Question about 1997 Cadillac DeVille
My fans will not come on I have already changed the thermostat.I ran a wire from my battery to check the fan its ok . I bought the sensor but don't know where it go.
with the a/c on, the fan should be on. crank it up, turn a/c on, now take a hammer and gently tap on the coolant fan, if it comes on, or attempt to spin, its bad.
Posted on Oct 19, 2009
yes some coolant sensors do, others just monitor the coolant temp,, the fan switch should be mounted on the radiator, " a plug with 2 electrical terminals on it " and can be tested by bridging the contacts with a pin and the fan should run if not the switch is at fault..
Posted on Nov 07, 2009
Testimonial: "Thanks for the help"
SOURCE: my temp gauge goes to
CHECK COOLANT FAN FUSES AND RELAYS. CHECK COOLANT LEVEL.MAKE SURE ITS NOT TOO LOW BECAUSE IF COOLANT TOO LOW . BY NO COOLANT AROUND OR COOLANT SENSOR NOT SUBMERGED IN COOLANT COOLING FANS WONT TURN ON.MAKE SURE YOU HAVE 50/50 ANTIFREEZE AND WATER. CHECK FOR CLAPSE RADIATOR HOSES.CHECK RADIATOR HOSE AT WATER PUMP.IF HOSE LOOK CLAPSE REPLACE IT AND BLEED COOLANT SYSTEM.IF EVERY THING HAS BEEN DONE YOU NEED ENGINE BLOCK FLUSHED OUT.HEATER CORE ALSO COULD BE STOPPED UP.A VERY HIGH MILEAGE ENGINE WILL OVER HEAT.OLD ENGINE LOSES COMPRESSION AND HORSE POWER.PUTTING MORE LOAD ON THE OLD ENGINE WILL MAKE IT OVER HEAT.IF COOLANT LEVEL IS LOW.BLEED COOLANT SYSTEM.START THE ENGINE LET IT IDLE FEW MINUTES WATCH THE COOLANT TEMPERATURE GAUGE.WHEN TEMPERATURE START RISING.TURN OFF THE ENGINE LET IT SET FOR 20 MINUTES.TAKE A LARGE RAG PLACE OVER RADIATOR CAP ON COOLANT EXPANSION TANK SLOWLY OPEN RADIATOR CAP JUST A LITTLE TO RELEASE A LITTLE PRESSURE AT A TIME.DONT OPEN CAP RAPIDLY OR YOU WILL GET SCALDED.ONCE THE RADIATOR CAP REMOVED.IF COOLANT LOW ADD MORE COOLANT IN THE THE COOLANT EXPANSION UNTIL YOU GET TO THE COLD MARK.REPEAT THIS PROCEDURE START ENGINE LET IT RUN UNTIL TEMP GAUGE START CLIMBING A BIT DONT LET CAR RUN TO OVER HEAT JUST IDLE UNTIL TEMP JUST START TO RISE.THEN YOU TURN OFF ENGINE. WAIT 20 MINUTES.THEN USE LARGE RAG OPEN RADIATOR CAP LITTLE AT A TIME. DO THIS PROCEDURE UNTIL THE COOLANT IN THE EXPANSION TANK STOP DROPPING. THEN ALL THE AIR IS BLEED OUT THE COOLANT.WHEN COOLANT LEVEL STOP DROPPING, WHEN YOU DRIVE CAR AROUND.AND TURN OFF ENGINE.WHEN ENGINE OFF CAR SET FOR A WHILE KEEP CHECK ON THE COOLANT LEVEL IN COOLANT EXPANSION TANK. THE COOLANT LEVEL SHOULD BE AT THE COLD MARK IN THE EXPANSION TANK.MAKE SURE COOLANT IS IN THE EXPANSION TANK.IF NOT AIR WILL DRAW IN COOLANT SYSTEM. CAUSING ENGINE TO OVER HEAT.IF BLEEDING AIR OUT THE COOLANT SYSTEM DONT HELP AND COOLANT FANS DONT TURN ON YOU HAVE PCM PROBLEMS.
Posted on Apr 22, 2011
SOURCE: temp gauge elevates to high
Hi, first I have to ask if you have made any modifications to the engine. If not, have you verified that you have good flow thru the radiator? If not, open the cap, start the engine, let it warm up, and watch for flow. If flow is not good, you may need a water pump. Also look to see if the radiator is clogged up.
If the flow is good, you may have a small leak in the head gasket.
To check for a head gasket leak, park on an incline, remove the radiator cap, set theheater on high, start the car and let it warm up until there is flow in theradiator. Fill the radiator and keep it full while the engine continuesto run. Look for any bleed ports the system may have either in the hosesor at the attach point housings. Crack any bleeders open to allow any airout. Top off the radiator all the way to the neck and make sure there areno bubbles coming up. Bubbles coming out the radiator are an indicationof a blown head gasket.
Please let me know if you have any questions,and thanks for using FixYa.
Posted on May 07, 2011
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Posted on Jan 02, 2017
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