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1992 chevy 1500 coolant temperature switch

myheadhurts2 myheadhurts2
New User | Posts: 1 | Joined: 12/07
Posted: 12/05/07
02:49 PM

I would like to know what the difference is between the coolant temperature sensor which is on the intake manifold and the coolant temperature switch which is on the left head between plugs 1 and 3. What is the function of both and which one functions the temperature gauge.  

jgate-#002 jgate-#002
Guru | Posts: 953 | Joined: 06/07
Posted: 12/06/07
08:59 AM

The coolant temp sensor in the intake is for the ECM. The ECM monitors this switch so it knows if the engine is  hot or cold for proper fuel/air mixture. There should be a single terminal switch mounted in the head for the temp guage.  

Tami.P6 Tami.P6
New User | Posts: 28 | Joined: 01/13
Posted: 02/10/13
10:24 AM

Coolant temp sensor relays your coolant temperature to gauges. It tells the ECM what is coolant temperature and coolant temperature switch just simply turns on the fan.  
Mark’s Old Towne Service, Inc. has been providing high quality fleet maintenance since 1983. At our state of the art truck service center, located in the heart of Anaheim right off the 55/57/91 freeways

waynep71222 waynep71222
Guru | Posts: 823 | Joined: 03/12
Posted: 02/10/13
11:07 AM

nope... you have it wrong

ECT... engine coolant temp sensor is for the ECM only on cars up through 1998 or so..

coolant temp sender
is for the gauge...

radiator fan switch is for the radiator fan control

there are variations on this but this is the way it works on many cars...

all current cars use the engine coolant temp sensor signal to the ECM to calculate fuel needs. but also to control the dash gauge and also control the cooling fan relay.  

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