Question about 2000 Pontiac Grand Am GT

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Ground wire issue for the the heater relay

Only letting the fan run on the highest setting

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  • Pontiac Master
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Your problems seems to be the heater resistor it is a common GM problems located near blower motor.

Posted on Mar 24, 2014

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2 Answers

Heater fan runs on high all the time unless key switch is turned to off position.


Even with the mode switch in off position? The mode switch is tied into the circuit for the heater speed control switch.

Other than that, I don't know. Are you sure you replaced the right relay, the blower motor relay?

Oct 14, 2015 | 2001 Jeep Cherokee

1 Answer

What color is the hot wire on heater fan control


Assuming you have manual heater controls...

The hot wire is pink with white. this is power from the blower relay. this is a ground side controlled system meaning that the speed switch controls the path to ground for the blower motor.

If the switch is bad or you see power on both wires at the blower motor with the connector plugged in than there is a ground issue.

if you ground the orange with black wire and the blower still does not work than the blower is bad.

Aug 15, 2015 | 1997 Ford Taurus

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98 Honda civic cx over heating when stopped in traffic - I went thru cooling system, replaced hoses, thermostat, fan, radiator cap. After that stated to overheat on freeway after about 40 miles. pulled...


Unplug the fan on sensor. It should have one green wire and one black wire. Use a paper clip and jump the two wires. Turn the key to the run position, the engine does not need to be running. Does the fan come on? If not check the green wire for 12 volts and the black wire for ground. If there is no ground than run a new ground wire. If the is no power check the heater/air conditioning fuse in the under dash fuse block. If there is power and ground make sure both the cooling fan fuses are good and both the cooling fan relays are good.

Sep 05, 2013 | 1998 Honda Civic

2 Answers

Why does my fan keep running in my 2003 Volvo S 60 after the car is off?


It can be faulty fan relay.The relay is not turning the system off.Or its wire short issue.Even with ignition off ,the fan relay is getting power so its not letting the fan to turn off.Bypass the fan control relay and see if still the fan works with ignition off or not.

For more troubleshooting check the link below:------

Cooling Fan Stays ON with Ignition Off?

http://whatisbyme.blogspot.in/2012/07/cooling-fan-stays-on-with-ignition-off.html
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Cooling fan relays location ?

http://technoanswers.blogspot.in/2012/02/cooling-fan-relays-location-on-1998.html
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DIC says "COOLING FAN FAULT"?

http://schematicsdiagram.blogspot.com/2011/12/dic-says-cooling-fan-fault.html
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Heater fan and headlights will not turn off with ignition off?


http://technoanswers.blogspot.com/2012/01/heater-fan-and-headlights-will-not-turn.html


-----------

Fuel pump relay and cooling fan relay troubleshooting ?

http://repairhelpcenter.blogspot.com/2011/10/fuel-pump-relay-and-cooling-fan-relay.html

-------------

Where Is Radiator Fan relay and Fuse Located?

http://schematicsdiagram.blogspot.com/2011/12/where-is-radiator-fan-relay-and-fuse.html

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These will help.
Thanks.

Nov 28, 2012 | Volvo S60 Cars & Trucks

1 Answer

The cabin blower not working.


Not sure what vehicle you have, I wont beable to give you specifics. Using a jumper wire, unplug heater motor and applie 12v jumper wire and ground if 2 plug connector. If the fan does not come on, replace the fan motor. If not, you will have to investigate wiring.
Next, remove a/c relay and see if the a/c pump stops. If it stops you have a bad relay or you have a control wire grounded.

Nov 25, 2011 | Ford Taurus Cars & Trucks

2 Answers

My 03 galant has an electrical issue. My heater and air conditioner work just fine but the fans stopped working. What could be my problem


if the fan still works on highest setting only the fan speed resistor block is faulty.
if the fan doesnt work on highest setting check for power at fan while on highest setting with globe test light, as well as checking fuse for fan. 2 wires one power other is earth. if power is there the fan motor needs replacing so long as the earth wire is also ok check with voltmeter on Ohms for continuity should be a couple of Ohms any higher is no good.

Sep 02, 2011 | 2003 Mitsubishi Galant

2 Answers

My heat has stop blowing. replaced blower, and heater on off switch. what else could it be?


LX? DX? EX? Hatchback? sedan? wagon?coupe? engine size? did you check the fuse? Fuse #19, 30 amps in the auxilary fuse box (your owners manual may show the location ,it may be near the blower ?). The Blue/White wire at the heater blower motor should be HOT (12v) with key on. If you ground the Blue/Black wire the motor should run full speed.

Dec 17, 2010 | 1991 Honda Civic

4 Answers

Heater on my envoy only works on 3-4 setting, could that be the switch.


Thanks for the opportunity to let me help. The blower control switch in your vehicle also uses a blower relay. This relay is generally located on the firewall on the passenger side near the heater fan. You can also look in you vehicle owners manual for the location of the blower relay, it may be also be located in the fuse and relay box under the hood. Generally speaking if the highest setting doesn't work on a GM vehicle it is a high blower Relay. This item is not expensive and can be purchased at most all you local Auto parts stores. If you have a Napa, Orielly's, or AutoZone these stores will also likely help you in the location if you are unable to locate this relay. Here is a general picturepepsiman1967.jpg The installation of this relay is either to remove from the fuse box, or if located near the heater fan housing then you will need to remove the mounting screws, remove the wiring clip, then reverse to install. I hope that this has helped you. D.R. Wilkins

Nov 05, 2010 | 2004 GMC Envoy

1 Answer

Heater fan short.....Fan quits working. Relay or something loose?


check the heater motor hot lead as well as the ground wire on the heater motor they have common ground fault issues that result in bad / weak connections also check the fam motor speed control resistor located under the hood in the AC/heater box

Jan 24, 2010 | 1997 Buick Riviera

1 Answer

My saturn over heats only when i have the ac off


Check for a fuse that is blown first.Then look for a cooling fan relay.Check the relay to see if it will turn on the fan,by using a test light.Clip the end on the test light to a good ground,maybe the ground on the battery.While the car is running,pull the fan relay out just a little so you can touch the prongs on the relay with the test light pointed end.When you touch the right prong,the fan will come on.The test light is actually grounding the relay.This is the safe way to activate the relay without damaging the relay circuit.If the relay clicks,and the fan comes on,replace the coolant sensor.If the fan does not come on,and the relay clicks,then run a hot wire to the positive wire on the fan to see if it will work.If you don`t get the fan to run that way,and you are sure the fan is hooked up correctly,then replace the cooling fan.If you cannot get the relay to click,and the fan is good(because you have checked it)replace the relay.If I can help,let me know.

Aug 30, 2009 | 1995 Saturn Sl

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