Can you guys help me identify that cylindrical resistor looking thing on this? The part is a blower motor resistor for a '97 Jeep Wrangler. I'm assuming that the coil elements are working and that the part I can't identify is what's acting up.

 

It's a temperature fuse
From the picture I can see is 121°C. ( it ain't clear).
That is the fuse threshold. Fuse opens if temp goes beyond that and needs to be replaced.
Mind you. Soldering is not an option unless you got experience. I can solder those without destroying them. I dunno any other who can.
You need to crimp a new one

 

It's a temperature fuse
From the picture I can see is 121°C. ( it ain't clear).
That is the fuse threshold. Fuse opens if temp goes beyond that and needs to be replaced.
Mind you. Soldering is not an option unless you got experience. I can solder those without destroying them. I dunno any other who can.
You need to crimp a new one

You can solder them if you heatsink the lead on the fuse side of the solder joint, gripping the lead tightly in a pair of pliers and doing the soldering very quick usually works

 

Not if you don't have experience.

 

Not if you don't have experience.

of what, trying always to have the last word

 

Experience in soldering on to components that are sensitive to heat.
Whether you clamp a plier or not on to that fuse, if you take your time trying to solder wire to that, it will open. Period.
Been there, Done that.

of what, trying always to have the last word

I dunno what ur problem is but I hold onto what I said.

 

It's a Thermal Fuse.....looks like its crimped into the connector.

 

Experience in soldering on to components that are sensitive to heat.
Whether you clamp a plier or not on to that fuse, if you take your time trying to solder wire to that, it will open. Period.
Been there, Done that.


I dunno what ur problem is but I hold onto what I said.

I think you missed where he said 'very quick'

 

I think you missed where he said 'very quick'

And you missed the part where I said "if you take your time trying to solder wire to that".

 

You do not need to solder the thermal fuse to the ends. You can twist the ends of the fuse to the locations where the former element was connected and use some thin strip of steel to secure one wire to the other. I have used three methods, and these are, twisting tight one wire around the other; spot-welding (not soldering), a fantastic method if you have a spot welder at hand; crimping the wires together with a piece of a blade connector, like this part:

All of these methods are applicable. The resistor packs continue to work for many years. But spot welding is the best option, so if you have someone who works on battery cell replacement and has a spot welder at hand, it's the best option in my opinion