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Old 05-27-2010, 07:39 PM
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need 85 or so F150 charging circuit wire diagram

where can i view wiring diagram for 85 or similar years full size ford truck altenrator and regulator?

i have to try and repair wiring for a guy who dropped his alternator and ripped his wiring for this.,

thanks!

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Old 05-27-2010, 07:53 PM
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From Autozone.com repair guides.
Sign up is free, and so is the repair info!

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Old 05-27-2010, 09:31 PM
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wow that diagram is way different then this truck is.,

where is the A wire terminal on the regulator for?? this truck has an A terminal on the regulator

A S F and I are the terminals on this regulator


what is the medium sized red with orange stripe wire coming out of the the charging harness at the pass side for? near the starter solenoid? it is hot key in run position only


all of the yellow large and small wires are all for Field and F labeled terminals at the alt and regulator both,
i assume and need to be hot and all tired together yes???

and will it charge correctly if the I voltage regulator wire terminal is not connected to anything? there is no white wire under the hood at all going into the charging harness for this

there is no S terminal white/black wire anywhere under the hood into the charging harness for this either.


next, there is a green wire from the charging harness that i assume is for the EEC relay thing.... i connected it the S terminal directly.
this wire is getting hot and overheating while engine is running,


lastly, i ran a new separate wire directly between the F terminals on the alt and regulator. and thats it for the F circuit,

the engine speeds up and stays running when i pull the pos cable off the batt

its actually an 84 f150

and i cant find the charging diagrams on auto zone specs or repair info sections. non existent from anywhere ive tried to click in the repair and specs sections

and i am trying to do this for him right now dont have much time....


thanks

Last edited by fast68; 05-27-2010 at 10:49 PM.
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Old 05-28-2010, 12:21 AM
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Regulator:

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Old 05-28-2010, 09:57 AM
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Yep, big difference between 1984 and 1985 F150's ... (at least when you assume that it's got a 302 engine) as 1985 was the first year for EFI.

Edit: Now I'm confused. I went back to Autozone so that I could give you navigation instructions, etc. When I got right to the wiring diagram ... it's exactly the same.

Assuming you have already gone through the "Manage My Vehicle" / "Add a Vehicle" steps and have the 1984 F150 as the currently selected vehicle.


1.) On LH sidebar: Click on "Vehicle Repair Guides" hyperlink

2.) RH (main) screen: Click on "Chassis Electrical"

3.) LH sidebar: Click on "Wiring Diagrams"

A new window will appear with diagrams from 1976 to 1986, and the first 2 figures explain how to interpret the symbols and wire codes.

4.) Scroll thru the figures until you find the ones appropriate to your year. 1984 starts at Fig. #15, but the alternator and regulator are in Fig. #16.

5.) Click on the "Enlarge" button to view and/or print the diagram.

Last edited by 66GMC; 05-28-2010 at 10:36 AM.
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