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What is this symbol from an automotive schematic?

wire with cylinder around it, connected to ground

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That represents the shielding on the cable.

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  • \$\begingroup\$ Oh ok I see, thanks. That just confuses me more though, I'm not sure why there needs to be shielding on that wire. I guess it's not the simple high/low signal I'd hoped for. :o( \$\endgroup\$
    – Jon
    Jan 8 '13 at 23:29
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    \$\begingroup\$ @Jon: The shielding doesn't have anything to do with the signal. The symbol tells you that the ground reference is carried on the outside of the cable, as in a coaxial cable. With blk and the center cable, you can find the signal you're looking for. \$\endgroup\$ Jan 8 '13 at 23:44
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    \$\begingroup\$ Not to disappoint, but it would be unusual that a simple high/low signal would be shielded in an automotive application. It's likely that your signal is either a sensor or one wire communication bus. \$\endgroup\$
    – HikeOnPast
    Jan 9 '13 at 0:58
  • \$\begingroup\$ @HikeOnPast It is a signal from a seat weight sensor (strain gauge) to the ECU, however...there is a module in between which is a black box to me. I'm just trying to guess at what the signal might be, so being shielded I'd guess either a very small voltage, or PWM? Here's the rest of the context (added to original question) \$\endgroup\$
    – Jon
    Jan 9 '13 at 1:50
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    \$\begingroup\$ @Jon, please make a new question (and if possible, restore your prior one here). The goal of the community is to provide useful information to others as well. \$\endgroup\$
    – HikeOnPast
    Jan 9 '13 at 1:55

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