Car didn't make it...?

[SedanSandwich]

That wire/fuse terminals must have a ton of resistance to be melting like that...

[blackhawkimpact]

How are you guys wiring the electric fan? I been reading the threads but still kinda confused.

[DaveSmed]

That kind of damage the second time is probably caused by arcing. You see it frequently in old circuits with big inductive loads like fans.

Are you still running the original fan, and do both speeds still work?

[Oldemar Gutierrez]

never seen a fuse do that..

That actually happen to me but for another fuse :S

[GaryE30]

Your overheating problem was likely air in the system. Do you use the correct proportion of water and coolant? If you have too much water it will boil and produce air. Air is definitely not the best fluid for heat exchange.

As for the blowing fuses, make sure that the fuse is properly seated and mating with the leads inside the fuse box or you will definitely get an arc if its just "close".

[blackhawkimpact]

That kind of damage the second time is probably caused by arcing. You see it frequently in old circuits with big inductive loads like fans.

Are you still running the original fan, and do both speeds still work?

Running the original aux fan and the e-fan.

Your overheating problem was likely air in the system. Do you use the correct proportion of water and coolant? If you have too much water it will boil and produce air. Air is definitely not the best fluid for heat exchange.

As for the blowing fuses, make sure that the fuse is properly seated and mating with the leads inside the fuse box or you will definitely get an arc if its just "close".

Car is not overheating or anything. Temp only raises when I'm stalling, that's when I turn on the fan.
I'm only using water and water wetter because I bypassed the heater core and I'm waiting to replace it and don't want to spend extra on Coolant.
Fuses are seated properly.

[DaveSmed]

How do you currently have everything wired? Is the new fan spliced into the aux fan's low speed wiring?

[blackhawkimpact]

The e-fan is wired into the aux fan harness, the one by the left headlights.

[DaveSmed]

So both fans come on when the low speed relay is triggered?

That was asking a lot out of that circuit......

[blackhawkimpact]

Yes

So how do I connect it so that both fans turn on but won't blow my fuse?

[DaveSmed]

Well, fuse 3 and the normal speed relay are now unusable. You still have a working high speed relay so you can use that, but you are going to need some parts, namely an inline fuse holder, a relay or two, and some connectors.

Assuming you are using the stock switch, how do you want the fans configured? New fan + aux fan (low) at the first setpoint, and have the aux jump to high on the second? New fan only at first, and then aux fan on high? Some other combo?

[blackhawkimpact]

^What would you recommend? Fuse #3 looks like it still works. I removed the blown fuse. I want it to turn on when the temp goes past 1/2. This "New fan + aux fan (low) at the first setpoint, and have the aux jump to high on the second" sounds like the way to go, no?

[DaveSmed]

Judging by the pic above of the underside of fuse 3 (where it attaches to the circuit board) I'm not so sure how reliable it's going to be. Maybe it's the pic though, does it look ok? Running new stuff is a lot cheaper than replacing a warped head...


How quickly did the car cool off with the current setup? If it seemed to cool down very fast, I might suggest (based on the size of your new fan of course) running that at the first setpoint alone. Reason is, if its big enough, it can probably cool the car down in traffic quieter and with less amp draw than the noisy ancient monster out front. Does your A/C work?

If there's any doubt about that though, you know your existing setup worked so go with that.

Are you familiar with de-pinning connector terminals by any chance?

[GaryE30]

Running the original aux fan and the e-fan.



Car is not overheating or anything. Temp only raises when I'm stalling, that's when I turn on the fan.
I'm only using water and water wetter because I bypassed the heater core and I'm waiting to replace it and don't want to spend extra on Coolant.
Fuses are seated properly.

If you bypassed the heater core then you shouldn't be leaking coolant there. In your initial post you said the car was overheating... its because you're not using coolant. But thats an easy fix compared to your electical issue... I cannot help you there.

[blackhawkimpact]

I never said i was leaking coolant. I'm not leaking anything. When I said I was "overheating" meant the temp gauge raises past from where it should.