60 series fuel Solenoid for the Carb

[dannyvp]

I’ve had a fire sometime in my trucks life before I got it.
My fuel solenoid only has one wire, I’m looking for some connections help.
Let me show you what I have.

So two of the wires go to the solenoid. Green and I think the burned off one is yellow?
Where does the black broke wire in the same bundle go?

 

[Gretsch]

I believe that black wire goes over to the carb fan temp sensor. There is typically a sensor on the exhaust manifold that the wire attaches to. I am not sure on this but if you don't have the sensor you can just run it to ground and the fan will just run for 30 minutes when you turn the truck off. With the sensor it runs until cooled I think and then shuts off. The sensor provides a ground for the carb fan to run when it gets hot I think is how it works. To test if this is the correct wire you can ground it and see if your carb fan runs. The sensor is sort of tucked up under things on the manifold more towards the rear of the engine. Easier to see from below. HTH.

Edit: Took some quick pics of the setup on mine:

Wire:

Sensor:

Not the best shots but got tried to get something. HTH.

 

[dannyvp]

I just rebuilt my manifold. Is that sensor on the manifold?

 

[dannyvp]

Where is the carb fan?

 

[Gretsch]

Carb fan sits up on the inner fender. Black thing up near the driver side hood hinge in your photo. Sensor is on the manifold. I think it actually is mounted to a bracket that comes off the intake manifold that puts the sensor near the exhaust manifold if that makes sense. Found a quick photo here on how it looks:

Carb fan here:

HTH

 

[ToyotaMatt]

Carb fan sits up on the inner fender. Black thing up near the driver side hood hinge in your photo. Sensor is on the manifold. I think it actually is mounted to a bracket that comes off the intake manifold that puts the sensor near the exhaust manifold if that makes sense. Found a quick photo here on how it looks:

View attachment 1966616View attachment 1966617

Carb fan here:

View attachment 1966636

HTH

AWSOME Diagrams !

4 @dannyvp

 

[dannyvp]

Good news is I don’t have that switch.

 

[NeverGiveUpYota]

I believe that black wire goes over to thecarb fan temp sensor. There is typically a sensor on the exhaust manifold that the wire attaches to. I am not sure on this but if you don't have the sensor you can just run it to ground and the fan will just run for 30 minutes when you turn the truck off. With the sensor it runs until cooled I think and then shuts off. The sensor provides a ground for the carb fan to run when it gets hot I think is how it works. To test if this is the correct wire you can ground it and see if your carb fan runs. The sensor is sort of tucked up under things on the manifold more towards the rear of the engine. Easier to see from below. HTH.

Edit: Took some quick pics of the setup on mine:

Wire:

View attachment 1966370

Sensor:

View attachment 1966371

Not the best shots but got tried to get something. HTH.

Exactly right. I used a left over junk section of choke cable to go to the sensor since it’s thicker and better able to withstand the heat from the Nani. Others have suggested bicycle cable too.

 

[NeverGiveUpYota]

I just rebuilt my manifold. Is that sensor on the manifold?

It’s on the hard section of pvc pipe that comes off the egr that is in the intake manifold.

 

[NeverGiveUpYota]

Carb fan sits up on the inner fender. Black thing up near the driver side hood hinge in your photo. Sensor is on the manifold. I think it actually is mounted to a bracket that comes off the intake manifold that puts the sensor near the exhaust manifold if that makes sense. Found a quick photo here on how it looks:

View attachment 1966616View attachment 1966617

Carb fan here:

View attachment 1966636

HTH

Great pixs. Exactly how I rerouted mine. Works perfect.

 

[NeverGiveUpYota]

Good news is I don’t have that switch.

Switch? Whatever it is your saying is great that you don’t have... if it’s the carb fan or the temp sensor, you want them. Your truck will run much more flawlessly.

 

[Gretsch]

Exactly right. I used a left over junk section of choke cable to go to the sensor since it’s thicker and better able to withstand the heat from the Nani. Others have suggested bicycle cable too.

When I first got my truck it had what looked like a section of bike cable to connect the sensor. Had like a bike cable section spliced in between two wire sections. Looked just like someone's ratty side of the road fix so I replaced mine with some real wire. I thought someone had done some sort of emergency fix and just never got back to fixing it correctly. But I am guessing now this was done on purpose to handle the heat as @NeverGiveUpYota suggests. Good idea and good to know.

 

[4Cruisers]

When I first got my truck it had what looked like a section of bike cable to connect the sensor. Had like a bike cable section spliced in between two wire sections. Looked just like someone's ratty side of the road fix so I replaced mine with some real wire. I thought someone had done some sort of emergency fix and just never got back to fixing it correctly. But I am guessing now this was done on purpose to handle the heat as @NeverGiveUpYota suggests. Good idea and good to know.

Following @NeverGiveUpYota's lead, I recently fabricated a short section of wire with an updated OEM latching connector for the FJ60 carb cooling system that'll be going into my '71 FJ40 build. I used picture hanging wire for mine.

 

[NeverGiveUpYota]

I used picture hanging wire for mine.

That’s smart! Fred told me about the bike cable but I use what I had on hand... old ratty choke cable.

 

[dannyvp]

This is my spare manifold and my new rebuilt manifold. Neither have that sensor.
My carb fan works though, bc when the key was one and not running someone asked why it was blowing air.

 

[Gretsch]

My carb fan works though, bc when the key was one and not running someone asked why it was blowing air.

So are you saying the fan runs only when you turn the key on and whenever you turn the key on, regardless if the engine was recently run or had been sitting overnight? If that's the case, the fan on yours runs, but I certainly wouldn't make the claim that it 'works'. That's not normal operation. Sounds like someone wired the fan direct to a key controlled hot. If that's the case I wouldn't worry about the black wire you were wondering about in your OP at this point.

In a factory setup the fan typically comes on when the key is off and after the engine has been up to operating temps. Like say you took a 10 mile trip on a warm day. If you parked the truck, and shut the engine off (key off) after said trip, the fan would come on and run to cool the carb until the temp sensor gets cool enough and kills ground to it shutting the fan off. If you were to say run the truck and park it (key/engine off), hear the fan come on, then turn the key back on, you would actually hear the fan turn off. If I am understanding you right, it sounds like yours works exactly opposite.

Are you wanting to get the fan to work like from the factory, or just wondering why its working at all?

 

[dannyvp]

I'll have to double check that. Earlier with a cold engine and the key on it did not work. After running while the engine was running the fan was on. I didn't check after I turned the key off.

 

[Spike Strip]

The two wires to the ICS will be GREEN and WHITE, as in your pics. The Green is SWITCHED 12V (or should be). The White is ground. From the look of things, I'd say your truck has been desmogged. If that's the case, the White wire should be attached to a ground point, like a carb screw (put a ring on it!) ... The Green should go to the ICS.

If you no longer not have that Exhaust Manifold Temp Sensor, the BLUE wire should be grounded to a fender bolt... Now, If things are functioning properly, each time you cycle the key On and Off, the Carb fan will run for 15 mins or so.

That Manifold sensor is no longer available, but there are aftermarket ambient air sensors available that you may be able to adapt.