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Electric Fan Confuzzlement

347 Views 9 Replies 5 Participants Last post by  93celicaconv
Hey everyone:)
I have a 1991 Corolla with 4AF carburettor engine. I have a problem where the fan doesn't turn on unless the fan switch (which is located near the thermostat) is unplugged. I thought that the problem was the fan switch, but today I was working on something unrelated and bumped a wire (pictured) next to the battery and the fan randomly started up. On looking closer, the box that the wires go into (pictured) is quite corroded making a dodgy connection. Clearly there is a problem here. Does anyone know what this thing is or how I could fix it (it looks like the insides of it are beyond repair)?
I am highly confused as to what this thing does.
Thanks in advance.
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· Official PITA
'05 Solara Convertible & '07 ES350
1,513 Posts
I don't know if repairs without a schematic are impossible, I seem to remember solving a couple of electrical problems using a test light, a multimeter, and logic.
OTOH, a schematic can make things quicker and easier.
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