C15 bxs code for low voltage to vva

Don't quote me on this for sure, but I believe it is all one harness with the injectors and jakes, I had mine replaced when the motor was overhauled, don't remember how much the harness was, but it was alot less than I thought it would be.

 

One thing that might also be your problem is the connection on the side of the head, those harnesses over time let oil into the connection, you can unplug it and spray some electrical cleaner in there and see if that helps. Either way I would replace the harness inside the head and clean connections on outside engine harness.

 

These engines have two harnesses under the valve cover, one for the cylinders 1,2,3 and one for cylinders 4,5,6. Each harness has injector, jake and IVA. So depending on which cylinders, in you case 3 and 5, you may need both harnesses. You probably have a rubbed wire somewhere in the head. Also check IVA connectors, the get brittle from the heat and oil. Here's the parts numbers for the harnessesFront harness 229-7365Rear harness 229-7366

 

You may want to call cat and get the part# for your engine serial#. I have a BXS and show 255-4533 for one at $154.82 and the other is 255-4534 at $137.13.

 

it's a no brainer to just replace both instead of one while your in there.

 

You'll have to pull the valve cover base off of the head to change the harnesses. Not a hard job at all - just a little time consuming.

 

yep a Saturday or sunday afternoon and some cold beers, you will be done in no time.