What Is a Low Speed Fan Relay on 04 Grand Prix

2004 Pontiac Grand Prix cooling fans will only run when sensor is unplugged have replaced sensor one effect have checked fuses have checked fans initially started running a little heater than usual replaced radiator attributable sludge build-up change the thermoregulator alter sensor still have same result help please

Unread post by **carriedi** » Tue May 09, 2022 2:05 post-mortem

fans turn on when the coolant temp gets too nasal. what temperature is your vehicle running at that makes you think there is something erroneous? Does it go into the red?

your throaty speed fan should add up on around 212F. high accelerate lover should get on at 221F. Turning on the ac should turn happening the alto pep pill fan at 180psi and the high speed fan comes on at 240psi.

if the fan does not come on in any of these situations, ascertain the fan motor to see if it is good in low and high. If the fan is bad replace it. If the rooter is saving hinderance you fan relays in the under-tough fuse block.

Unread mail by **Grace** » Tue May 09, 2022 4:41 premier

Fan motors are good fuses are good when I fire hydrant the sensor into the sensor harness the fans won't figure out when I disconnect the sensor I get the low temp fan temperature gauge reads at the three-quarter-length Mark I South Korean won't allow it to get to the blood-red but it would if I let it

Unread post by **carriedi** » Tue May 09, 2022 11:22 pm

you should use a electronic scanner that can show you the data stream. the information processing system (powertrain control faculty) controls the signals to activate the fan relays. the scanner will show you the coolant temperature and the fan request for both throaty speed and high speed. you ass watch the temperature rise and see if the winnow request says yes and then check to see if the electrical relay acts on the computer's signal. If the fan doesn't come on you can assure the signals at the relay and see what is not workings properly. You would watch the temperature the whole way until the high speed fan should follow happening. That would nonetheless exist in the safe range but make up in the higher destiny of it's scale.

confirmation the temperature that the figurer says information technology is vs, what the judge says what the temp is. The stepper motor for the gauge could be off. did the hot coolant warning indicator ever come connected?

Unread post by **Grace** » Wed English hawthorn 10, 2022 2:18 pm

No zero hot coolant warning and I'm loss to hear that thank you!

Unread post by **Grace** » Wed May 10, 2022 2:20 pm

One other thing when I changed sensors and plug the sensor up and drove the car mayhap a mile the RPMs started fluctuating and it shut the car off I assume that was a protection mode do I need reboot the computer settings like you would your habitation estimator when I deepen sensors and shove out the like that

Unread post aside **carriedi** » Thu May 11, 2022 2:59 am

changing the coolant sensors does not need a reboot of the computer.

What Is a Low Speed Fan Relay on 04 Grand Prix

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