Question about 1996 Oldsmobile Ninety Eight Regency

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COOLING FANS IN OP ENGINE OVERHEATS

HAVE CHECKED FUSES-OK SWAPPED RELAYS NO HELP. DUAL FANS-BOTH INOP. COOLANT LEVEL OK WILL MAINTAIN NORMAL ENGINE TEMP AT RD SPEED-BOILS AT IDLE OVER 4 MINUTES INSIDE GARAGE. .

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Check your temp sensor. It is either located on the bottom of the rad or on the block some where. It should be a two wire sensor...not a one wire(for gauge) Sometimes when the sensor is faulty the ecu will not get a signal to turn on the fans. Also try running a straight power and ground to the fans to make sure they actually work. ( Just un plug fans and use a jumper wire to the tangs of the connector)

Posted on Apr 15, 2009

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2000 cadillac deville is overheating, replaced thermostat: water pump radiator had head gaskets fixed it's saying check coolant level and it spews coolant from the overflow tank cap when hot thoughts?


Two cooling fans controlled by three relay's . If only one fan is working ,that could be a problem .
Coolant Level Sensor Description
The coolant level sensor monitors the coolant level in the cooling system and indicates if the coolant is low. This sensor is located at the base of the radiator surge tank and is not serviceable.
CHECK COOLANT LEVEL (2)
The IPC receives a discrete input from the engine coolant level switch. The engine coolant level switch is normally closed. When the engine coolant is low, the engine coolant level switch opens. When the IPC receives an open signal from the engine coolant level switch, the IPC displays the message on the DIC.

Relay Driven Dual Cooling Fan Diagnostics There are using a pontiac , by your cadillac is the same .

Mar 24, 2017 | 2000 Cadillac DeVille

1 Answer

1999 Cadillac Eldorado ,overheating changed thermostat , overflow cap ,no white smoke coming from exhaust.hot blowing from heater


Are the cooling fans coming on ? Go under the hood in the engine compartment , with the vehicle running have some one turn on the A/C , do you see and or hear the cooling fans come on ? Could be the coolant temperature gauge is bad ! How many miles on the vehicle ? Ever have water pump replaced ?

1

Check for a loss of system pressure.
Is there a loss of system pressure?
--
Go to Step 2 yes
Go to Step 3 no

2

Inspect and repair any faulty hose connections.
Does the engine still overheat?
--
Go to Step 3 yes
System OK

3

Check for low coolant protection (-37?°C/-34?°F).
Is there low coolant protection (-37?°C/-34?°F)?
--
Go to Step 4 yes
Go to Step 5 no

4

Test solution. Replace the coolant if necessary.
Does the engine still overheat?
--
Go to Step 5 yes
System OK

5

Check the water pump belt for low tension.
Is the water pump belt tension too low?
--
Go to Step 6 yes
Go to Step 7 no

6

Replace the water pump belt tensioner.
Does the engine still overheat?
--
Go to Step 7 yes
System OK

7

Check for an inoperative thermostat bypass.
Is the thermostat bypass inoperative?
--
Go to Step 8 yes
Go to Step 9 no

8

Replace the bypass.
Does the engine still overheat?
--
Go to Step 9 yes
System OK

9

Check the water pump.
Is the water pump inoperative?
--
Go to Step 10 yes
Go to Step 11 no

10

Replace the water pump.
Does the engine still overheat?
--
Go to Step 11 yes
System OK

11

Check the radiator fins for obstruction.
Are the radiator fins obstructed?
--
Go to Step 12 yes
Go to Step 13 no

12

Inspect and clean the radiator fans.
Does the engine still overheat?
--
Go to Step 13 yes
System OK

13

Check the cooling system passage for obstruction.
Is the cooling system passage blocked?
--
Go to Step 14 yes
Go to Step 15 no

14

Inspect and flush the system. Reroute or replace the hose if necessary.
Does the engine still overheat?
--
Go to Step 15 yes
System OK

15

Check the water pump belt for damage.
Is the water pump belt damaged?
--
Go to Step 16 yes
Go to Step 17 no

16

Replace the water pump belt.
Does the engine still overheat?
--
Go to step 17 yes
System OK

17

Check the cooling fans.
Are the cooling fans inoperative?
--
Go to Step 18 yes
Go to Step 19 no

