Question about 1987 Plymouth Reliant

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88 Reliant, non AC car, blower motor high speed only. Where is the resistor block?

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SHOULD BE ON THE BLOWER HOUSING IF NOT UNDER THE DASH IN THE BLOWER HOUSING.FOLLOW BLOWER MOTOR WIRES THEY ARE CONNECTED TO RESISTOR.IT HAS 2 SCREWS HOLDING IT IN PLACE.

Posted on Oct 16, 2010

  • JOHN LAPIER Oct 16, 2010

    YES HOTCHEVY1965 IS WRIGHT BLOWER MOTOR HOUSING CHECK CONECTIONS MOST TIMES THIS WILL SOLVE FAN CONTROL PROBLEMS

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IN SIDE BLOWER MOTOR HOSEING YOU GET AT IT FROM UNUER THE HOOD ITS A BUT CONECTION PLAY WITH THE CONECTER AND IT SHOULD WORK

Posted on Oct 16, 2010

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1 Answer

What is an AC diode fuse? I have a 2006 AWD Pontiac Torrent the AC/Heat doesn't work, I've changed all fuses for the HAVAC and still no AC/Heat blowing out of vents. What could be the problem?


Could be a number of thing's ! Testing the electrical circuit is the way to find out what's wrong . Using a wiring diagram and a DVOM - digital volt ohm meter . Videos on youtube showing how to test it ! Without testing i would only be guessing . Does it work in high speed ? In high speed it by-passes the resistor . If it doesn't work in any speed more then likely the blower motor is the problem !
Air Speed
The HVAC control assembly applies ground to the blower motor control circuit that corresponds to the selected blower speed. The resistors and the blower motor are in a series circuit. The following list represents the number of resistors in series with the blower motor per particular speed request:
• Low speed--3 resistors
• Medium 1 speed--2 resistors
• Medium 2 speed--1 resistor
When the operator requests High speed, the HVAC control assembly applies ground directly to the blower motor through the high blower motor control circuit. The resistor card has a fusible link which, if blown, will require that the card be replaced.

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My 1999 f250 blower motor only works on high


You probably need a blower motor resistor , it work's through a relay for high speed an resistors lower the speed for low , medium etc... Videos on youtube on how to test ! How to Install Replace Heater AC Fan Speed Resistor 99 07 Ford F250 F350...

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2003 jETTA Fan only works high speed. For AC compressor runs but no fan other than when switched to high speed at which time the fan runs at high speed but AC switches off.


a resistor went bad for your blower motor.It is located by the blower motor on a circuit board.You can get the replacement resistor at Radio Shack and solder it in.This fixed my problem

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I have only high speed on my ac/heat switch. have replace acdelco blower motor resistor 2 times already. works for a while and quits. whatelse do I need to check etc?.


If you have replaced the blower motor resistor block twice all ready, i would be replacing the blower motor itself. When the blower motor is drawing too much current it burns out resistors for lower fan speeds in resistor block, but doesnt blow fuse for fan. Also check for leaves and stuff in fan when removing fan.

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1 Answer

Blower motor only works on high


The blower motor only working on the high speed setting is caused by a failed part called the AC blower motor resistor, this resistor is located next to the blower motor and one engine goes into the air duct work of the AC/Heater and the other has a large electrical connector going to it.

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01 grand.prix ac fan switch only works on high. has a duel temp controller when you turn fan off the only way fan comes back on is to move the temp controller levers


Hi!!
When the Blower Motor Resistor (controls blower speeds) goes bad, the blower motor works only on HIGH SPEED. REPLACE IT.
BLOWER MOTOR RESISTOR Removal & Installation
  • Disconnect negative battery cable.
  • Remove right lower instrument panel insulator panel.
  • Disconnect blower resistor connector located behind right side of dash.
  • Remove blower resistor screws and blower resistor.
To install, reverse removal procedure
Good Luck!! A HELPFUL - 4 THUMBS - rating for this solution would be greatly appreciated. Thank you for using FixYa!!

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1 Answer

2005 Jeep Grand Cherokee. Htr/AC fan switch only functions @ highest speed. At lower speed settings I can hear doors opening and closing---but not air.


replace the blower motor resistor. It controls the fan speeds. It defaults to high speed only when it fails.

How to replace the blower motor resistor block: Caution: Stay clear of the blower motor and resistor block (Hot). Do not operate the blower motor with the resistor block removed. 1. Disconnect and isolate the battery negative cable.
2. Remove the glove box from the instrument panel.
3. Pull out the lock on the blower motor resistor wire harness connector to unlock the connector latch.
4. Depress the latch on the blower motor resistor wire harness connector and disconnect the connector from the resistor.
5. Remove the two screws that secure the blower motor resistor block to the HVAC housing.
6. Remove the resistor block from the HVAC housing. Installation:
1. Position the blower motor resistor block into the HVAC housing.
2. Install the two screws that secure the resistor block to the HVAC housing. Tighten the screws to 2.2 Nm (20 in. lbs.)
3. Connect the wire harness connector to the resistor block.
4. Push in the lock on the blower motor resistor wire harness connecgtor to lock the connector latch.
5. Install the glove box.
6. Reconnect the battery negative cable.
7. Have a nice day!

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1998 olds delta 88 lost fan control, ac control, and rear window control all at once have power to fuses and tried differnt switch assembly in dash


It might not be a fuse that goes to that it might be a relay thats under your hood in the fuse box. Just a idea for you to try. Hope this works out for you.

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1 Answer

My ac only blows on high


Blower motor resistors or speed selector switch.
There are no resistors for high speed its straight B+ to the blower motor. You know the motor is good. So the onky two items left are resistors and switch.

Apr 29, 2010 | 1999 Buick Century

1 Answer

AC only work on high speed


If the blower motor only works on the high speed it most likely needs to the blower motor resistors replaced. Sometimes when replacing the resistors the dealer recommends that the blower motor be replaced in conjunction. It's believed the blower motor burns out the resistors. The resistor pack is either in the engine bay mounted on the heater box or under the passenger side of the dash board.

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