Anybody have or have access to the wiring schematic to a 1990 7.3 4x4? I have a bad positive lead somewhere and narrowed it down to three wires. One is a trailor break wire the previous owner installed, that is def a bad wire (just unhooked it). Now i still have two more wires that are giving me a bad positive lead, the wire coming off the alternator and a wire that routes into a huge bundle, raps in front of the truck and over to the driver side of the truck (when i unhook this wire the truck has NO power).
One...or all three, must be responsible for nucing my new batteries over the winter...
Side note, all three of these problem wires are connected to a plastic motorcroft piece that is mounted in the passenger side on the inside of the fender and has a positive lead directly off the battery. There are also two other positive wires running off this but they are fine.
The wire on the alternator gives me a very dim continuity tester light, while the other wire is very bright when tested. Is an alternator supposed to do that when off? maybe its grounding itself??
I played w it all day till i blew my light in my continuity tester... If anyone could follow my rambling or has any idea to whether these wires are really just fine or they're a bad positive lead feel free to speak...
Thanks in advance!!
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7.3 IDI F-350 4x4 1990
-Custom: '92 interior; Banks Y Pipe, Flowmaster muffler and Dual 4.25" Stacks
-Reman'd: Heavy Duty E4OD and Billet Converter; Transfer Case; Water pump; Power Steering pump; Denso Starter
-New: Brakes; Engine seals and oil pan; Oil pump; RUST-FREE Cab and Bed
-Pro Comp "Holley Red style" electric fuel pump
-3" Body Lift
-Fresh under coating on frame No more face full of rust under the truck!!
-16x10 Eagle Alloy 186 with 33's
-8ft snow plow
4.6l Mustang GT 1997
-Custom side exhaust (no mufflers, Ford Racing Exhaust tips
-Aftermarket stereo (Alpine headunit; JL Component Speakers; JL 300x2 Amp; JL 10" W7 Sub; JL 500x1 Amp)
is the positive batter lead your talking about the larger one that is by itself??
I did remove all the connections at once... I wish i could remember, but i think that three of the four connectors that come off the alternator lit up... The larger one that is by itself and two of the prongs that the wire harness plugs into lit up. The one by itself was a dim light so was one of the wires inside the harness-those two were spliced together between the alternator and that plastic motorcroft piece thats mounted on the fender...I assume that one was a positive lead and one was a battery charge lead???
The alternator ran fine before i parked it last fall...
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7.3 IDI F-350 4x4 1990
-Custom: '92 interior; Banks Y Pipe, Flowmaster muffler and Dual 4.25" Stacks
-Reman'd: Heavy Duty E4OD and Billet Converter; Transfer Case; Water pump; Power Steering pump; Denso Starter
-New: Brakes; Engine seals and oil pan; Oil pump; RUST-FREE Cab and Bed
-Pro Comp "Holley Red style" electric fuel pump
-3" Body Lift
-Fresh under coating on frame No more face full of rust under the truck!!
-16x10 Eagle Alloy 186 with 33's
-8ft snow plow
4.6l Mustang GT 1997
-Custom side exhaust (no mufflers, Ford Racing Exhaust tips
-Aftermarket stereo (Alpine headunit; JL Component Speakers; JL 300x2 Amp; JL 10" W7 Sub; JL 500x1 Amp)
Is the alternator an external or internal voltage regulator....also what is the amperage 70. I have some test info if yours meets the criteria.
__________________ http://photos.thedieselstop.com/show...0/ppuser/28329
93 F250 7.3 IDI S/C XLT 4X4 E40D 3.55LS, Captains chairs, Tutone Mocha, Leer 48" Hiboy cap, FR & RR hitches, full DeeZee running boards. Factory ordered/delivered Jan 93 has 160K+, it's basically a stock truck with all the Ford options, just no disc player.
Toys: 26'Jayco FK TT, 18'Sylvan Pro Fish.
hm.. not sure, i assumed they were all the same on these engines. is there a way to tell whether its an internal or external voltage regulator and what amperage? I haven't replaced the alternator, and it looks stock...
