- Joined
- Nov 3, 2003
- Messages
- 47,528
I'm not sure if you'll gain enough by taking the time and effort to map out the harness, to make it worth your time. My recommendation is to NOT do it then, unless there is some aspect that is critical to know for your needs.
Because all the wires are marked along their entire length, their function is not the question I'm guessing. But more of where exactly they splice into one another, or where they go to the fuse panel maybe?
Luckily there is rarely a problem with them, so not knowing all the gory details may not lose you anything.
And it's only "loosely" based on factory wiring. Their fuse panel holds more fuses, and they have a few extra power wires here and there. They actually work very well.
Unfortunately even that "loosely based" part won't do you any good since they are not based in any way whatsoever on a '70 or older Bronco. Only on the '71 and later models.
And of course almost none of the colors match factory Ford, so if you needed to keep that aspect for any reason, Painless or custom is your only recourse.
We've always kind of wondered about the lack of diagrams, but none of the manufacturers that I know of do either. Each one of the "big three" (Painless, Centech and American Autowire) have their own unique way of telling the story, but none are like a factory diagram. Maybe they figured that most people can't read a diagram anyway, so came up with their own? I can't even get through an AAW instruction sheet without my head hurting, but most of our customers who've bought one say that it's the easiest method of diagramming they've seen! Go figure...
How closely do you want this to match factory wiring (if at all)?
The big difference is the change from a single pass-through with grommet, a firewall mounted fuse panel with the two rectangular firewall connectors behind it, to the later style with glovebox mounted fuse panel and three (and later, four) pass-through harness branches with grommets.
All of the Bronco-specific harnesses are based at least loosely on the '71 and later wire routing.
For the EFI stuff though, since it's usually stand-alone and all you need are switched 12v, constant 12v, ground and some sensor signals, the main harness does not really have any effect on an EFI installation.
Hope it still fits your needs, but if un-wrapped and route-your-own are preferred, then the Painless and American Autowire, or some other setup are more un-finished than the Centech. Let's you see which wires go where (for the most part) and if you want to re-route some it's as simple as cutting a few zip ties.
Paul
Because all the wires are marked along their entire length, their function is not the question I'm guessing. But more of where exactly they splice into one another, or where they go to the fuse panel maybe?
Luckily there is rarely a problem with them, so not knowing all the gory details may not lose you anything.
And it's only "loosely" based on factory wiring. Their fuse panel holds more fuses, and they have a few extra power wires here and there. They actually work very well.
Unfortunately even that "loosely based" part won't do you any good since they are not based in any way whatsoever on a '70 or older Bronco. Only on the '71 and later models.
And of course almost none of the colors match factory Ford, so if you needed to keep that aspect for any reason, Painless or custom is your only recourse.
We've always kind of wondered about the lack of diagrams, but none of the manufacturers that I know of do either. Each one of the "big three" (Painless, Centech and American Autowire) have their own unique way of telling the story, but none are like a factory diagram. Maybe they figured that most people can't read a diagram anyway, so came up with their own? I can't even get through an AAW instruction sheet without my head hurting, but most of our customers who've bought one say that it's the easiest method of diagramming they've seen! Go figure...
How closely do you want this to match factory wiring (if at all)?
The big difference is the change from a single pass-through with grommet, a firewall mounted fuse panel with the two rectangular firewall connectors behind it, to the later style with glovebox mounted fuse panel and three (and later, four) pass-through harness branches with grommets.
All of the Bronco-specific harnesses are based at least loosely on the '71 and later wire routing.
For the EFI stuff though, since it's usually stand-alone and all you need are switched 12v, constant 12v, ground and some sensor signals, the main harness does not really have any effect on an EFI installation.
Hope it still fits your needs, but if un-wrapped and route-your-own are preferred, then the Painless and American Autowire, or some other setup are more un-finished than the Centech. Let's you see which wires go where (for the most part) and if you want to re-route some it's as simple as cutting a few zip ties.
Paul
. I mean, this dude does this for a living, and didn't know what was going on with the metallurgy he was seeing on his device. "This stuff is Greek to me. What the heck is going on" 
