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What is wire 348C on the wiring harness?

HmmwvTim

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Hello all, I have searched for what this wire is, but can’t find anything about it. Below are some photos:

The list of military vehicle wire codes:
B64C220C-FB33-4C51-9B37-6A1C39D78824.jpeg

The plate with 348 C code. View from the top behind the alternator.
8E9F7FEB-6121-4989-909A-6A2A61CA9CDA.jpeg23E03BA6-130D-4CF1-96E6-55AF146B510A.jpeg

from the bottom far away:
C3DA72A5-9476-4706-B4C3-86F5D808B670.jpeg
closer
D6483FBC-4676-43BE-A7FC-EA17AA648855.jpeg
up close
71DC7CCF-944B-4BC8-A96F-B6876255DED4.jpeg
 

Action

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I wouldn't go by that first list pic posted above. Use the HMMWV TM for real wire details. There is a 249C under the alternator, but it has nothing to do with steering or oil temp (as shown on that list). I cant see the numbers in your pics. If it is 349, then it should go to a plug with another wire, to the rpm sensor.
 

HmmwvTim

Active member
112
95
28
Location
IL
I wouldn't go by that first list pic posted above. Use the HMMWV TM for real wire details. There is a 249C under the alternator, but it has nothing to do with steering or oil temp (as shown on that list). I cant see the numbers in your pics. If it is 349, then it should go to a plug with another wire, to the rpm sensor.
Definitely 348C
i posted 2 photos of it because it is hard to see. No manual focus on cameras these days. If you look at them long enough, you can make out the 3 and more so the 4. The 8 and C are pretty clear.
 

Action

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348C comes from F on the TCM j1 plug (AC request). The loose end of the wire should just have what looks like a plug in it. It is some kind of electrical diode in the newer trucks. You could also have a 3rd wire with a plug near the horn (258B), and another near the transmission.
 

HmmwvTim

Active member
112
95
28
Location
IL
348C comes from F on the TCM j1 plug (AC request). The loose end of the wire should just have what looks like a plug in it. It is some kind of electrical diode in the newer trucks. You could also have a 3rd wire with a plug near the horn (258B), and another near the transmission.
Thanks again action. I did see it somewhere that it was “AC request (not used)” somewhere. Also it explains why I don't see metal wire at the tip of the wire yet it forms like a metal wire when I bend it.
 

Mogman

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That is not a diode, would serve no purpose as a diode has and uses two leads, that is just a blank plug to keep the connector from shorting to anything.
 
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