Testing an electric fan

[Chlorin8ed]

That is what I thought... Where the 3 wire connector connects to the fan is labeled. The Black wire is labeled "neg" with a fused line and the Brown/orange is labeled "pos" and is not hooked up to anything. The middle wire blue is not labeled but fused.

So the only 2 wires used are fused which confuses me. I guess I need to retry testing the fan to make sure it works then try to figure out the wiring

 

[83hurst-olds]

One concept that was hard for me to originally wrap my head around, is that you can effectively put the fuse on either side of a circuit and have it blow when it exceeds the rating. However, it is much easier to control the positive in a vehicle since most of the chassis is grounded anyway.

I'd just use a battery charger as mentioned above. That's how I test out trolling motors, etc.

 

[Chlorin8ed]

One concept that was hard for me to originally wrap my head around, is that you can effectively put the fuse on either side of a circuit and have it blow when it exceeds the rating. However, it is much easier to control the positive in a vehicle since most of the chassis is grounded anyway.

I'd just use a battery charger as mentioned above. That's how I test out trolling motors, etc.

Ok, I tested with a battery, how do you use a battery charger?

 

[Chlorin8ed]

Thanks 83hurst/olds!
The fan works and it is a two speed. The PO only had it hooked up to one speed and it was the slowest. So does anyone know if the fan runs speed 1 seperate from speed two or conjunction with each other? Also how do you hook it up to run both? I would like it to come on when it comes up to temp. and then high with the A/c kicks in and/or if it gets to hot? Is this possible or am I asking to much? 😳

 

[83hurst-olds]

It looks like you should be able to do that using the wiring diagram above. I can't think of any off the top of my head that requires both leads to be hot for the 2nd speed, although I also can't think of it actually hurting anything either. Your second speed would effectively tie into the lead on the AC compressor. I would use a relay though for ease and safety sakes.