Question about 1993 Toyota Previa

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1993 Toyota Previa has heater problem. replaced resistor, relay, and a new blower motor. my rear heat doesn't work and neither does my air conditioner.

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Posted on Jan 02, 2017

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SOURCE: Blower motor has only low speed

You may need to get the correct resistor, as they are designed to only allow so much amperage to go through them. If it is getting very hot it is runnig to many amps through it. It will eventually blow and you will need to replace it anyway.

Posted on Jul 28, 2008

  • 11 Answers

SOURCE: I can't find the fuel pump relay in a 1993 Toyota

The fuel pump relay is always one of these two places, either under the steering colum to the left of the break pedal in the fuse/relay box or it would be under the hood of the car on the driver side also in a fuse/relay box.

Posted on Mar 27, 2009

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SOURCE: Replacing heater fan motor in a Toyota Previa

Removal & Installation It may be necessary to remove the upper radiator shroud to perform this procedure.

  1. Open and support the hood.
  2. Disconnect the negative battery cable and wait at least 90 seconds to proceed working on the vehicle.
  3. Disconnect the power steering and coolant reservoirs.
Disconnect the coolant reservoir

4. Disconnect the coolant reservoir and power steering brackets from the side of the heating unit box.

Remove the coolant reservoir bracket from the side of the heater unit

aa7a886.jpg Separate the power steering reservoir bracket from the side of the unit also

5. Remove the two bolts that attach the upper and lower portion of the heater box. 6. Disconnect the control cable on the side of the heater unit box.
Disconnect the control cable on the drivers side of the unit

7. Remove the eight nuts retaining the unit.

Remove the nuts (8) from around the heater unit

There are 4 nuts on each side of the unit

8. Disconnect the heater control valve bracket from the heater box.

9. Separate the top of the control box from the bottom.

Separate the upper case from the lower

Posted on Dec 02, 2009

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If your Previa's low/medium speeds on the blower (ac/heat fan) have stopped working, but the high speed works, you most likely have a problem with your blower motor resistor. Here's how to access the resistor. These directions may be slightly incorrect since I finished this procedure about an hour ago and I'm typing this from memory. But they should get the job done. It took me about 30-40 minutes to do this from start to finish:

Remove cabin air intake duct (two philips screws)
Remove one bolt holding antifreeze reservoir in place, move reservoir aside.
Remove two bolts holding brake fluid reservoir in place, move reservoir aside.
Unsnap recirculate/fresh selector cable from blower housing (on vehicle-left side of housing)
Remove angled metal arm from vehicle-right side of blower housing (attaches to firewall with nut and to housing with bolt).
Remove two bolts (at vehicle-front of housing) that hold the upper and lower blower housings together.
Remove nuts on firewall holding upper blower housing in place, and begin to work upper housing out of vehicle, disconnecting the 4 electrical connectors as needed (2 connectors are on top and 2 are down beneath the blower housing).
Remove nuts on firewall holding lower blower housing in place, and remove lower blower housing from vehicle

Look on the lower blower housing, on the side which was facing the firewall, and you'll see a white ceramic block (approx 2-3 inches long). This is the blower motor resistor. There are 2 contacts on the resistor that should be joined by a springy curved band. If the band isn't bridging the two contacts, it's likely that the soldier has melted/broken, and this is what's causing the low/med speeds to not work. Solder the band back in place and this should correct the problem (it did for me).

Posted on Jan 21, 2010

  • 1796 Answers

SOURCE: have a 1993 toyota pickup 4 cyl heater blower

To find out if your problem is the blower motor or the blower resistor or switch perform the following tests.

  • Remove resistor from vehicle or disconnect resistor wiring.
  • Using an ohmmeter, ensure continuity exists between blower resistor terminals No. 1 and 4. See Fig.
  • If continuity is not as specified, replace resistor.


Switch Position (1) Continuity Between Terminal No.
  1. OFF (1)
  2. LO 5 & 6
  3. (D) (2) 1, 5 & 6
  4. (D) (3) 2, 5 & 6
  5. HI 5, 6 & 8

(1) With switch in any position, continuity should exist between terminals No. 3 and 4 for heater control illumination. With switch in OFF position, continuity should not exist between any other terminals. (2) Circle (D) closest to LO position. (3) Circle (D) closest to HI position.

  • Remove heater relay.
  • Using an ohmmeter, ensure continuity exists between heater relay terminals No. 1 and 3, and between terminals No. 2 and 4.
  • Ensure continuity does not exist between terminals No. 4 and 5. If continuity is not as specified, replace relay.
  • Ground terminal No. 3, and apply battery voltage to terminal No. 1. Ensure continuity exists between terminals No. 4 and 5.
  • If continuity is not as specified, replace relay.
  • Disconnect blower motor wiring harness connector.
  • Apply battery voltage to motor side of connector. Motor should operate smoothly.
  • If motor operation is not smooth, replace motor.

