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Conductive Grease to fix Wheel Speed Sensor Connections?

 
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Ollie2003LS
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PostPosted: Sun Mar 27, 2011 11:32 pm    Post subject:  Conductive Grease to fix Wheel Speed Sensor Connections? Reply with quote

Hi, (Ď03 3.8 91k) Iím having some trouble with the wheel speed sensor harness on my car. Iíve been experiencing the brake pulse/traction light problem. So far I can fix it temporarily by unplugging and reseating the two front sensor harnesses from the hub. I was wondering if packing the connection with conductive grease would cause any problems. Iíve havenít looked too closely at the connection... Is there a way to re-tension it?
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Lingenfelter
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PostPosted: Mon Mar 28, 2011 6:56 am    Post subject:   Reply with quote

I'm curious to hear an answer! I am also having the same problem you are and I don't really want to start replacing hubs.

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LSdriver
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PostPosted: Mon Mar 28, 2011 10:02 am    Post subject:   Reply with quote

You can get a pair of hubs on ebay for the front of the impala for under 90$ there is a year warranty
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bigdog60
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PostPosted: Mon Mar 28, 2011 11:53 am    Post subject:   Reply with quote

I would be looking at the wiring also. I have replaced the left front wires a couple of times. I always use Die-electric Grease on the connectors.
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Lingenfelter
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PostPosted: Mon Mar 28, 2011 12:32 pm    Post subject:   Reply with quote

Dielectric grease is not conductive, it's just used to protect connections from moisture and corrosion.

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PostPosted: Mon Mar 28, 2011 1:01 pm    Post subject:   Reply with quote

LSdriver wrote:
You can get a pair of hubs on ebay for the front of the impala for under 90$ there is a year warranty


That's a terrible idea. The only respectable hubs for our cars are AC Delco ($$$$$) and Timken (about 90 bucks each). I have read more than enough stories of people buying cheap hubs only to have them fail in 6 months or even worse, be bad out of the box.

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Ollie2003LS
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PostPosted: Mon Mar 28, 2011 6:09 pm    Post subject:   Reply with quote

In my particular case, the issue seems to be a loose connection at the harness where the wires meet the hub. Does anyone see a problem with packing the connection with conductive grease, will this risk shorting the two prongs together or something?

I haven't looked closely at the connection in a while and don't remember if it's one or two prongs and if they're separated or not.

Thanks
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DefEddie
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PostPosted: Tue Mar 29, 2011 4:21 am    Post subject:   Reply with quote

These are common issues with connectors.
When we do it by accident while testing we call it "raping the pins".
Basically the internal catch that contacts the pin will get bent to far back and not make enough contact.
This can also happen if you do not use dielectric,it's known as terminal fretting.
In the case of terminal fretting unplugging and plugging back in will generally repair,but no dielectric will make it susceptible to furthur fretting.

If the pins are raped,which makes them loose and have bad contact-you can generally disassemble the connector and use a small needle to bend the pin contact back down a little bit.
Most but not all terminal's can be repaired that way.

It could also be a damaged connector or wire,but fretting and raped pins are an extremely common occurence on vehicles.
They especially cause issues in systems that depend on measured resistance and digital signal circuits like abs or airbags.

Always put dielectric on any connector you unplug as good general practice.
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PostPosted: Tue Mar 29, 2011 7:31 am    Post subject:   Reply with quote

Just a note... the OP is talking about conductive grease while di-electric grease is completely non-conductive

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Lingenfelter
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PostPosted: Tue Mar 29, 2011 7:51 am    Post subject:   Reply with quote

So nobody knows of a readily available conductive grease?

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PostPosted: Tue Mar 29, 2011 7:53 am    Post subject:   Reply with quote

Lingenfelter wrote:
So nobody knows of a readily available conductive grease?


http://lmgtfy.com/?q=conductive+grease

I'm not so sure it's a good idea in this application... typically, you want to fix the terminals and use dielectric grease

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