Starting a 73-79 Wiring Tech Thread
Junior User
Joined: May 2013
Posts: 69
Likes: 0
From: Fort Worth
IIRC the one in your top picture is not used.
The one in your bottom picture with the 90 is for the water sender located on the left side of the front of the motor as your looking at the motor.
The oil pressure sending unit on a 78 400 is located on the top center backside of the block behind the intake.
The one in your bottom picture with the 90 is for the water sender located on the left side of the front of the motor as your looking at the motor.
The oil pressure sending unit on a 78 400 is located on the top center backside of the block behind the intake.
I found the oil pressure sending unit under the vacuum tree in the back of the engine. looks like this:
http://broncozone.com/uploads/monthl...1235953687.jpg
there is a wire connected already. It red with a white stripe. but the white strip is much wider that the white stripe on the wire im trying to identify.
not sure that even matters.
I have foud a few other loose components too.
on the driver side of the carb where the acceleration components are is a loose spring just hanging there. I think there are enough photos floating around the web I can fix that but there is a short black wire hanging off with a spade connector. Its not conneced to anything. I asked the previous owner he said the carb originally came from a new model truck but was the same model carb so it may have "features" that dont get used.
Junior User
Joined: May 2013
Posts: 69
Likes: 0
From: Fort Worth
the "hollow" bolt i referred to is just to the right of the mechanical puel pump. and to the left of the oil filter.
Junior User
Joined: May 2013
Posts: 69
Likes: 0
From: Fort Worth
finally got a day off work...
I found the oil pressure sending unit under the vacuum tree in the back of the engine. looks like this:
http://broncozone.com/uploads/monthl...1235953687.jpg
there is a wire connected already. It red with a white stripe. but the white strip is much wider that the white stripe on the wire im trying to identify.
not sure that even matters.
I have foud a few other loose components too.
on the driver side of the carb where the acceleration components are is a loose spring just hanging there. I think there are enough photos floating around the web I can fix that but there is a short black wire hanging off with a spade connector. Its not conneced to anything. I asked the previous owner he said the carb originally came from a new model truck but was the same model carb so it may have "features" that dont get used.
I found the oil pressure sending unit under the vacuum tree in the back of the engine. looks like this:
http://broncozone.com/uploads/monthl...1235953687.jpg
there is a wire connected already. It red with a white stripe. but the white strip is much wider that the white stripe on the wire im trying to identify.
not sure that even matters.
I have foud a few other loose components too.
on the driver side of the carb where the acceleration components are is a loose spring just hanging there. I think there are enough photos floating around the web I can fix that but there is a short black wire hanging off with a spade connector. Its not conneced to anything. I asked the previous owner he said the carb originally came from a new model truck but was the same model carb so it may have "features" that dont get used.
Junior User
Joined: May 2013
Posts: 69
Likes: 0
From: Fort Worth
finally got a day off work...
I found the oil pressure sending unit under the vacuum tree in the back of the engine. looks like this:
http://broncozone.com/uploads/monthl...1235953687.jpg
there is a wire connected already. It red with a white stripe. but the white strip is much wider that the white stripe on the wire im trying to identify.
not sure that even matters.
I have foud a few other loose components too.
on the driver side of the carb where the acceleration components are is a loose spring just hanging there. I think there are enough photos floating around the web I can fix that but there is a short black wire hanging off with a spade connector. Its not conneced to anything. I asked the previous owner he said the carb originally came from a new model truck but was the same model carb so it may have "features" that dont get used.
I found the oil pressure sending unit under the vacuum tree in the back of the engine. looks like this:
http://broncozone.com/uploads/monthl...1235953687.jpg
there is a wire connected already. It red with a white stripe. but the white strip is much wider that the white stripe on the wire im trying to identify.
not sure that even matters.
I have foud a few other loose components too.
on the driver side of the carb where the acceleration components are is a loose spring just hanging there. I think there are enough photos floating around the web I can fix that but there is a short black wire hanging off with a spade connector. Its not conneced to anything. I asked the previous owner he said the carb originally came from a new model truck but was the same model carb so it may have "features" that dont get used.
Senior User
Joined: Dec 2010
Posts: 335
Likes: 0
Hello fellas. I'm in the process of wiring my truck. My Old Man gave me his Au-Ve-Co kit. Tada!
I thought this would be a good place to put some of the info for you guys. These are for the gauge cluster.
These are for the ignition. The second part number is for heavier gauge wire I believe.
Headlight sockets.
Haven't ran into these yet. Says Ford though.
Ugh.
If you guys need other part numbers PM me. I'll post more as I get into it further.
I thought this would be a good place to put some of the info for you guys. These are for the gauge cluster.
These are for the ignition. The second part number is for heavier gauge wire I believe.
Headlight sockets.
Haven't ran into these yet. Says Ford though.
Ugh.
If you guys need other part numbers PM me. I'll post more as I get into it further.
Senior User
Joined: Dec 2010
Posts: 335
Likes: 0
OK guys. Here is something I learned today.
