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i cannot back probe newer GM sensors

posted Mar 28, 2016 02:30:53 by tony redolfi
for example this 2013 equinox I'm playing around with right now,, I wanted to back probe the multi intake air sensor and a tee pin would never fit into this connector so I grabbed one of these thin back probe needles (from one of those line piercer) but it was to short to reach the bare end.

so is there any type of back probe tool that can work with these newer connectors or just pierce the wires.. just wondering what all you guys do

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9 replies
Chris said Mar 28, 2016 03:35:03
Sewing needle
AndyMacFadyen said Mar 29, 2016 07:02:12
Try as above if not pierce or if that won't work sometimes I even scrape the insulation and re-seal with epoxy or silicone.
Sometimes the wires are so fine a gauge that piercing is not an option.
I had the the problem with BMW active wheel speed sensors ( the ones with the blue plugs) in the end I made up a break out lead.
[Last edited Mar 29, 2016 07:04:07]
"Rust never sleeps"
tony redolfi said Mar 29, 2016 15:25:36
break out leads,,, ok that seems like the right direction, thanks for the tip, ill see if I can whip up something.

thanks again
tony redolfi said Mar 29, 2016 17:46:57
ps: do you know what those little metal connectors male/female are called,, I would like to make my own modeled after those 6 way break outs, but don't know what they are called.

update,, after looking for a cheaper set I found one for 40 bucks from china (ebay),,, cant beat that price
[Last edited Mar 29, 2016 17:50:40]
Tyler said Mar 30, 2016 00:02:21
I've run into this as well, on import and domestic makes. Some of the Delphi Micro 64 connectors are almost impossible to backprobe.

I'm NOT looking forward to the day I have to start repairing these kind of connectors...

EDIT: Just had a look at AESwave, turns out they've got a new backprobe set. Looks like this may be the ticket!
[Last edited Mar 30, 2016 00:12:07]
Chris said Mar 30, 2016 02:14:14
The junkyard is a great place to source connectors for building breakouts. I'll salvage as much as I can off harness swaps and build breakouts, plug ins, and jumper harnesses just for those tight and hard to access connectors. A very small sewing needle and even strands of soldered copper wire have been used to bet into connectors.
tony redolfi said Mar 30, 2016 21:00:37
that multi air intake sensor I have on this equinox uses a seven wire connector!! I just counted them... looks like even with that 6 way breakout ill be one wire short.

but I'm sure I can just test half the sensor at a time and just get an error code on the one side not hooked up. half of the sensor is a MAF and the other half is air temp from what I see on the diagram.

I just moved out to south Colorado,, I only passed 2 junkyards so far out around these parts,, I intend to stop by them one day to look for a project work truck, they got mostly older stuff from the 70s lots of old construction vehicles it looks like from the hwy.
carlos gonzalez said Mar 31, 2016 00:12:39
PDM said May 25, 2016 18:29:39
Piano wire is great for those tight connectors and hard to reach spots
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