Harness query

crewman · Post by **crewman** » Wed Jan 28, 2015 7:04 am

Hi was wondering if anyone has seen this before its part of the loom which i believe is VL group A, the white plug seems to have resistors molded into it ,the black plug is just a capacitor. After tracing the wires they seem to go to pins B12 white /blue trace, D8 Grey/red Trace, D2 Black/Yellow trace,C14 Grey wire.

Post by **delcowizzid** » Wed Jan 28, 2015 7:10 am

my VX has a small similar looking cap under the alternator its part of the aircon circuit

Post by **VL400** » Wed Jan 28, 2015 7:12 am

Pins B12 and D8 are fuel trims on the Walkinshaw. D8 for low RPM and D12 is high RPM trim.

crewman · Post by **crewman** » Wed Jan 28, 2015 9:13 am

So since im cleaning up and shortening the loom i guess the question is ......to chop or not to chop? has it any real use as im using 12p

Post by **VL400** » Wed Jan 28, 2015 9:48 am

Its not used in 12P for fuel trims so can be removed (it was actually only in the VN $5D code, the VR $12 code dropped the function). In 12P D8 is the wideband input.

crewman · Post by **crewman** » Wed Jan 28, 2015 9:53 am

Thanks for that VL400 and yeh ive already utilized the wideband input

Dylan · Post by **Dylan** » Wed Jan 28, 2015 10:54 am

Did the race cars use that feature?

Post by **VL400** » Fri Jan 30, 2015 7:59 am

Not sure about the race cars, did they even run a delco? But HSV tweaked the resistors to get the tune spot on. Its in all the $5D code so all production models could potentially use it - the option flag was just turned off so no correction was used.

HQ355 · Post by **HQ355** » Fri Jan 30, 2015 8:22 am

Fairly certain the Perkins cars used autronic pcm's ? And a few others used motech I think ?

Harness query

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