Temp Gauge/Fan not working

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Cadillac Catera and Cimarron Forum Discussion, Temp Gauge/Fan not working in Past Cadillac Vehicle Discussion; I just got done doing my oil cooler. Everything went well with 1 exception. My water temp gauge and electric ...
  1. #1
    AwfulSmokey is offline Cadillac Owners Fanatic
    Automobile(s): 99 Catera
    Join Date
    May 2006
    Ft Myers, Florida

    Temp Gauge/Fan not working

    I just got done doing my oil cooler. Everything went well with 1 exception. My water temp gauge and electric fan aren't working. I imagine both are due to a wire not being plugged in. Everything seems to be where it should be. I see one wire that isn't plugged in with a tag on it, that says test wire. Is this the culprit?
    If not could someone tell me what isn't/should be plugged in?

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  3. #2
    MARK Lowery is offline Cadillac Owners Member
    Automobile(s): 1998 CATERA
    Join Date
    Mar 2010

    Re: Temp Gauge/Fan not working

    I think you have the answer concerning the gauge in the post started by Rethro (sp?) but the fans are controlled by the two senders on the drivers side of the radiator. What I found on my daughter's car (98) is that two 30 amp fuses were blown inside the main fuse/relay enclosure. Check all these. Also, review the trouble shooting procedure in the manual. Turn out that the one connector w/ the pins facing up that doesn't have anything plugged into it is the Coolant Fan Test Connector. You can check the main fan low and high speed operation by bridging contact #1 and #4 (respectively) to ground. In the case of contact #4, the ignition must be on, but for the low speed (#1) you just bridge the contact. Turns out my problem was only the blown fuses, not a defective motor or sender. Car now runs at about the 1/2 way point, and the fan stays on at low speed after shutting the ignition off as it should under most circumstances. Good luck! I would now like to know why these fuse were blown, but runs fine for the time being.

    Mark Lowery

  4. #3
    catera00's Avatar
    catera00 is offline Cadillac Owners Fanatic
    Automobile(s): 2000 Catera Sport
    Join Date
    Feb 2007
    Tucson, Az

    Re: Temp Gauge/Fan not working

    So what was the fix?

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