Rad Fan no longer coming on 1993 LX 1.9 | Ford Escort Owners Association (FEOA)

Rad Fan no longer coming on 1993 LX 1.9

Discussion in '2nd Gen 1991-1996 1.9L SOHC' started by Not THAT kind of 'escort', Nov 6, 2016.

  1. Not THAT kind of 'escort'

    Not THAT kind of 'escort' FEOA Donator

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    Is there a good flow chart of what to check, maybe with actual volts, ohms, etc and good clear pics of which pins, etc?

    I couldn't remove the big black fan plug in the under hood fusebox. Appears to be hanging tough do to long white plastic retainer leg. I guess I'll just bust that sucker off?


    I'll probably just end up doing another one of my standard by-pass and manual toggle switch through the firewall, but I thought I'd at least TRY doing it right.
    denisond3 likes this.
  2. denisond3

    denisond3 Moderator Staff Member

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    The wiring for the radiator fan is laid out in the Electrical and Vacuum Troubleshooting Manual (EVTM). I have gotten each of mine from ebay. You need to have the one for the same year as your Escort is. While the fan circuitry didnt cnange over the years, the rest of the electricals did. And the way the fan relays are wired up, is confusing; at least it was to me.

    The large black box in the “fuse box” under the hood and near to the battery is the relay that supplies 12 volts to the two fan relays hidden in the fender behind the air filter housing. When the ignition is first turned on, the fan should run very briefly. It will stop running as soon as the PCM finishes its power on self test, and energizes one relay to cause the fan to stop; because the engine is cold.


    So if the fan doesnt come on for maybe less than a second each time the ignition is first turned on, then it could be that black box relay is bad, or that the contacts of the connector under it are melted, or that the fan fuse in that fuse box is blown, or that the fan motor brushes are worn out, or that the two fan relays are stuck in the “fan off” position.

    You can try pulling the connector apart on the fan or on the harness going to the fan, and check out the fan by connecting 12 volts to it. There should be one black wire, which is the ground wire. The other two wires are for the windings to the low speed motor or to the high speed motor.

    I just went outside to see if I could remove the fan relay that is in the underhood fuse box of my 94LX – but I couldnt. (Its dark and I had to hold the worklight with one hand).

    Somewhere I have a fuse box I got from a pick-n-pull, with the wires hanging out of it and tomorrow in the daylight I will look for it. Its possible I could get the relay out if I knew how to manipulate the white plastic retainer leg. It is also possible the relay is just stuck in place because the connector under it has melted onto the pins of the relay. It doesnt look like it would be easy to know which wire under that fuse/relay box to check, but with the EVTM you would at least know what the color code of the wires would be.

    When I had a problem with the fan not coming on consistently:
    I made up a 12 volt 30 amp generic relay with wires attached. It has a wire connected to the positive terminal of the battery (via a 30 amp inline fuse), and another wire running into the connector for the radiator fan motor. One of the wires to energize the relay coil is grounded. The other 'control' wire (to energize the relay) comes into the interior, and is soldered inside a 12 volt plug. I can put this plug into the cigarette lighter, and the relay will turn on the fan. If I forget to unplug this, the fan motor will stop when I shut the engine off; since the cigarette lighter isnt powered when the ignition is off. This way I dont have high current being demanded from the cigarette lighter.

    With any luck, in about 20 hours I will know how to get the relay out of the fuse/relay box under the hood.
  3. Not THAT kind of 'escort'

    Not THAT kind of 'escort' FEOA Donator

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    WOOPS, I gotta a 1992 1.9l wagon 5spd.

    Just ordered the manual you suggested on Ebay.

    Will it tell me what numbers I should be seeing from a voltmeter, etc?


    yeah, melted plugs under the big black fuse. IIRC when I had similar prob with my departed 1995 and searched the junkyards most all had serious heat damage in that same area. Other random models of cars looked factory fresh and clean.

    What about the sensor that checks the water temp?
  4. LariRudi

    LariRudi FEOA Donator

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    When ya try to pull that main/fan relay in the fuse box, ya gotta MEAN IT.... it does come out, just be aware of what your hands are gonna hit when it suddenly releases.

    Good luck,

    LarryR
  5. denisond3

    denisond3 Moderator Staff Member

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    Right. It has 3 anti-release grips to it, or is it four? Still, it does come out.
  6. FordMan59

    FordMan59 FEOA Member

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    Welcome back Larry, been awhile since I saw any posts by you.

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