Question about 1998 GMC Sonoma

2 Answers

The factory coolant temp sensor had 3 wires an a aftermarket on as 2 how do i hook it up.

Posted by on

Ad

2 Answers

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

    Sergeant:

    An expert that has over 500 points.

  • GMC Expert
  • 167 Answers

You don't. Either you have not pulled the correct sensor or your replacement sensor is wrong. Three wire sensors have a constant reference voltage, signal return and ground. 2 wire have no constant reference voltage.

Posted on Oct 14, 2013

  • _-__-___-_
    _-__-___-_ Oct 14, 2013

    but he never said which of the 3 was bad, ECT? but on this car its the wrong sensor for all. there are many 3wire sensor, the jon type and others, can prove that. and it dont matter, its the wrong sensor, send it back. this time tell them what engine. and year.

×

Ad
  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • GMC Master
  • 20,706 Answers

You bought the wrong sensor
there car 3 types used on many engines.
and there are many GM engine options, every year.
so did you buy it in a store, o r online,?

most online buyer need to know what they are ordering.
(yes, buying parts can be a horror,for anyone.)
that is because online is not indexed by VIN, (dolts)
Some stores, list 2 of 5 engines and stupidly assume there are just 2. this really ges my goat.... end rant.
in a real store they ask for VIN, on GM there is a RPO sticker
in the glove box.and has engine code right there. (a build list)
some times the VIN gets it right the engine code there,, but not always.

the 3 sender are. (circa 98) ECT, dash guage, and A/C over heat.
post the engine size,.vin # or rpo sticker photo.

when you see the 3 wire, that usually means the sensor covers
2 temp senders in one. and is wrong for you.
try using smp cat. 2.4l or 4.3L it shows.
i looked there and both engines are 2 pins. 1998
tell me brand of sensor and box pn, and ill tell you every engine it fits
or go to rockauto, and do same.

i looked and not one 3pin ,just 2 and the 1pin gauge sender
if you have different engine. than the 2 listed above. all bets off.

Posted on Oct 14, 2013

Ad

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of.(from cars to computers, handyman, and even drones)
click here to download the app (for users in the US for now) and get all the help you need.
Goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Engine temp gauge not reading and ac will not turn on due to engine hot warning, diognostics say its a sensor, need to know which one and can i do it myself?2003 saturn vue


What diognostics say its a sensor ?????? No diagnostic's ever tell's you it's a sensor . You as a technician would need to prove that by testing electrical circuits , viewing coolant temp sensor . Hooking scan tool and trying to command the gauge with by directional control . The temp gauge not showing any temp. ? No movement ? Engine Coolant Temperature Gage Inaccurate or InoperativeStep Action
Yes
No
Schematic Reference: Instrument Cluster Schematics
1
Did you perform the Instrument Cluster Diagnostic System Check?
Go to Step 2
Go to Diagnostic System Check - Instrument Cluster
2
Install a scan tool.
Turn the ignition ON, with the engine OFF.
With the scan tool, perform the Lamp and Gauge Check in the IPC Special Functions list.
Does the engine coolant temperature gage move up and down when commanded?
Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems
Go to Step 3
3
Replace the IPC. Refer to Instrument Cluster Replacement .
Did you complete the replacement?
Go to Step 4
--
4
Operate the system in order to verify the repair.
Did you correct the condition?
System OK
Go to Step 2
Would hate for you to replace the coolant temp sensor an find out that's not the problem ! Does the vehicle start an run good ,trans mission shift good ? If so it's not the coolant temp sensor .
Engine Coolant Temperature Gage
The ECM sends coolant temperature as determined by the coolant temperature sensor to the BCM via CAN serial data. The IPC displays the engine coolant temperature with the gage when the BCM sends a class 2 message to the IPC indicating coolant temperature percentage. The engine coolant temperature gage defaults to cold (0°) or below if:
• The ECM detects a malfunction in the engine coolant temperature sensor circuit.
• The IPC detects a loss of class 2 communications with the BCM.
• The BCM detects a loss of CAN communications with the ECM.

Aug 19, 2017 | AC Cars & Trucks

2 Answers

How many teperature sensor does geo tracker have


normally one
it is near the thermostat housing and has up to 4 wires attach to the plug
it is used to repot engine coolant temperature to the ECM so that air/fuel mixture can be adjusted and the fans switched on through a relay
don;t confuse it with a coolant temperature sender which has 1 wire and works the temp gauge

Oct 02, 2016 | 1996 Geo Tracker 2 Door

1 Answer

Location of the coolant temp sensor on 2001 honda passport


Usually threaded in thermostat housing...has a 2 sometimes 3 wire plug

Jul 04, 2016 | 2001 Honda Passport

1 Answer

93 Honda civic vtec auto, does the coolant temperature sensor have a wire that goes to the coolant temperature switch sensor? one comes from the ecm. I assume the other goes somewhere?


here is better help
http://forum.pgmfi.org/index.php

first off most cars, old, have 2 or three coolant sensor;.
1 for the dash gauge (dedicate) usually 1 pin sensor.
then
2: a two pin sensor, this is called (back then) CTS, coolant temp sensor, (this is the main ECU sensor ,if bad , ecu goes to horrid limphome mode. the ecu sends 5vdc to it and uses current flow
(measured) to read water temps, (and scale injections!)
3: an optional, A/C overheat sensor.

the drawings are all at
alldata.com any time you want too look

Oct 17, 2013 | Honda Civic Cars & Trucks

1 Answer

Won't start in Cold weather in Warm Weather it's fine


without actually hooking up a scan tool and looking at the pid data i would say you have either a coolant temp sensor issue or intake air temp sensor issue.i have seen alot more coolant temp sensors bad than the intake air temp sensors tho.

