Car tries to start in on position for a sec / cooling fan not working | Ford Escort Owners Association (FEOA)

Car tries to start in on position for a sec / cooling fan not working

Discussion in '2nd Gen 1991-1996 1.9L SOHC' started by XXXXXXXX, Dec 29, 2019.

  1. XXXXXXXX

    XXXXXXXX FEOA Member

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    Ok so for the short version.. I bought another escort wagon.. its been 8 years since my last one. I did a butt ton of reading here first before posting.

    First problem... cooling fan not working car gets hot in traffic. So...
    1) Tested cooling fan direct wire to battery. Works fine on high and low.
    2) Flushed heater core. Heater during flush did not appear to have been clogged and lots of water came out. Fan doesn't work.
    3) Replaced temp sensor 2 wire switch in that tube thing. Fan doesn't work.
    4) Replaced all 3 relays. 2 in fender well 1 in fuse box. Fan doesn't work.
    5) Replaced thermostat and housing. Fan doesn't work.
    6) Then read the fan should come on during Koeo off test. Fan did not come on. So...

    Did a ton more reading.. found a post where a guy had bunch of weird problems due to a bad ignition switch not getting power to his fan relay. Since this car already had a push button switch prior to me getting it.. i figured i would replace the ignition switch.

    7) Replaced ignition switch with a new one. The switch was definitely bad. Put the switch in and the car will start with the key now... got rid of button.

    New problem. So when turning the ignition switch..... the starter engages for a split sec when turning it on BEFORE i get to the start position. Then after its running for under a minute.. you can here the starter try to engage again for a split sec.
    Fan still doesn't come on during the Koeo off test. If I pull the cooling fan relay in the fuse box... the above starting problem goes away. Put cooling fan relay back in.. the starter trys to engage for a split sec prior getting to the start position in the switch.

    Any ideas?

    Thanks for the help.
    X
  2. zzyzzx

    zzyzzx FEOA Member

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    Either a bad ground, or the stupid push button start wiring strikes again!
  3. Valdres Rose

    Valdres Rose FEOA Member

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    It could be 2 or more wires touching where their insulation has rubbed off or shorted by arching, or a common connector where the connector leads are touching. I would try to find the common source where the fan lead, and starter lead, could physically be touching but insulated, like in a wiring harness or a connector. That's the main clue, where those 2 leads interact with each other somehow.
  4. XXXXXXXX

    XXXXXXXX FEOA Member

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    I haven't checked any grounds yet. As far as the push button goes.. i pulled it out. I also removed the wiring for the push button switch. However it was not wired into the column. It was nicely tapped into the fuse box and it went straight to the solinoid. The wiring under the column from the ignition switch is clean. The only thing tapped into the ign wiring was an aftermarket cruise control unit. I removed the cruise control wiring as well so all wiring under the column is clean.

    Thanks X
  5. XXXXXXXX

    XXXXXXXX FEOA Member

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    When i pull the fan relay in fuse block under the hood... the problem stops. Looking as a schematic.. it looks like one of the leads to the relay is always hot.. then the other show to go to the starter... the other 2 i dont know what they do.

    Thanks X
  6. Marvin

    Marvin FEOA Member

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    The cooling fan relay gets it ground from the starter motor. Suspect a bad starter solenoid for both cooling fan and starter problems. As already stated the wires already mentioned is for the relay coil. The small relay terminals, one is always powered up and hot with key on, the other is ground when not cranking or hot when cranking. This is to disable the fan when cranking. The larger terminals are the relay contact side. One is hot the other sends power to the cooling fans when the relay is energized.

    So with key on engine off that relay should always be energized. Unplug it and plug it in and you should feel it click but mostly it wont. (because it's missing ground from bad diode in starter) Remove the relay and jump the two larger terminals and perform koeo test. I am willing to bet the fans will engage during the test. It should go low speed then bump up to high speed for a short time during the test.

    In fact jumping that relay should cause the fan to run at low speed with key off since the low fan relay is a normal closed. Turning the key on the PCM will turn off the fan by energizing the low speed relay and would have normal operation....except it would run again after shutting car off.

    Most likely it has a bad diode in the starter/solenoid assembly causing the ground to be missing. This allows the minor current that travels through the cooling fan relay coil to energize the starter temporary. It also prevents the the cooling fan relay from engaging.
    Last edited: Dec 30, 2019
    zzyzzx likes this.

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