__________________
7.3 IDI F-350 4x4 1990
-Custom: '92 interior; Banks Y Pipe, Flowmaster muffler and Dual 4.25" Stacks
-Reman'd: Heavy Duty E4OD and Billet Converter; Transfer Case; Water pump; Power Steering pump; Denso Starter
-New: Brakes; Engine seals and oil pan; Oil pump; RUST-FREE Cab and Bed
-Pro Comp "Holley Red style" electric fuel pump
-3" Body Lift
-Fresh under coating on frame No more face full of rust under the truck!!
-16x10 Eagle Alloy 186 with 33's
-8ft snow plow
4.6l Mustang GT 1997
-Custom side exhaust (no mufflers, Ford Racing Exhaust tips
-Aftermarket stereo (Alpine headunit; JL Component Speakers; JL 300x2 Amp; JL 10" W7 Sub; JL 500x1 Amp)
Usually on the alternator the amperage is imprinted on the top..... If it is external you will have a voltage regulator on the pax inner fender area.....
__________________ http://photos.thedieselstop.com/show...0/ppuser/28329
93 F250 7.3 IDI S/C XLT 4X4 E40D 3.55LS, Captains chairs, Tutone Mocha, Leer 48" Hiboy cap, FR & RR hitches, full DeeZee running boards. Factory ordered/delivered Jan 93 has 160K+, it's basically a stock truck with all the Ford options, just no disc player.
Toys: 26'Jayco FK TT, 18'Sylvan Pro Fish.
Check your E mail for a picture. [img]/ubbthreads/images/graemlins/smile.gif[/img]
__________________
Bob
My Pictures
1984 Bronco II 4x4 day to day driver : Winter
2005 Explorer Sportrac 4x4 day to day driver : Summer
1991 F350 / Crew cab , Engine 7.3,E4OD tranny. No Turbo but has propane and pyro gauge. The truck is American, complete with a Miles per Hour speedo. Digital trans. temp gauge and voltmeter. Front Captain seats. Control switches for DRL's , Fog lites, High speed idle, Engine kill and scene lites. On board " York " compressed air, Air horns and built in hose reel behind the rear seat. Power bar distribution box from a 1999 Ford Explorer . Checker plate running boards and Frieghtliner mud flaps. LED turn signals in the factory mirrors. DC to AC inverter to run the coffee maker <img src="/ubbthreads/images/graemlins/smile.gif" alt="" /> Soon to be updated with more toys as time & $$$ permit. <img src="/ubbthreads/images/graemlins/smile.gif" alt="" />
WillieTwo-Thanks for the picture!!! Thats awesome, helps alot! Now I atleast know what I'm looking at...
cdnsarguy - if it is an external regulator, would i be getting a continuity light on more than just the negative prong coming off the alternator?? Just not sure why the alternator would be putting out a continuity light on more than just the negative prong.
__________________
7.3 IDI F-350 4x4 1990
-Custom: '92 interior; Banks Y Pipe, Flowmaster muffler and Dual 4.25" Stacks
-Reman'd: Heavy Duty E4OD and Billet Converter; Transfer Case; Water pump; Power Steering pump; Denso Starter
-New: Brakes; Engine seals and oil pan; Oil pump; RUST-FREE Cab and Bed
-Pro Comp "Holley Red style" electric fuel pump
-3" Body Lift
-Fresh under coating on frame No more face full of rust under the truck!!
-16x10 Eagle Alloy 186 with 33's
-8ft snow plow
4.6l Mustang GT 1997
-Custom side exhaust (no mufflers, Ford Racing Exhaust tips
-Aftermarket stereo (Alpine headunit; JL Component Speakers; JL 300x2 Amp; JL 10" W7 Sub; JL 500x1 Amp)
I have little personal knowledge re the continuity light... I have the 1990 tests only......one is 9 pages the other is 16 pages. I have not scanned them to my computer yet for forwarding. Gotta tell me which one you have and I will forward the info for you to decipher. Others with hands on info may be able to help you better/faster.... sorry.