18

  1. Inspect the electrical connector. Replace if necessary.
  2. Does the engine still overheat?
--
Go to Step 19 yes
System OK

19

Check the throttle body circuit flow.
Is the throttle body circuit flow restricted?
--
Go to Step 20
Go to Step 21

20

  1. Inspect the orifice and associated hose. Replace if necessary.
  2. Does the engine still overheat?
--
Go to Step 21
System OK

21

Check for a stuck thermostat.
Is the thermostat stuck in the closed position?
--
Go to Step 22
--

22

Replace the thermostat.
Does the engine still overheat?
--
--
System OK

Sep 16, 2015 | 1999 Cadillac Eldorado

2 Answers

What cause of overheat from engine


an engine will overheat if the rad cooling fan is not working, this will have to be check to see if its the fan motor, the fan relay. low coolant level, top up coolant check for leaks. could be head gasket problem, bad water pump(impeller worn).

Aug 08, 2014 | Daihatsu Charade Cars & Trucks

1 Answer

Why won't my cooling fan turn on (swapped thermostat, thermoswitch, fan really)(fans work when hard wired to battery). Causes car to overheat in idle.


depending on the year, there should be 3 relays that control the fans.
There's a rad fan relay (4 pins), an a/c condensor fan relay (4 pins), and a fan control relay (5 pins). This allows them to be run at low speed or high speed. Check the grounds behind/under the righthand headlamp.
Check Fuses 57, 58 (30 Amps) and fuse 46 (15A) under the hood, and fuse 3 (7.5 Amps) in the driver's underdash fusebox.

May 18, 2014 | Honda Pilot Cars & Trucks

2 Answers

2002 ford windstar sel overheating


first check coolant level in radiator coolant level sound low.if coolant overflow jug empty.coolant sysyem low, when add coolant to coolant overflow jug coolant level should stay at full cold mark.if coolant level okay,engine overheat while sitting or moving in slow traffic either coolant fan relay or fuse could be bad.or engine coolant temperature sensor could be bad. coolant sensor turn on cooling fan at certain temperature.hot wire check to make sure cooling fan motor not bad or short in wires.if all is good have pcm check it controls fan relay to through the coolant temperature sensor signal when coolant get hot.

Nov 04, 2012 | 2002 Ford Windstar

1 Answer

My 2005 equinox cooling fans come on for a few seconds &shut off making engine over heat &OVERHEATING What is the problem?


Should be a relay somewhere in the engine compartment - may be failing. You may be able to switch with another relay to diagnose.
Check your owners manual under fuses and relays.

Jun 23, 2012 | 2005 Chevrolet Equinox

5 Answers

Car will overheat while at idle


yes the head gaskets leaking on modern aluminum head engines is all to common. never overheat them, if they start to get hot shut it down and find out why, it can of course be the fans and plugged radiators or faulty thermostats but sounds like in your case the head gasket is leaking and combustion gas is entering the cooling system and this causes an overheat

Jun 08, 2010 | 2002 Mitsubishi Galant

2 Answers

I have a 94 olds cutlass cierra and the fans dont work


Check fuses, relays, the hook fan straight to batt power with jumper if fan is inop replace. If it works find your wiring problem.

Sep 21, 2009 | 1994 Oldsmobile Cutlass Ciera

1 Answer

Cooling fan runs constantly. Car overheats.


check engine temp sensor if ok check fan relay

Jul 07, 2009 | 1998 Cadillac Eldorado

1 Answer

When idling saturn ls 4dr sedan wants to overheat


Sounds like either you are low on coolant or the cooling fan isn't working. With engine cool remove radiator cap and check coolant level, top off if necessary. If full start engine and turn on A/C full blast, full cold the cooling fan should come on almost instantly, unless there are two individual cooling fans in which case only one may turn on. If no fans turn on check all fuses whether related to fan or not. If all fuses fine try swapping relays around, they are usually all the same size/style. If fan still doen't work you have either an open positve or ground side of the circuit, Which will require wiring schematics and a multimeter. If coolant full and fan/s turn on and engine still overheats you'll need a new thermostat installed.

Mar 24, 2009 | 2000 Saturn Ls 4dr Sedan

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