Feb 17, 2013 | 1996 Jeep Grand Cherokee

1 Answer

1992 Ford Tempo Coolant Fan


the "sensor " near the thermostat should have 2 ,3 or 4 wires to it
if it only has one wire , that is the temp gauge sender unit and not the coolant sensor the coolant temp sensor reports to the ecm and that unit then switches on the fan relay that spins the fan
if you unplug the coolant sensor and the fan starts to run you have a serious coolant temp sensor circuit problem
take it to an accredited service center and have it sorted

May 01, 2017 | Ford Cars & Trucks

1 Answer

Wireing diagram for 2003 trailblazer ext 4.2 coolent temp sensor


the coolant temp sender only has 2 wires which can usually be hooked up either way

Nov 12, 2010 | 2003 Chevrolet Trailblazer Ext

2 Answers

Coolant sensor on a saturn, can you show location?


well there are 2 coolant sensors,,,one is the coolant level sensor which is internal to the coolant resivor,,but i think you are talking about the infamous engine coolant temp sensor,,,,ok pop your hood you will see the cam cover that says saturn on it,,,,thats the top of the engine,,,ok,,,then on the lower right side of that you will see the upper radiator hose,,,and the EGR valve,,,,now inbetween the egr valve and upper rad hose is where the coolant temp sensor is,, its just below them,,there is a little wiring harness with a yellow and a black wire going to it,,,,it actually screws into the lower side of the cylinder head,,,,just squeze the wiring connector at the 2 thicker spots and pull it straight off then take the coolant cap off the resivor,,to relases pressure and put it back on,providing the car is not hot,,,,the sensor is actually a 13mm or 14mm socket that removes the sensor,,,,,they usually crack and leak into the harness so check the harness for corrosion,,,,be like green/blue on terminals,,if so youre gonna have to wire in a new connector,,,,no big deal ,, normal s-series issue,,,do not use aftermarket junk like autozone as these do not read correctly from the start youre gonna have to shell out the money at the saturn dealer for the good stuff ,,like $18 for the sensoe and $37 for the connector but it comes with the 2 **** connectors you need to wire it in,,,so if you remove the sensor just put the new one in snug but dont break it off,,,,top off coolant,,,,cut the 2 wires off the old connector as close to the end as possilbe. so you retain as much wire as you can,,,,,it doesnt matter which wire goes on what side but i lke to keep it the way it was the black wire on the right and the yellow on the left,,use the **** connectors,then heat shrink them and wrap them with electrical tape and youre done

Oct 25, 2009 | 1999 Saturn SL

2 Answers

Silverado Coolant not getting hot enough?


it has to be either a broken gauge, faulty wiring, or poor coolant flow (although in the summer i doubt the coolant is staying 'too cold' in reality).
First, we will check the temp sensor 1. Pull the temp sensor out and let it hang. 2. Boil water -- it will be at 212* at its boiling point but cooling rapidly, so speed is key. Or better yet, if you have a thermometer and vegetable oil and steady hands, heat that up to 250* 3. Take the water or oil to the sensor and pop the sensor in it. Watch the gauge to see if it reads accurately (should show around 200 if you moved quickly with the water, oil will still be ~240ish and will work better, but is more dangerous). If the gauge is off, then we've found the problem. For better measure, if you have a thermometer you can place that next to the temp sensor to compare results.
if the temp reading is too low (lower than what your thermometer reads), it is also possible that you have a short in the wiring or simply corroded wires connected to it, adding resistance to the wire which would result in a lower reading. (people sometimes use this to their advantage with the air temp sensor -- add a 100ohm or so resistor in-line with the sensor to trick the cpu into thinking the temp is colder, prompting it to adjust the air/gas mix and yielding a couple hp increase, although damaging to your system.)
the more i think about it, the more a faulty wiring feels like it could be the problem. if the temperature is reading accurately, i'd take a serious look at the flow of coolant through the system. if it isn't heating up then it must not be contacting enough heat. there may be blockage somewhere; crimped hose or maybe just mystery gunk.
hopefully this helps, if anything it's a start. most of the time it seems like solutions are found unexpectedly when testing completely different things. good luck!

Jul 14, 2009 | Chevrolet Silverado 1500 Cars & Trucks

1 Answer

98 Celica overheating problem


c7d7b55.jpg Cooling Thermostat.
Look along the radiator hose where it enters the engine. This controls the water temperature.


toyotacelicathermalfanswitch.jpgToyota Celica Thermal Fan Switch The Toyota Celica thermal radiator fan switch is usually located in the radiator or the engine block and has 2 or 3 wires coming from the unit. The 3 wire switch has a dual sensor for dual speed radiator fans. The Toyota Celica thermo fan switches come in the factory temperature settings and also come in cooler thermostatic settings so the fan will come on at a lower coolant temp.

The Toyota Celica cooling system is made of aluminum components and requires a Phosphate free coolant. DO NOT PUT an over the counter antifreeze in your Toyota Celica, as it will ruin the radiator and water pump.

Feb 19, 2009 | 1998 Toyota Celica

Not finding what you are looking for?
1998 GMC Sonoma Logo

99 people viewed this question

Ask a Question

Usually answered in minutes!

Top GMC Experts

yadayada
yadayada

Level 3 Expert

76846 Answers

Freddy

Level 3 Expert

1311 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22246 Answers

Are you a GMC Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...