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Originally Posted by Powerefx
Aright guys i have a cooling fan problem on my 93 escort wagon. At first i thought it didnt work at all, then is put power straight from the battery to the fan and then the fan started working. When i turn on my a/c the fan also starts working. However the fan doesn't work when the engine gets hot like it is supposed to. I was wondering what can be the cause fo this. I need alll possiblities available. Do you guys noe where all the relays are at, the onlones ive been able to find is the one in the fusebox. Could the relays be the problem?
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I do not have a 93 wiring diagram...so my response will be from general knowledge.
Your narrative eliminates several things:
1. The fan/s work.
2. The cooling fan relay is working since the fan/s come on when you activate the A/C. (Both circuits use the same circuit)
The fans should come on when the temperature reaches approx. 207F. Are you sure the engine coolant temperature is up near the top of the gauges normal range? If you aren't sure, run the engine at approx. 2000 while sitting still until it reaches the upper 7/8 of the gauge normal range. If engine temperature reaches that level and the fans do not come on....we will move on to the next trouble shooting step. NOTE: In this cold weather, the engine cooling fans don't run very often.
The signal to the EEC or the Fan Temp. switch is initiated by the CTS (cooling temperature sensor near the thermostat housing) to turn the fans on. I would check the CTS connection first. If you have a DVOM or a VOM I can walk you through a simple test procedure if you want to troubleshoot it yourself.