of the line) is a body ground. I'm not sure where your plug goes, either, but think Jupiter's idea may have the best chance of helping you. This same wiring should be found on 2000-2006 Suburban, Tahoe, Silverado, & Sierra models with a V8, so plenty models which correspond. If I still had my '06 Silvy, I could figure it out pretty easily, lol. – Pᴀᴜʟsᴛᴇʀ2 Sep 7 at 12:59
  • Note that manufacturers are pretty careful when it comes to colored coded circuits. Carefully check the colors of the individual wires within the black convolute protective shield. Then find an accurate wiring diagram or electrical troubleshooting guide for that make and model. Wires have base color AND a stripe of color (e.g. “black/blue”) and that’s how they’re marked on each and every wiring diagram. Once you identify the colors involved it should be easy to find the circuit on a diagram. – zipzit Sep 7 at 14:27
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    My guess is the underhood light. Mine was mounted to the hood right above the master cylinder. – mikes Sep 8 at 1:50
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My 2002 Silverado had an under-hood light. It was mounted to the hood on the drivers side above the master cylinder. It may be the power for that.

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