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Temperature switches usually provide ground to the device they run at the temperatures required. For instance, a temperature switch used to run an electric cooling fan will provide ground when the coolant level reaches a specified temp. If your cooling fan temp switch has three leads to it, it is designed to run the motor faster at a higher temperature. To test it unplug it and use an ohm meter to test between the power lead and the other lead(s) on the switch. It should have infinite ( closed circuit ) when cold. Plug it back in and let the engine idle until its warm; the fan should start up. If not, turn off the motor unplug the switch again and test the leads. They should show continuity. If you are testing a thermo time switch ( for a cold start injector ) with the engine cold have a friend start the motor while you use a volt meter ( preferrably with back tester attachments ) to the leads to the switch. When first started ( engine cold ) the volt meter should read voltage for a specified amount of time ( normally 7 or 8 seconds ) then shut off. If started with the engine warmed up it should show no voltage.
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How can you tell if your fuel pump shut-off switch is bad?
You can tell if your fuel pump shutoff switch is bad, if the fuel pump does not shut off when you flip the switch. You can also tell if the switch is bad by looking at the wire connections.
Is Arkansas going to have a bad winter?
Since I live in Arkansas, I will say that we really can't tell how the winter will be. I could be dry and cold, or there could be another ice storm for all we know. All I can say for sure is that it's going to be cold, but I can't tell you how bad it will be.
Why would the air conditioning blow but not get cold on a 1993 Oldsmobile Cutlass Ciera?
Low freon, bad compressor, bad clutch, bad pressure switch (could be multiple of these), bad switch...the list goes on. Best bet is to take it to a mechanic for a diagnosis.
Freon leaking through the high pressure switch why?
Switch could be bad or the schraeder valvee the switch screws into could be bad
What could cause the ac to not blow cold air in a 98 sunfire?
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Have brake light but no tail light?
It could be a bad bulb, it could be bad wiring, it could be a bad switch.
Your heater blows cold in your Lincoln?
COULD BE A BAD HEATER CORE COULD BE A BAD HEATER CORE sounds like the heater control switch needs replacing.if that doesnt fix it, you need new heater core
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1. Bad pressure switch. 2. Bad pressure switch pigtail. 3. The system is low on freon.
Is there a way to tell if the power window switch is bad or if it the motor for the switch?
remove switch from where it is mounted using a wire , bridge the connections.if switch is bad, it will work the motor while bridged
What is wrong when car runs and then will not crank?
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What could make a Starter in a 1992 Nasson 4-cylinder truck quits working?
If the truck is manual. There are a couple of place to check. A bad ignition switch, bad clutch interlock switch or a bad starter relay. If it is an automatic. The selector switch could be bad.
Why does the light switch not work to an existing electrical outlet?
Could be a loose connection somewhere, or a bad switch, or a bad outlet.
