Overheating and HI/LO Cooling Fans Not coming on - Focus Fanatics
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Old 09-06-2012, 09:05 PM   #1
ZX2003
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Overheating and HI/LO Cooling Fans Not coming on

So my '03 zx3 started overheating recently while at stand stills, or constant stop and go traffic as in the city. Neither of my cooling fans come on. I've been reading all about the various cooling system problems related to the fan that the Foci have, but mine seems to be a combination of it all.

First thing I checked was the cooling fan resistor since I read that was the most common problem. So i took it out, and turns out the connector was blown out. I spliced in a new connector and resistor and thought that would solve it. Nope.

So then i started checking everything else. Ppl pointed to the 30a low cooling fan fuse, it was good, but no power going to it. Looked at wiring diagram found out that before that fuse there is the 50a fuse. It was blown. So replaced that. Still not working. I tested the relay, it's fine too.

Now its basically down to the cooling fan motors. I really don't want to replaces the entire thing, but i might have to. I'm just hoping someone has some insight on somethign else that could be causing the problem. I dont want to keep throwing money/and parts at this thing.

Thanks!


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Old 09-06-2012, 11:12 PM   #2
duc450
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Have you tried running a 12v source directly to the fan to see if it will come on? Also if you spin them by hand are they making any strange noises?
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Old 09-10-2012, 12:35 AM   #3
elsolo
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I would check to see if the fan relays are getting a "on" signal, if the power input side to the relay is hot, and bench test the relays.
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