I'm rewiring my old truck and decided to use a power distribution box like Wyckedcombo17 used in his. I couldn't find a Focus but grabbed one from a 2001 Expedition. I'm not running a ton of stuff, but it'll be handy for adding stuff in the future. The one thing I was concerned about was all the wires hanging out under the thing. It took me awhile, but I figured out how to get things cleaned up.
See those red things? They block in the tangs that hold in the fuse/relay socket. They have their own tangs that need to be pried. They are top and bottom in this pic.
Here it is removed.
And the socket.
The red things come out a little different for the relays, mini fuses and diodes. They work very similar though.
I'm rewiring my old truck and decided to use a power distribution box like Wyckedcombo17 used in his. I couldn't find a Focus but grabbed one from a 2001 Expedition. I'm not running a ton of stuff, but it'll be handy for adding stuff in the future. The one thing I was concerned about was all the wires hanging out under the thing. It took me awhile, but I figured out how to get things cleaned up.
See those red things? They block in the tangs that hold in the fuse/relay socket. They have their own tangs that need to be pried. They are top and bottom in this pic.
Here it is removed.
And the socket.
The red things come out a little different for the relays, mini fuses and diodes. They work very similar though.
Junior User
Joined: May 2013
Posts: 69
Likes: 0
From: Fort Worth
questions about fuseable links and wiring
As I am trying to understand my trucks wiring (while planning to replace and correct the wiring) i have found three possibly 4 fuseable link wires. I only see one on the schematics in my Chiltons. The schematic shows its located between the ignition switch and a connection node to the horn relay and starter relay. There is also a "resistance wire" on the (part one of the schematic) from the cluster to the ignition switch.
question 1: does anyone have a pic of the resistance wire? all the wires under my dash look like normal wires. Not sure what im looking for.
question 2: How many fuseable links am I supposed to have?
question 3:
I have some wires going to my Transmission (C6) but I am not seeing that on my schematics. What do I need to look for?
Thanks in advance for any help answering these questions.
78 Ranger XLT
question 1: does anyone have a pic of the resistance wire? all the wires under my dash look like normal wires. Not sure what im looking for.
question 2: How many fuseable links am I supposed to have?
question 3:
I have some wires going to my Transmission (C6) but I am not seeing that on my schematics. What do I need to look for?
Thanks in advance for any help answering these questions.
78 Ranger XLT
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Top 10 Ford Truck Tragedies
Joe Kucinski
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
Hotshot
Joined: Apr 2009
Posts: 14,333
Likes: 247
From: Stanley, VA
No 1. The resistor wire looks like a normal wire. On the insulation it will say "resistor wire-do not cut or splice"
No 2. Early models only had one fusible link but later ones have more. Three to four sounds right.
No 3. Those are wires for the neutral start switch. The same switch also operates the back-up lights.
The picture is the resistor wire for the ignition. Depending on your model year and options, there could be more under the dash.
No 2. Early models only had one fusible link but later ones have more. Three to four sounds right.
No 3. Those are wires for the neutral start switch. The same switch also operates the back-up lights.
The picture is the resistor wire for the ignition. Depending on your model year and options, there could be more under the dash.
Junior User
Joined: May 2013
Posts: 69
Likes: 0
From: Fort Worth
No 1. The resistor wire looks like a normal wire. On the insulation it will say "resistor wire-do not cut or splice"
No 2. Early models only had one fusible link but later ones have more. Three to four sounds right.
No 3. Those are wires for the neutral start switch. The same switch also operates the back-up lights.
The picture is the resistor wire for the ignition. Depending on your model year and options, there could be more under the dash.
No 2. Early models only had one fusible link but later ones have more. Three to four sounds right.
No 3. Those are wires for the neutral start switch. The same switch also operates the back-up lights.
The picture is the resistor wire for the ignition. Depending on your model year and options, there could be more under the dash.
Awesome, Thank you. Back up switch is on my schematic.
Hotshot
Joined: Apr 2009
Posts: 14,333
Likes: 247
From: Stanley, VA
A resistor wire is just that, it has a specified resistance. A fused wire or fusible link will measure nearly 0 ohms resistance when you use an ohmmeter.
If you're talking about the stock gauges, they get their power from the ICVR on the back of the instrument cluster and it measures around ~5.5 volts.
Hotshot
Joined: Apr 2009
Posts: 14,333
Likes: 247
From: Stanley, VA
Why are you wanting to do it this way? Are you talking about the stock gauges? Which resistor wire are you wanting to use? Different resistor wires have different values so they have different voltage outputs.
Like I said, the stock gauges are powered by the instrument cluster voltage regulator located on the back of the instrument cluster. This is where you should get your power for the gauges.
This is a picture of the ICVR that should be on the back of the instrument cluster.
Like I said, the stock gauges are powered by the instrument cluster voltage regulator located on the back of the instrument cluster. This is where you should get your power for the gauges.
This is a picture of the ICVR that should be on the back of the instrument cluster.