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Previous Thread Next Thread Print Thread Rate Thread Coolant temp light #752948 09/20/06 09:55 AM Joined: Sep 2006 Posts: 19 Calgary, AB marcilui OP Need a Spot Hey! after solving a major problem, I stil have one. From time to time(random), the coolant temp light come on for a couple of seconds than off... The water is not boiling, the expansion tang is on level..so..have I worry about, or can be just an electrical problem. Can be not enough coolant in radiator? Thx again. Re: Coolant temp light [Re: marcilui] #752949 09/20/06 02:29 PM Joined: Oct 2003 Posts: 7,768 Central Texas BigJim Web Wheeler Yes it can be not quite enough coolant in the system... HAVE YOU NOT LOOKED? Running it that low, if that is the problem, Is putting your head at risk for cracking and burning valves... If the light comes on, EVER, you must know WHY it came on!!! Big Jim <img src="/forums/images/graemlins/pfft.gif" alt="" /> professional bovine relocation specialist Re: Coolant temp light [Re: BigJim] #752950 09/21/06 10:03 AM Joined: Sep 2006 Posts: 19 Calgary, AB marcilui OP Need a Spot Jim, the coolant level is good in the tank, but I can not check inside the radiator.I try to replace the temp sensor. The light is on for just a couple of sec, than off, again on(random).If the coolant is the problem, the light sould be on permanent. Right? The coolant is not boiling, than in my opinion the sensor is bad. Re: Coolant temp light [Re: marcilui] #752951 09/21/06 02:39 PM Joined: Oct 2003 Posts: 7,768 Central Texas BigJim Web Wheeler We agree! Big JIm <img src="/forums/images/graemlins/pfft.gif" alt="" /> professional bovine relocation specialist Re: Coolant temp light [Re: BigJim] #752952 09/21/06 07:51 PM Joined: Sep 2006 Posts: 19 Calgary, AB marcilui OP Need a Spot I did another test...I unpluged the sensor and the light is stil coming ON...strange.. Re: Coolant temp light [Re: marcilui] #752953 09/21/06 08:04 PM Joined: Oct 2003 Posts: 7,768 Central Texas BigJim Web Wheeler Perhaps the signal from the sender turns the light OFF instead of vice versa? Big Jim <img src="/forums/images/graemlins/pfft.gif" alt="" /> professional bovine relocation specialist Re: Coolant temp light [Re: marcilui] #752954 09/21/06 08:57 PM Joined: Sep 2005 Posts: 1,087 Southeast Michigan BobRowe Body Damage is Cool If the light has a constant 12 volts on one side of it, and the sensor adds or removed a ground to the other side of the lamp to turn it on or off, the sensor is the most likely culprit. However, if the sensor is unplugged, that should give you a light that is constantly on or constantly off. If it randomly goes on and off, I'd really check out the wiring coming from the sensor. It's likely chaffed and shorting out intermittently. 1977 CJ-7, fiberglass body, AMC 360 w/ headers, DUI ignition, Edelbrock intake and Holley 4150 carb, TF999, Dana 300, 4.56 gears lockers, York air comp, 4" susp lift, 2" body lift, BFG 35" M-T tires, Megashifter, AGR pump & box, REP8000 winch. Moderated by  4x4Wire  Hop To Mitsubishi Forums ------  Mitsubishi 4x4 and SUV Tech  Mitsubishi Diesels  Mitsubishi ArchiveToyota Forums ------  Early Toyota Trucks  Toyota 4Runner, FJ Cruiser &...  T100 & Tundra Forum  Tacoma Forum  Toyota Tech ArchiveJeep Forums ------  Jeep Talk  Jeep TechIsuzu Forums ------  Isuzu 4x4 & SUV Talk  Isuzu 4x4 & SUV Tech  Isuzu DieselsKia Forums ------  Kia Talk  Kia Sportage & Sorento TechOff Topic Chat ------  4x4 Gallery  Off-Topic Chat  Recreational Access & Land ...  Politics4xForums ------  Outdoor Gear  General 4x4 Discussion  Tools and Fabrication  General Communications  Amateur Radio  GPS and MapsParts Bin ------  Private Party - Garage Sale  Private Party - Items wanted  Vendors, Hot Deals, Group Buys4x4Wire Back Yard ------  Suzuki Forum  AZ Crawler Crew  Cal-Nev Crew  General Ford 4x4 & SUV Forum  General Dodge 4x4 & SUV Forum  General Chevy 4x4 & SUV ForumFeedback & Testing ------  Problems, Questions, Suggestions4x4Wire Staff ------  Forum Moderators  Problem Threads Print Thread Switch to Threaded Mode 5 Excellent 4 Good 3 Average 2 Bad 1 Terrible View Profile Private Message Follow User Forum Posts View Profile Private Message Follow User Forum Posts View Profile Private Message Follow User Forum Posts View Profile Private Message Follow User Forum Posts View Profile Private Message Follow User Forum Posts View Profile Private Message Follow User Forum Posts View Profile Private Message Follow User Forum Posts

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