Heater help... (1 Viewer)

Joined
May 2, 2016
Messages
375
Location
Arkansas
I guess I need some help figuring out what’s going on with my heater. Flipping the heat selector, I can hear an audible click from the fuse area but nothing happens at any fan speed. Blower doesn’t kick at all which is why I though it may be the blower motor. Pulled the motor and direct wired to a 12v supply it runs fine. Could it be the resistor? I’m a novice at wiring diagrams and struggle to wrap my brain around them.

D8D3B239-3A90-47DD-8414-D39E1DA5EADF.png
 

Ming89FJ62

Pig farmer extraordinaire
GOLD Star
Joined
Jul 31, 2002
Messages
1,632
Location
Palatine, IL
Did you check voltage at the plug for the blower motor? Also the fuse? Start at the fuse, then the plug and work backwards from there
 

gregnash

Anal Retentive Analyst
SILVER Star
Joined
Nov 3, 2011
Messages
12,132
Location
Carson City, NV
So maybe having a little bit of voltage drop? Should it be receiving 12v at that plug (I am assuming yes).
Go back to the fuse and check the voltage at the fuse to see what is passing.
 

OSS

Joined
Jun 30, 2017
Messages
3,171
Location
Oblivion
Im not sure I understand what you're saying when you said," flipping the heat selector".

The FJ60 has a water valve actuated by the slider lever on the air control panel. Blue to red. Sliding it any direction won't turn on the fan. You've got to flip the fan slider switch also to one of four settings manually to get air.
But I probably misunderstood what you posted.
 
Joined
May 2, 2016
Messages
375
Location
Arkansas
Would the resistor cause dysfunction (inoperability) at all fan speeds?

CB operating fine and wasn’t tripped.
 
Joined
May 2, 2016
Messages
375
Location
Arkansas
Sorry @OSS , I meant fan speed selector does nothing. Just hear a small click at the fuse box as well as another from the ac amplifier which I pulled.
 
Joined
Feb 9, 2018
Messages
97
Location
Portland, Oregon, USA
I highly doubt that the problem is the resistor if all fan speeds do not work. The hi speed circuit does not go through the resistor at all. It does sound like you have a voltage drop somewhere in the wiring. I would first do what gregnash suggested and check what voltage you get at the fuse.
 

OSS

Joined
Jun 30, 2017
Messages
3,171
Location
Oblivion
As panda mentioned, it's often the circuit breaker that flipped. The CB is the fuse for the fan. The CB is that small silver can in the fuse panel. Right side. Poke a paper clip inside the central hole to reset the breaker.
 
Joined
May 2, 2016
Messages
375
Location
Arkansas
CB doesn’t seem tripped. Tried wiring up to the fuse but only getting like 4v so I doubt I’m doing it correctly. Placing wire to each socket where CB fits.
 
Joined
May 2, 2016
Messages
375
Location
Arkansas
What does the amplifier do??

I’m not sure it plays any role in the heater. I think it determines the rpm when the ac compressor kicks on. Could totally be wrong because I have zero knowledge of the ac system since mine doesn’t work and is an untouched aspect of my truck
 
Joined
May 2, 2016
Messages
375
Location
Arkansas
Regardless. Thanks for the help so far. Ordered another CB just bc it was cheap. Will read some more and then try to get back to it Wednesday.
 

Users who are viewing this thread

Top Bottom