This fuse blows!... and so does HF!

[dazza]

Originally Posted by 71meangreenc10

I put this one in from jump street, I thought about the fan surging a while back and I have a big fuse that provides power to the temp controller and it works perfectly. I also have a pusher fan for the AC and it is wired to the controller so when it kicks on, it tells the puller fan (jeep) to come on. System works great in my opinion. I can send you some pics this evening if you like.

Mine has been in for over five years with no problems.

Smitty

Yea, I'd like to see how your's is setup. Sounds like mine, although with no controller I had them setup so both would come on at temp sensor limit and the pusher was also connected to trinary at a/c. I was sold the pusher with the a/c unit but really not sure if it will block more air than do good.

[71meangreenc10]

Here is the exact kit I bought.

http://www.summitracing.com/parts/flx-31165

Smitty

[71meangreenc10]

Here is the controller mounted. It has LED's on the left to tell you what is working.

Smitty

[special-K]

Originally Posted by dazza

haha... I'm with you for the most part, they usually have the one thing that makes part of a project soooo much easier, although you'll have to buy a new one for the next project. Made to break kind of thing. But, if it's my truck I have to buy for the next project because of something they sold me, there would be no going easy on them. Just wanted to let people know of the possibility and I think they need to at least have some sort of QC before these type of things go out the door.

Harbor Freight sells Snap Off tools Maybe they should stick with cheap tools and leave things like auto fuses to a company serious with quality control. What good is a fuse that doesn't blow while the wiring heats up?

[dazza]

Well the circuit break seems to do its thing but is at the point that it needs to cool down for 10 mins before resetting. I'm close to just throwing the mechanical back on for now but I'm wondering why I don't just follow Derale's instructions, which would be to remove the circuit breaker or fuse (the one that's blowing) between the battery and the relay. There is a fuse between the relay and the fan. Am I missing something?

Derale instructions

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[cleszkie]

Originally Posted by special-K

Harbor Freight sells Snap Off tools Maybe they should stick with cheap tools and leave things like auto fuses to a company serious with quality control. What good is a fuse that doesn't blow while the wiring heats up?

Agree 100%.

[dazza]

Originally Posted by lowbucktrucks

Don't use 40a fuse unless the wire is 8AWG. If the wire is 10 gauge use no more than 30a.
Fuse is always sized to wire or wire becomes fuse. This is how you start an electrical fire.
Also, the second 30a fuse between terminal 87 and fan is not needed, the first fuse protects the entire circuit.

Looks as if I had an HF fuse in that second 30A... I found it melted today. Can't spend on a controller at this point so I've ordered another temp sensor and I have a 60A relay, so I'm going:

Battery>8awg>40A Circuit Breaker(if obtainable locally)>Relay
Relay>8awg>Fan
Relay>8awg>Ground
Relay>10awg>Sensor

[dazza]

I just might get the village idiot award, MIGHT I said! I'm in the middle of rewiring the lot with heavier gauge wire, bigger circuit breaker, bigger relay, etc. and was doing some reading on a forum where somebody was wiring up one of the Taurus fans and I stopped when I read, "the blue is our ground wire and the black is power wire." I know it's from a F*^d and my fan is from a Jeep, but let's just say they are color coded the same.... does anybody know if you can reverse the polarity on the Cherokee fan?? Mine definitely pulls with the blue wire connected as hot and the black as ground.

71meangreenc10, how do you have yours connected?

[dazza]

update... charges dropped - appears I'm not an idiot for mixing up the wires. Apparently you can reverse the polarity just by swapping the wires with no ill effect (well at least for the few seconds I tried!).

So I updated to bigger wire, a new temp sensor, a 40A relay, and a 40A circuit breaker.

Running great now, keeping the temps lower than before as well.

Thanks for all your input!