__________________ http://photos.thedieselstop.com/show...0/ppuser/28329
93 F250 7.3 IDI S/C XLT 4X4 E40D 3.55LS, Captains chairs, Tutone Mocha, Leer 48" Hiboy cap, FR & RR hitches, full DeeZee running boards. Factory ordered/delivered Jan 93 has 160K+, it's basically a stock truck with all the Ford options, just no disc player.
Toys: 26'Jayco FK TT, 18'Sylvan Pro Fish.
Ok, I gota change a broken coil over in my car tomorrow so i'll play with the truck then. I'll post tomorrow night with what I come up with.
__________________
7.3 IDI F-350 4x4 1990
-Custom: '92 interior; Banks Y Pipe, Flowmaster muffler and Dual 4.25" Stacks
-Reman'd: Heavy Duty E4OD and Billet Converter; Transfer Case; Water pump; Power Steering pump; Denso Starter
-New: Brakes; Engine seals and oil pan; Oil pump; RUST-FREE Cab and Bed
-Pro Comp "Holley Red style" electric fuel pump
-3" Body Lift
-Fresh under coating on frame No more face full of rust under the truck!!
-16x10 Eagle Alloy 186 with 33's
-8ft snow plow
4.6l Mustang GT 1997
-Custom side exhaust (no mufflers, Ford Racing Exhaust tips
-Aftermarket stereo (Alpine headunit; JL Component Speakers; JL 300x2 Amp; JL 10" W7 Sub; JL 500x1 Amp)
Well, the writing on the alternator is all worn off, so i dont know what the amperage is, but it is externally regulated.
__________________
7.3 IDI F-350 4x4 1990
-Custom: '92 interior; Banks Y Pipe, Flowmaster muffler and Dual 4.25" Stacks
-Reman'd: Heavy Duty E4OD and Billet Converter; Transfer Case; Water pump; Power Steering pump; Denso Starter
-New: Brakes; Engine seals and oil pan; Oil pump; RUST-FREE Cab and Bed
-Pro Comp "Holley Red style" electric fuel pump
-3" Body Lift
-Fresh under coating on frame No more face full of rust under the truck!!
-16x10 Eagle Alloy 186 with 33's
-8ft snow plow
4.6l Mustang GT 1997
-Custom side exhaust (no mufflers, Ford Racing Exhaust tips
-Aftermarket stereo (Alpine headunit; JL Component Speakers; JL 300x2 Amp; JL 10" W7 Sub; JL 500x1 Amp)
Let me scan stuff and send it to you in the early hours.......
__________________ http://photos.thedieselstop.com/show...0/ppuser/28329
93 F250 7.3 IDI S/C XLT 4X4 E40D 3.55LS, Captains chairs, Tutone Mocha, Leer 48" Hiboy cap, FR & RR hitches, full DeeZee running boards. Factory ordered/delivered Jan 93 has 160K+, it's basically a stock truck with all the Ford options, just no disc player.
Toys: 26'Jayco FK TT, 18'Sylvan Pro Fish.
__________________
7.3 IDI F-350 4x4 1990
-Custom: '92 interior; Banks Y Pipe, Flowmaster muffler and Dual 4.25" Stacks
-Reman'd: Heavy Duty E4OD and Billet Converter; Transfer Case; Water pump; Power Steering pump; Denso Starter
-New: Brakes; Engine seals and oil pan; Oil pump; RUST-FREE Cab and Bed
-Pro Comp "Holley Red style" electric fuel pump
-3" Body Lift
-Fresh under coating on frame No more face full of rust under the truck!!
-16x10 Eagle Alloy 186 with 33's
-8ft snow plow
4.6l Mustang GT 1997
-Custom side exhaust (no mufflers, Ford Racing Exhaust tips
-Aftermarket stereo (Alpine headunit; JL Component Speakers; JL 300x2 Amp; JL 10" W7 Sub; JL 500x1 Amp)
Linear Mode
