When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
This is a 77 f 150 XLT ranger.
Someone cut into a wire in the harness just as it goes thru the firewall on the drivers compartment side, it looks to be a blueish wire they cut it and added a toggle switch in between it, the section coming from the dash is hot when you turn on the key but nothing happens after that, all lights still work, the switch was put in to interupt the circut but i don't know which one, this was an old trick with hot rodders and truckers to turn off the brake lights so you couldn't be seen slowing down, as in you were hiding from johnny law but in this case everything works, I've looked thru some diagrams and have not had any luck, has someone here done any work on the main harness to knwo what that might be.
Thanks
Aaron
in both of my trucks there original harnesses and have been messed with so trying to repair a forty-year-old harness. Instead, I'm getting 2 new harnesses there a 12 circuit set up with the big colored fuses. There about 174.00 dollars each and make life easier for me
I ran across that website and tried to make sense of it but failed I was hoping someone had better experience than I on this one, I'll try a picture but it most likely won't show under the dash.
Blue sounds like a carb solenoid to me too. Maybe they toggle-switched it to control idle speed. Either moving it up when the A/C is on, or a high-idle speed was needed, or down as needed to avoid run-on/dieseling or being able to idle down on trails.
If it's a 4wd truck with manual trans, I've seen people want to lower their idle speed when crawling a tight technical trail. Especially with EFI.
Just some possibilities.
Definitely post up a pic when you get the chance.
Use these as a grid to read the legion ,look to left and along edge look for C , and across top look between 9 an 10 and trace C over to the 9 area and you will see the carburetor solenoid , the wire is labeled 932 BL , and you can trace it back to the right edge as it changes to 584 GR-BL which dead ends to firewall I believe , now I don't know for sure its your wire but the color is blue and if you look at the plugs you can find them by reading the legion ,The top box on the right shows C-408 an picture of plug for solenoid and is marked in the area were C meets 9 area , the diagrams are good for identifying all the plugs under hood as well and what they are for
A good close up picture of your wire will help , especially to see if its solid blue or has a trace color
I put a new anti diesel solenoid in when I started work on this pickup and the new one works, the old was froze, I haven't noticed anything different with the switch on or off but I'll check in to that and get a picture of the harness. Two wheel drive,auto 400M,air cond.
Nice! That pale green color had the potential to be really ugly, but on our Ford trucks it was one of the nicest looking colors!
Funny how that works. Body shape, or shadow highlights, or whatever. But it works.
No such thing as a 400M by the way.
Just to be nit-picky, but it's true.
Well that would be unusual in my experience I think. It's always been written as "351M/400" and that's the only way I've ever seen it.
But it really comes down to no need for a letter after a 400, because it's literally the only 400 Ford has ever made. Whereas the 351 shares it's numerical identification with no less than three different engines. Not including the Boss, which I'm not that familiar with.
The 351C (Cleveland) and 351W (Windsor) were first at approx. the same time ('69 if I remember?) and the 400 was released in '71 (also, if I remember). The 351C and 400 were in the same engine family as members of the "335 Series" of engines. The 351M was a modified version of the 400, not the 351C as some state.
Once again, if I'm remembering it all correctly. I did not google it but should just to refresh my memory!
I've always preferred to think of the M as standing for "Midland" which was another of Fords plants (like Windsor and Cleveland) but by far the majority of people have settled on "modified" for the meaning of the M after the 351.
But the letters are there simply to differentiate between the different 351ci / 5.8L engines and is not needed for the 400. So it would be strange for an engine decal to say 400M.
Wouldn't be the first time I've been surprised at something someone at Ford did though!
My 400's decal listed 351M/400 as the engine family and after that, 400 as the identifier for my particular engine.
Even though I was aware of how hard it would be to replace, I still went ahead and let the machine shop hot-tank my valve cover! Ending any chance I'd have of keeping it looking original. Oh well.
Would love to see your decal if it does indeed specify it as a 400M. That'd be an interesting find I would think.
I forgot to check the valve cover tag, but I believe your right, I've made the mistake of telling the parts guys 400 M so they get some idea of what is going on, remember there isn't too many old guys left behind the parts counter.
What i did do was a little more testing on the switched wire, turns out it was spliced into either the dura spark or something to do with the ign as it is a kill switch or an anti theft switch, the wire is blue and there is no stripe on it.
Bronco graveyard sells these for $6.50. Is this the correct decal?
Unfortunately not for mine. I believe it was a "D8..." or "D9..." part number anyway, being somewhat unique to possibly the '78, but for sure the '79 model year.
For one, it's for a 351 specifically. And two it's for a vehicle with catalytic converter, where even in CA if your vehicle was above 8500 GVWR you did not have cats.
So it might be for a typical 150/250, but not for the typical F350.
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Slideshow: Called the Fortress, the 850-horsepower pickup combines Raptor underpinnings with military-inspired features, survival equipment, and a starting price of $285,000.
