Question about 1990 Oldsmobile Cutlass Supreme Conv

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Car runs fine , then dies. Turned on gauge underneath heater/ac controls and viewed a sudden voltage loss, only does this when hot. what would cause this ?

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  • Terry Prigotzke Aug 01, 2013

    to charles j smyth jr My car shuts down after 2 hours of driving at normal operating temp. Regards Terry Prigotzke

  • Terry Prigotzke Aug 01, 2013

    Joshua Davis Altenator good checked it first. Terry Prigotzke

  • Terry Prigotzke Aug 01, 2013

    Short in wiring/ blower motor To bratt802



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Posted on Jan 02, 2017

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SOURCE: lights come on car dies then starts back up when turn key

bad altenater

Posted on Nov 11, 2008

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SOURCE: i changed the thermostat on my 01 olds alero but it still overheats. i have a small leak from the coolant expansion tank but not a big enough one to drain the whole tank. it seems like the tank overfl

try checking your water pump the fluid just my be sitting there n not circulating or is poorly flowing n also check your heater core it might be clogged might need replaced

Posted on Apr 22, 2013

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2011 Crown Victoria Police Interceptor overheating problem: I observed that the temperature gauge indicator reached the highest point and the warning light lights up while driving with the AC switch is...

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Sounds like the 3800 motor has overheated...? You could seriously damage your motor if you run it hot for to long...Does your inside gauge show "Hot"...could just be a stuck thermostat, but demands being replaced before damaging further...Did you confirm coolant overflow/radiator are full to proper level? Low water can cause this, and serious damage. Hope this helps.

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It sounds like the over heating problem might be a blown head gasket dose the motor oil have water in it or water have oil in it .and the ac sounds like the clutch on the ac unit is bad i had the same car and it did the same thing and the belt on the ac did not brake the motor just dies

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Control panel

Year make and model ? I doubt the heater ac control would affect the engine temp gauge.

Jul 04, 2013 | Cars & Trucks

1 Answer

I turned on the ac and the light does not work, the vents are not blowing and the car is running hot. I have a saturn SL 1996

First check the 15 amp HVAC fuse located in the main fuse block inside the car on the passenger side of the center console, under a cover. If the fuse is good, then the problem may either be the HVAC blower switch (which is the fan blower selector switch), the fan blower motor resistor, or the fan blower motor. An auto repair manual will explain and illustrate for you the steps on how to check each of these components.

Even after pushing the ac light switch on, the fan blower selector switch has to be turned on as well (working) because it provides an electrical path to the positive side of the battery to complete the circuit and turn the ac light on. What the ac light switch does is provide the electrical path for the ac compressor clutch to come on through the ac control relay which is controlled by the car's PCM(computer) when you want ac, but the ac light switch still needs to run through the fan blower selector switch to receive its power. You can turn on the fan without the ac light switch because it gets its ground path(negative) from the blower motor. So the blower motor has to work in order to provide a ground path for the fan blower selector switch to be functional. You could have a faulty blower motor which is why no air blows through the vents. The fan blower motor is located inside the car on the passenger side underneath the dash at the bottom end of the glove compartment box. You'll see it. It's right above where a person rests their feet on the floor. Therefore, if your 15 amp HVAC fuse is good, check to see if you have voltage at the blower motor connector. Unclip the connector and with the ignition on and the fan blower switch moved to any one of the first 3 selections, check for voltage using a multimeter. The voltage will vary because there is a blower motor resistor. Voltage should be higher on setting 3 than 1. If you do have voltage at the blower motor connector, check for a faulty blower motor. The auto repair manual will tell you how to do it using jumper wires.

It's normal that your car is running hot because the radiator fan works in conjunction with your ac compressor. If the ac is on, the radiator fan will be on and therefore the engine coolant temperature will stay in it's normal operating range. If the ac is off, the radiator fan will stay off as well and the engine coolant temperature gauge will begin to rise and show pretty hot (especially at idle). It will do this up until a certain degree then the radiator fan should turn on thermostatically and stabilize the temperature. It's scary and I know what your saying because it does that to my car if my ac isn't on. Don't worry it won't overheat.

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1 Answer

Car smells like it is running hot but gauge doesn't show its running hot. I don't see anything leaking from underneath and have checked fluids. Had to have the thermostate replaced a couple of years ago...

This could be due to a leaky heater core. The heater core corrodes and starts with a tiny collant leak that smells collant inside the car and washes out with the A/C water when the A/C is running. This water/coolant mix drips out possibly over the right side exhaust pipe creating the "hot coolant" smell outside. At the begining you won't notice the coolant been lost, but later the loss will be ovious.

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Car dies when heater turned on

Assuming your charging system is working properly-You probably have an idle speed control problem. Behind the battery there is an over voltage relay with red top and a 10 amp fuse in it. This relay powers the a.b.s. and the idle speed control unit. Make sure fuse is o,k, and that the relay is not corroded. Next there is 2 micro switches on the throttle linkage(you will have to remove the air cleaner. This switches are tested with an ohm meter and show continuity in one position and open in the other(don't worry if the ohm reading is high).Next to the over voltage relay there is 2 black relays(one fuel pump the other is climate comtrol) The one that says klima is the climate control. Make sure it is not corroded and a lot of times the electrical connector gets bowed and you will lose contact. This relay is really more of a control unit and gives input to the idle and c.i.s. control units as far as the a/c and heater operation. Hopefully I have been helpful

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1 Answer

1991 Mazda 626 DX dies suddenly after running for 10 minutes.

Hello, It sounds like an engine ignition control module gone out or a coil. They get hot and quit working after a short period of time, cool off then work again till they get hot.
Is the ignition system pointless electronic or does it have points? Are you getting any fire at all now to the cylinders? Does the tach in the vehicle show any RPM's during cranking? Do you have voltage at the positive side of the ignition coil? Does the coil meet the ohm ratings for that years vehicle ignition? Does the vehicle have oil in it so the oil pressure sensor allows the engine to run, this may not be an option on your particular vehicle? You can check most of this out with a volt/ohm meter. Check your voltages before starting the vehicle, during running and after it quits to see where the loss is. Just don't get near the center tap of the coil or you will get a rude awakening and/or serious injury. Good luck, RAC

Apr 05, 2009 | 2000 Mazda 626

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