I used the EZ wire Harness, the only thing I had any trouble with was the under dash stuff. Mainly the turn signal switch. I got mine all done thanks to making a color wiring diagram, and taping it to the windshield during the turn signal wiring. I have an email able copy if you want one email me. randy.stutz@comcast.net

 

65' and 66' wiring have some differences. be careful

 

Hey camperspecial65! I saw your post on the 65 truck wiring diagrams. It's my next step in restoring my 65 CS and was wondering if you could send me any specifics on where I can obtain a copy. Any help is greatly appreciated!

Ropeta-65-CS

 

I have a 66 f100 custom that the PO had the work done on it & there were to many hands in the fire. I think he took it in as he had the funds, so the wiring is not done right. It drains the battery after around 4 or 5 days. While looking on the net I found this site were someone put up a diag. if you print it as 4 tiles you can paste it back together in 1 big one.
My problem is that they put in a MSD 6al ign, which is not bad but there is a wire in the wrong place. They filed out the hole were the switch goes & put in a after market switch, so now my new switch will not fit. It has a push button over the switch, so you turn on the switch then push the button to start it. So they have the wires all messed up, I think it is wired like the key is on all of the time. I just now printed this one off so I am going to try & find out what they have done. Here is the site.
http://www.justanswer.com/uploads/se...ng_diagram.pdf

Hope this helps it looks like I can at least find out what they have done using this diag. Then I have to try & weld some spot welds & file them so the switch will fit. Any one have a different way I can fix the hole so the switch will ift.
Bill

 

Just starting into the wiring of a fairly "virgin" '65 wiring harness for the f100. I'm helping my 15 year old restore this as his first ride. Anyway, could really use a copy of the wiring diagram if you've got time to email one. wdpete737@msn is my email, any help much appreciated.

 

Glad I came across your wiring diagram info. I was trying to find out if there is a (in-line fuse) somewhere in the charging system for my 65 f250 that your wiring diagram would show?? Or could you possibly direct me on where to find a diagram that would show it's location. I have a new alternator, voltage regulator, starter solenoid, battery, ground cable battery to block. I have cleaned the grounding terminal block mounted to fender well which grounds the alternator, voltage regulator, solenoid etc.. and now still stumped as to why my alternator light on dash still comes on. alternator puts out good but light is still on showing that full charge is not getting back to battery I believe. only thing I can think of now is that there must be an inline fuse involved and possibly bad. don't know what it would look like or where it would be located without a diagram. Would certainly appreciate any direction or help you could provide me with. Thanks much,

 

Do you have a Alternator? or a Generator? AN Alternator is a Generator that has an INTERNAL Voltage regulator and does not need a Voltage regulator.... A Generator has no Voltage regulator built in, and consequently needs an external regulator. If you have an Alternator and are also using a Voltage Regulator that would explain your issue, as you are regulating the Voltage twice......

 

Thanks for the info. I have the original ford shop manuals and in section for charging system it def. shows an alternator , a separate regulator, starter relay and battery. all as part of charging system. The book does not contain any electrical diagrams outside of this primary circuit. I am thinking that an electrical diagram that shows the charging circuitry may show a location of an inline fuse if one exist at all. So am hoping someone here on site will know about possible inline fuse or where I can obtain a wiring diagram for elec. system. Thanks for your reply.

 

Ive got a 65 Mustang in the garage. Other than the length of the wires, all the connectors and the harnesses themselves seem to be made up the same as my 66 F100 for the most part. There are some differences but not many.

The Mustang parts vendors sell most of the harnesses, so that could be an option for people who want to retain an oem looking harness.

 

My truck is a '66 F100, but I would bet the electrical system is similar to yours. My factory shop manual is for a '66, so some of the numbers may not match yours exactly, but you should be able to find the same things. Group 13 - Charging System, page 13-2, Figure 1 shows the wiring diagram for the Autolite Alternator System - Indicator Light. Page 13-4 shows the trouble shooting logic tree for "Charge Indicator Light Stays On. Note 3 says check the operation of the voltage regulator. Even though you have a new one, it may be defective or there may be a wiring error. You're getting good output from the new alternator? Does it still measure good coming out of the regulator? Neither my '66 Wiring Diagram nor my '66 Owner's Manual electrical section say anything about there being an in-line fuse. Hope this is of some use to you.

 

Mr. Mustang Inc., can't recall name of auto electric company they contract with, offer reproduction harness for 64 thru 67 F100 wire harness, which don't believe vary much from the Mustang harness??

 

I would think all the wiring would be the same, but I don't think the lengths would. I've got a 65 mustang and a 66 pickup side by side and the proportions are way off. I'd bet all the connectors would be the same if you want to extend wires as needed.

PS. it just dawned on me, I have an extra 65 cab if you need anything off of it. I just bought a 66 to replace mine on the 65 so I'll have a complete cab and chassis left over when I'm done.

 

this INFO is incorrect, both generators and alternators need a regulator, all the old fords had external regulators on both. Internal regulators came much later, more like the 80s.

the difference between an alternator and a generator is the generator produces DC voltage, the alternator produces AC voltage which is then run threw diods to convert it to DC.

 

if anyone is interested I just went looking around and I have a selection of diagrams as well as component locations for at minimum 1965 and 66.

if someone has a place I can post them all, I will, if not give me your email address and i'll send them out, I have quite a few from different sourses, maybe 20 in jpg form.

 

Great, just wondering if you would mind emailing me electrical diagrams to cover 1965 , 1966 perticulary for the charging system and all under the hood. I would be very grateful if you would. Thanks
By the way, looks like you have a 66 f-250? Question- do you know if there is an inline fuse involved with the charging system anywhere in the circuitry. I have new alternator, new voltage regulator, starter selonoid, grounding cable battery to block and have cleaned any contact points for grounding of charging system that I can find and still the alternator stays on all the time. I know that that can happen if there is a problem with the voltage regulator plug contact pins but the thing is that anytime I disconnect the neg. cable from battery, the engine dies. The alternator is new and putting out charging current to meet specs so shouldn't the truck engine continue running even with the battery disconnected??? This is why I am thinking that there is a inline fuse that has gone bad or there is still a grounding problem somewhere?? May with help of the elec. diagram I can find location of a inline fuse if there even is one at all. any help on this since you have f-250? my email address is : rayejohnson@q.com- and thanks a lot for help thus far.