  1. Disconnect negative battery cable.
  2. Remove glove box, if necessary.
  3. Disconnect blower motor and resistor connectors.
  4. Remove 3 screws and blower motor.
  5. To install, reverse removal procedure. See Fig.


Heater Relay is located on the Relay Block, Front Right Side Of Engine Compartment
Good luck!! A HELPFUL - 4 THUMBS - rating for this solution would be greatly appreciated. Thank you for using FixYa.

Posted on Nov 23, 2010

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How do i replace the heater core 1997 isuzu hombre

See me at website for images can only send one through this channel.

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Master Tech Lee

Heater Box Heat Shield
Remove or Disconnect
1. Fasteners that retain heat shield to heater box assembly.
Image [ Heater Box Heat Shield
Install or Connect
1.Fasteners that retain heat shield to heater box assembly.
-Bolts Screws to 2.2 N.m (25 lb in).
Image ' Heater Hoses
Image ' A/C Evaporator Tube Assembly
Image ' Evaporator Core
Image ' Evaporator Core Assembly
Image ' Heater Assembly
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1.Engine coolant. Refer to Draining and Filling Cooling System in Engine Cooling.
2.Heater hoses. Refer to Heater Hoses.
3.Instrument panel. Refer to Instrument Panel Replacement in Interior Trim.
4.Air inlet assembly. Refer to Air Inlet Assembly Replacement.
5.Vacuum lines.
-Clearly label vacuum line connections.
6.Heater assembly studs inside engine bay.
7.Blower motor resistor. Refer to Blower Motor Resistor.
8.Stud inside heater core housing.
-Stud is revealed by removing the blower motor resistor.
9.Rear case screws.
10.Heater assembly.
Heater Hoses
A/C Evaporator Tube Assembly
Evaporator Core
Evaporator Core Assembly
Heater Assembly
Install or Connect
2.Heater assembly.
3.Rear case screws.
4.Stud inside heater core housing.
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5.Blower motor resistor. Refer to Blower Motor Resistor.
6.Heater assembly studs inside engine bay.
-Studs to 1.9 N.m (17 lb in).
7.Vacuum lines.
8.Air inlet assembly. Refer to Air Inlet Assembly Replacement.
9.Instrument panel. Refer to Instrument Panel Replacement in Interior Trim.
10.Heater hoses. Refer to Heater Hoses.
11.Engine coolant. Refer to Draining and Filling Cooling System in Engine Cooling.
-Check the system for leaks.

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Sep 06, 2014 | 1997 Isuzu Hombre

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1991 toyota previa motor and blower not working why

First. Check fuse then check blower motor resistor that not it you probably have bad blower motor

May 24, 2014 | 1993 Jeep Cherokee Country

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Heater blower does not work on 1992 Buick Park Avenue

Hit the blower motor with a hammer handle and see if it starts, if it does replace the blower motor, if it doesn't replace the blower motor resistor located next to the blower motor in the air ducting with the connector sticking out of the air ducting

Oct 17, 2012 | 1992 Buick Park Avenue

1 Answer

I have a 1992 Toyota Previa. The heater stopped blowing air. For the last year the fan would only work on the highest setting.... now nothing. Is it the Blower motor, fan relay, or Switch??? Any idea?...

the last year, your blower resistor has been bad, now your motor is bad. rap on the motor and see if it start to run, if so, replace the motor and the resistor.

Dec 16, 2010 | 1993 Toyota Previa

1 Answer

No heat or air

Check the blower motor speed control resistor pack is ok.
(The resistor pack is usually located in the blower fan ducting in the air flow).
Check condition of electrical connection terminals on the blower motor circuit - these terminals pass considerable current and over time may fatigue overheat and loosen.
Check operation/replace any blower motor control relay,
Check the blower motor will run if +12v directly applied to the blower motor.
Check operation of the blower motor speed control switch is ok.

Oct 08, 2009 | 1993 Dodge Dakota

1 Answer

How do i replace the heater resistor on 1996 previa toyota?

there will be an electrical connector that is protruding from the blower motor housing. If you disconnect this connector then unbolt the housing then the resistor comes right out.

Jun 16, 2009 | 1992 Toyota Previa

1 Answer

Hot air blower dose not turn on anymore Toyota Previa 91

blower motor went bad the motor will cost around $100.
it is easy to change located under the hood behind the plastic air flow shroud there are bolts on firewall and on sides of shroud all you need to do is take top half off then pull out motor don't forget to disconnect battery good luck !! should take 30 to 45 min. even quicker when you have to do it twice like I did. You see the new one only last about a year.

Dec 25, 2008 | 1993 Toyota Previa

2 Answers

Replacing heater blower motor

this is not a problem with thw switch or motor. There is a resistor that is mounted inside the dash on the pasenger side that controls the speed of the blwer..these have a tendency to burn up after 10 years or so... replace the resistor, and you will be fine!

Dec 23, 2008 | 1984 Toyota Pickup Deluxe

1 Answer

Previa, no heat on 1 and 2 gear

the blower motor resistor is bad.

Oct 29, 2008 | 1993 Toyota Previa

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