4.3 coolant temp switch & coolant temp sensor - S-10 Forum
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4.3 coolant temp switch & coolant temp sensor

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Old 06-22-2010, 03:59 PM   #1
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4.3 coolant temp switch & coolant temp sensor

i searched and did not find what i was looking for.i got a 88 4.3 s10 pick up which is which and what do they do.my gauge is not working and one person swears its the sensor and the other says its the switch.i know one is supposed to be for the computer and the other for gauge or maybe im wrong.somebody give me some info on what the two do where i dont buy the wrong part
Old 06-22-2010, 06:10 PM   #2
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Re: 4.3 coolant temp switch & coolant temp sensor

The sensor for the gauge is at the passenger side in top of the exhaust manifold.
A single green wire goes there.
Take off the wire and connect it to ground (ign. on). The gauge must move to max temp.
If it does the sensor is bad.
If not it could be the gauge, the wire or a bad ground somewhere by the cluster...
Old 06-22-2010, 10:23 PM   #3
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Re: 4.3 coolant temp switch & coolant temp sensor

dont you mean its in the cylinder head?
Old 06-23-2010, 05:29 AM   #4
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Re: 4.3 coolant temp switch & coolant temp sensor

Quote: Originally Posted by cstiles
dont you mean its in the cylinder head?
yes, that's what he means, between the plugs
Old 06-23-2010, 08:38 AM   #5
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Re: 4.3 coolant temp switch & coolant temp sensor

one other detail they are different sizes on my truck
Old 06-23-2010, 08:58 AM   #6
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Re: 4.3 coolant temp switch & coolant temp sensor

Quote: Originally Posted by phantom_mia
one other detail they are different sizes on my truck
Yep, the one between the plugs goes to gauge(single green wire) the one next to thermostat has a smaller plug but 2or 3 wires I think, it goes to ecm
Old 06-23-2010, 11:10 AM   #7
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Re: 4.3 coolant temp switch & coolant temp sensor

Quote: Originally Posted by cstiles
dont you mean its in the cylinder head?
Yes thats what i try to say, my english isn´t the best, but i want to help here too, because many of the users here in this forum helped me in the past, too
So thats the only thing i could give back
Old 06-23-2010, 12:10 PM   #8
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Re: 4.3 coolant temp switch & coolant temp sensor

ok thanks ima make sure the gauge is good when i get around to replacing it.gotta replace my serpentine belt,radiator hoses and a power steering line first fortunatley
Old 06-23-2010, 07:18 PM   #9
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Re: 4.3 coolant temp switch & coolant temp sensor

Quote: Originally Posted by cstiles
ok thanks ima make sure the gauge is good when i get around to replacing it.gotta replace my serpentine belt,radiator hoses and a power steering line first fortunatley
perfect time to change temp sensor since your changing hoses, it's only 14 bucks
Old 06-23-2010, 11:13 PM   #10
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Re: 4.3 coolant temp switch & coolant temp sensor

Quote: Originally Posted by eisterd
perfect time to change temp sensor since your changing hoses, it's only 14 bucks

i plan on changing it .i thank mine is bad anyways.
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