Jump to content

wiring harness nightmare, 98 k2500hd

richard wysong
 Share

Recommended Posts

richard wysong Senior Enthusiast

richard wysong

Posted
Posted

so I had to replace the engine/trans wiring harness in my 98 after the bracket that holds the harness above the front driveshaft broke and the wires got wrapped up in the shaft tearing the wires out of everything. according to the part number for the harness and the discription on GMparts .com fits 98 only and appears to cover many  models. No such thing as new anymore so I got 1 from a wrecking yard in Pa.It looked right so put it in changing all the damaged sensors and switches as I went, also had to change the inner wiring harness in the trans as the plug was damaged and leaking fluid. so I notice extra plugs here and there such as 1 for the encoder which I don't have and a couple others that I have no idea what they are for. my  front 02 sensors  had the same male plugs as the new harness so don't want to splice a good harness change the sensors. left sensor frozen solid, break out the torch and , heat the bung, sensor snaps off. WONDERFUL!!! grind off the welds holding the bung in the pipe and weld a new 1 in. good thing it was the left side cuz no way you could do the right side in the truck. so finish up the bottom with a new driveshaft and go to the top and every thing looks hunky dory, no extra wires everything plugs in like its supposed to EXCEPT the last thing I go to plug in is the plug  to the alternator. guess what the new harness doesn't have that wire. strip the old harness back to see where it goes and it goes to the bulkhead connector. so I try it without it. doesn't charge so I run a 12v wire from switched power to the alternator and it starts charging but then stops. did this fry the regulator? does it use less than 12v to energize the alt? I tried it momentary but as soon as I broke the connection it stopped charging. also now my CEL no longer functions or the 4wd indicator on the floor shift, the underhood lights not working and the underhood PD box seems to have power to the ac fuse and 1 other when the truck is off not sure if this is normal but I'm guessing not. so at this point I'm discusted and ready to just get it to charge make sure the 4wd works and use it for plowing . any ideas on the alternator issue?

richard wysong Senior Enthusiast

richard wysong

Posted
  • Author
Posted

progress! the 4wd issue was a blown fuse, I'm going to have the rebuilder build me a  1 wire alternator to solve that problem. the batteries weren't dead this am so whatever is on is ok and I can live without a CEL. I have a misfire that I didnt have before this happened so will deal with that and the alternator after my VayKay in the sunshine state, leave the plowing to someone else

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing

  • Recently Browsing   0 members

    • No registered users viewing this page.

  • Forum Statistics

    250.4k
    Total Topics
    2.7m
    Total Posts

  • Member Statistics

    342,837
    Total Members
    8,960
    Most Online
    bellssn690
    Newest Member
    bellssn690
    Joined

  • Who's Online   4 Members, 0 Anonymous, 705 Guests (See full list)

  • Latest Articles

  • Posts

    • Chuck FB
      Gas Prices

      By Chuck FB · Posted

      Interesting, I suspect I would have fueled up in Lee Vining as the day prior I would have filled up either in Laughlin or near there and maybe again before I entered Death Valley and once out the other side late that evening as I kept on driving into the night up near Lee Vining. Next morning I most likely fueled up in LV before heading over Tioga Pass into ( as I refer to it as "Yose .... Mite" 😁 ). And again that was 19 years ago but the price then must not have jumped out at me like the 5 bill a gallon theme of nutty cult hippy country Big Sir or head so far up their rear Aspen. I'd be curious to know where the highest prices are in the lower 48, I probably would not be far off to guess somewhere in Cali forn ie. Coldfoot and Prudhoe bay may have those prices beat but that is a whole other world up there and when prices are more normal elsewhere that is about what they can be up there I believe in no mans land. Anyway interesting that the 395 corridor is hosing people and the thing is, its tourist season and its not like there are a lot of competition options when driving up that highway from what I could see. Yup, big ole Boaterhomes and various other RV's ahead and behind me at the Yosemite entrance gate and they have to get their fuel somewhere.  
    • Atlas
      Gas Prices

      By Atlas · Posted

      Those can be high, as well as the big California cities. The ones that will pop your eyes out are the 395 corridor on the Eastern side of the Sierra Nevadas. Lee Vining, $7.19 for regular and $8.89 for diesel is what the Google said right now.
    • newdude
      2020 Trailboss 6.2 replacement

      By newdude · Posted

      Correct.  2019-2021 model years are serviced by a different p/n.  19420611.  Recall 2021s use 19420611.   The recall engines 2022-2024 model years are serviced with 12740076.     The difference between 19420611 and 12740076 is GM changed injector size for 2022.  The injectors are smaller on 12740076 with smaller injector bores in the cylinder heads to match the smaller injectors.  So you can't install a 19420611 in a 2022-2024, and you can't install a 12740076 in a 2019-2021.     Both engines are the replacement engine p/ns that are in the L87 recall.  So both of these are the updated engines.     Here's a version of the L87 recall with the p/ns for all the parts needed.    RCRIT-25V274-7075.pdf   Note it shows 19420611 and 12740076 with an asterisk to a footnote "Use the VIN and the GM Electronic Parts Catalog (EPC) to determine which part to order if two or more part numbers are listed for the same part, as it may vary by vehicle options."    
    • 2017Z
      2020 Trailboss 6.2 replacement

      By 2017Z · Posted

      Looking for advice from this group. Took my flawless 2020 6.2 TB to an unnamed shop for routine rear brakes and oil change. Tech forgot to put oil back in after the full service and needles to say, destroyed my engine.  It’s all on their shop video so they are responsible.   I had my Chevy dealer do the analysis and they confirmed its compromised and said engine replacement. The manager said they only get GM reman engines from GM with full 3 yr warranty and the one they would put in is not same as what’s they are swapping out on 21-25 for recall.    I am looking for advice why that would be a different engine because obviously I had the good 6.2 year and replacing it has my concerns with that recall for 21-15   Also what’s the pros and cons of accepting the engine swap vs telling the shop that bricked the truck to pay up so I buy a new truck. I’m concerned about stigma resale eventually if I just decide to get rid of it after the swap or other issues showing up after the swap out.  
    • GN2018
      AFM Disabler Question

      By GN2018 · Posted

      Just looked up my records.  I've never gone over 5000 miles between oil changes.  At 46K miles, I have 10 oil changes.  I hope that will help.  I also installed the disabler last year.  I've still had a few times when it didn't seem to engage (which I can tell because the start stop feature kicks in), but for the most part, I think it's working.  For some reason, GM did not include the number of cylinders running in the information screen like I had on other models.  In my Cadillac, it shows me when it's running on 4 cylinders on the fuel milage screen.  I can't find that on my '21 Denali.

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...