Where is the negative sensor or caprice - 1995 Chevrolet Caprice Classic

sensor may be bad or wire or guage, never trust sensors, they leak.rust and come loose, the guage may be loose in the cluster, more likely the sensor is getting air around it, it cann or work out of waterm hense make sure your water levevl is good and clean,Matt

library sec629 has mechanics books on each model

Engine Temperature Sensor Operation:This sensor monitors the temperature of the engine and sends that information to the engine control computer to regulate the amount of fuel needed - more if engine is cold and less if it's hot. The signal generated can also be sent to the temperature gauge as a visual indicator of overheating and imminent danger

I checked with autozone.com and their site says that the engine temperature sensor is not used on both engine sizes available for this vehicle.

The Coolant Temperature Sensor is used though. So maybe it has a dual purpose on your vehicle.

Coolant Temperature Sensor Operation:This sensor monitors the temperature of the engine and sends that information to the engine control computer to regulate the amount of fuel needed. More fuel is needed if the engine is cold; less if it's hot. If the temperature is extreme, the signal will be sent to the temperature gauge as a visual indicator of overheating and imminent danger.

Because ECT (engine coolant temperature) sensor procedures vary depending upon their location, first locate the part. You may need to partially drain the engine coolant to prevent coolant spillage.

• Disconnect the negative battery cable.
• Unplug the ECT.
• Then, unscrew it.
• Reverse the removal procedures to install the new part.
• Connect the negative battery cable to the battery.

The signal path is that coolant sensor tells ECU that the engine is 'hot'. Voltage at the relay for the fans switches on main voltage via a fuse to the fans. Check the fans first; run a wire from the live battery terminal to the fans' positive connection. If the fans do not operate check the negative wires from the fans for continuity and quality of connections. If fans do run then check the fuse and the fan relay. The fan relay might be interchangeable with one of the other relays (main lights?) so temporarily swap it over and see if that has any effect.

On a vehicle this age, it is likely that the fans themselves have worn out. Test the fans by running battery power directly to the positive contact. If they start, they are OK. On 4.3 motors, there is also a seperate temp sensor to signal the fans, usually called a fan switch. I believe it operates independent of the ECM. Another possible culprit is a bad ground at the fans or even a loose or corroded negative battery cable.

By Doing this >>"i touched the negative and positive on the battery" You Most likely Burned the "FUSABLE LINK" for the Main Acc Power, Check the Fuse LINK on the Firewall, Chances are it is BLOWN.
Replace this Link and you will have Power to Nessesary Components to START The Vehicle.

1993 Chevrolet Caprice Car Audio Wiring Diagram
Car Radio Battery Constant 12v+ Wire: Orange
Car Radio Accessory Switched 12v+ Wire: Yellow
Car Radio Ground Wire: Black
Car Radio Illumination Wire: Gray
Car Stereo Dimmer Wire: Brown
Car Stereo Antenna Trigger Wire: Pink
Car Stereo Amp Trigger Wire: Pink
Car Stereo Amplifier Location: N/A
Car Audio Front Speakers Size: 4′ x 6′
Car Audio Front Speakers Location: Doors
Left Front Speaker Positive Wire (+): Tan
Left Front Speaker Negative Wire (-): Gray
Right Front Speaker Positive Wire (+): Light Green
Right Front Speaker Negative Wire (-): Dark Green
Car Audio Rear Speakers Size: 6′ x 9′
Car Audio Rear Speakers Location: Rear Deck
Left Rear Speaker Positive Wire (+): Brown
Left Rear Speaker Negative Wire (-): Yellow
Right Rear Speaker Positive Wire (+): Dark Blue
Right Rear Speaker Negative Wire (-): Light Blue

pls rate

CHECK CABLES FROM COMPUTER HARNES TO MOTOR DOESN'T TOUCH EXHAUST MANIFOLD
CHECK GROUND CONTACT BETWEEN MODULE INSIDE DISTRIBUITOR AND NEGATIVE OF BATTERY

sounds like the fuel pressure resulator too me !!!

Check all car's sensors... the air-conditioning sensor has something to do with this