Stand Alone Hot Rod Engine Wiring Harness
- Thread starter d-max joe
- Start date
most have a core harness price starts around 1300 area last time I looked.I can get a true price for you if you want.
what does the core do for you do they re do the one you give them or?..and yea can you get me a price thanks
They take your stock core harness and take it apart and then put it back together to fit what you said you want. They do them all pretty much on a custom basis per sustomer request is how they explained it to me. I persoanlly did my owm 01 harness and it wasn't that bad to do, but I don't know how much harder the 03+ style would be as I know they made quite a few changes to them in 03+.
PPE will do it as well if you don't want to tackle the task. like henry said it's upwards of 1300 bucks though.
you can do the harness yourself. Its really not that hard. I dont know why companies are selling all these fancy aftermarket "standalone" harnesses when you can take a cheap used factory harness, spend a day working on it, and have the exact same thing... 
ben
ben
Yes as everyone said PPE takes the harness and sets it up the way you want it to run what you want.
I can help you out with it. I just took a factory harness and made it "standalone" in my vw beetle that has a gen III chevy V8 in it. The harness that the gen III V8's use is basically identical to the dmax harnesses, I cut out all the non-essential wiring, and then tied it all together and added the basic wires to "interface" the stock harness with any vehicle the engine might go in (battery power, ignition power, check engine light, crank voltage, and data wire for the OBD port)
I wired it all into a custom mini fuse box so you dont have to reuse the huge factory UBEC (underhood fuse box)
ben
On my 01 I basically started with the connector printouts that I got from ALLDATA. Then go through and find similiar circuits as GM doubled up in many areas of them. The nice part is everything has a plug underneath the fuse panel and unhooks. Many of the colors are the same for each type of circuit(red for hot all the time, orange for hot when the key is on and so on). I just took the connector diagrams and went through after isolating and narowing them down and one by hooked them into the fuse panel and got that part out of the way. Then I took and went through and hooked in the control circuits like A/C and guages and then hooked up the throttle pedal. Once you get down to it and get it sorted out(make lots of notes on paper about which wires to cut out and which are duplictaes that can be narrowed down) it isn't that hard.
Heres a few pics of mine while I was doing it. I was lucky and found enough of the discontinued terminals at my local dealer to integrate it into my stock fuse panel. Also a packard crimping tool is a must have if you need to add in any wires to the factory plugs.
As you can see everything comes together in a central point to make your connections all in one area. You have a main budle that goes to the engine, another bundle up to the ECM and a pigtail off for the TCM, and everything comes back to the central point at the underhood fuse panel.
Heres a few pics of mine while I was doing it. I was lucky and found enough of the discontinued terminals at my local dealer to integrate it into my stock fuse panel. Also a packard crimping tool is a must have if you need to add in any wires to the factory plugs.
As you can see everything comes together in a central point to make your connections all in one area. You have a main budle that goes to the engine, another bundle up to the ECM and a pigtail off for the TCM, and everything comes back to the central point at the underhood fuse panel.
On my 01 I basically started with the connector printouts that I got from ALLDATA. Then go through and find similiar circuits as GM doubled up in many areas of them. The nice part is everything has a plug underneath the fuse panel and unhooks. Many of the colors are the same for each type of circuit(red for hot all the time, orange for hot when the key is on and so on). I just took the connector diagrams and went through after isolating and narowing them down and one by hooked them into the fuse panel and got that part out of the way. Then I took and went through and hooked in the control circuits like A/C and guages and then hooked up the throttle pedal. Once you get down to it and get it sorted out(make lots of notes on paper about which wires to cut out and which are duplictaes that can be narrowed down) it isn't that hard.
Heres a few pics of mine while I was doing it. I was lucky and found enough of the discontinued terminals at my local dealer to integrate it into my stock fuse panel. Also a packard crimping tool is a must have if you need to add in any wires to the factory plugs.
As you can see everything comes together in a central point to make your connections all in one area. You have a main budle that goes to the engine, another bundle up to the ECM and a pigtail off for the TCM, and everything comes back to the central point at the underhood fuse panel.
nice post and pics. I was actually hoping you would see this because I figured you would have good pics and input
ben
Okay gentlemen, maybe you guys can help me out. Like some others, I'm looking to mount a Duramax (2004) in a project truck (1959 Chev 3800 1-Ton Dually 4x4).
I need to wire up this beast soon, but I have a problem. The wiring harness that came with the engine is damaged. Truck was totaled in a collision with minor damage to the engine (broke serpentine belt tensioner) but did severe damage to wiring harness. I need to find the harness that plugs into the ECM for this unit (connects between the engine itself and the truck). I tried buying one, but ended up with the one that mounts closest to the engine. Pics of the harness I need can be seen here: http://rides.webshots.com/album/573597833YJCUdN
If anyone can help me locate this harness, I will be eternally thankful!
Once I get the harness, I'll be back bugging you guys to help me rewire it for stand-alone use in my truck.
Thanks,
Lane
I need to wire up this beast soon, but I have a problem. The wiring harness that came with the engine is damaged. Truck was totaled in a collision with minor damage to the engine (broke serpentine belt tensioner) but did severe damage to wiring harness. I need to find the harness that plugs into the ECM for this unit (connects between the engine itself and the truck). I tried buying one, but ended up with the one that mounts closest to the engine. Pics of the harness I need can be seen here: http://rides.webshots.com/album/573597833YJCUdN
If anyone can help me locate this harness, I will be eternally thankful!
Once I get the harness, I'll be back bugging you guys to help me rewire it for stand-alone use in my truck.
Thanks,
Lane
So where does one get hold of the ALLDATA wiring diagrams? I just gutted the HVAC, radio and heater controls, along with the air bag stuff. There are a few wires that were tied together and I need to know what they are. Under dash and to fuse block in an 07 2500 EC. Thanks!
X2. Subscribing. I've been looking into what's involved in making a "stand alone" harness. Lots of cutting but need to know what to cut first.
http://www.alldatadiy.com/
It is a subscription service that provides factory service manuals to you that you can view online or print off. For my 01 it was actually pretty easy to wire in as GM connects everything with plugs at the underhood fuse panel. I took the diagrams and went over which wires I needed and which ones I could eliminate. I eliminated the wires I didn't need anymore and then went through and hooked in my powers and grounds. Then hooked in 4X4 and stuff like that and lastly ran my extra wires for DSP2 and such. If your swapping in the DMAX cluster though it is best to swap over the entire harness like Bigley did over at the page. He also has a conversion guide you can buy that will give you a general idea of how he did his.
It is a subscription service that provides factory service manuals to you that you can view online or print off. For my 01 it was actually pretty easy to wire in as GM connects everything with plugs at the underhood fuse panel. I took the diagrams and went over which wires I needed and which ones I could eliminate. I eliminated the wires I didn't need anymore and then went through and hooked in my powers and grounds. Then hooked in 4X4 and stuff like that and lastly ran my extra wires for DSP2 and such. If your swapping in the DMAX cluster though it is best to swap over the entire harness like Bigley did over at the page. He also has a conversion guide you can buy that will give you a general idea of how he did his.