Question about 1990 Isuzu Trooper

2 Answers

Electrical problem with heater on 1990 isuzu trooper

Heater fan does not respond to control. I tested the control switch, it is good. Fan motor is good it works with direct connection to battery. fuse is good. Can't find the problem.
xwrayec@gmail.com

Posted by on

2 Answers

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer

Heater fan does not respond to control. I tested the control switch, it is good. Fan motor is good it works with direct connection to battery. fuse is good. Can't find the problem. check the relay they are good checked the resistor it's good but no power the switch can you help thanks

Posted on Oct 07, 2008

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer

I may have the same problem in my '92, but in addition the charging system doesn't work and the "low fuel" warning light stays on (as does the "battery" warning light...but that may be working correctly since the charging systen isn't working). Oddly enough the heater fan and "low fuel" light seem to work normally when I remove the "engine" fuse from the fuse panel in the cabin. Of course when I remove that fuse the engine won't start (so I don't know if that fixes the charging problem too).

I assume that the car is wired such that nearly all of the battery power is directed to the starter when cranking and then is allowed to power other devices when the starter motor is no longer engaged. I theorize that there must be a device that senses when the engine is running and that directs the power.

So, How's my theory and where and what is that device?

Posted on Nov 02, 2008

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Where is the heater fan relay switch on a 1981 Isuzu pup


Blower motor fuse - IsuzuPup.com

www.isuzupup.com/viewtopic.php?t=18202
Mar 4, 2013 - Never seen a blower motor without a relay whether it has a/c or not. Just trace the wires from the blower speed switch. 1989 Isuzu Trooper S/ ... Blower motor turning instruments cluster lights on?
Apr 8, 2013
Blower motor problems
Jun 29, 2012
wiring diagram for 82 luv/pup
Jan 3, 2011
blower fan control, 81 luv diesel
Oct 14, 2009
More results from www.isuzupup.com

1981 ISUZU PICKUP 2.2L L4 DIESEL Auto Parts - RockAuto


Nov 29, 2015 | Isuzu Cars & Trucks

1 Answer

What causes heater blower to barely work on high? wont work at all on low


A couple of possibilities; air path blocked by debris (mouse nest, etc.), the sleeve-type phosphor-bronze fan bearings are clogged with wear particles, less likely but still possible is a failing blower switch, failing ground for the fan motor or an oxidized fuse or fuse holder.

A multimeter would be handy to isolate the source of the problem.

With your headlights on and shining on a vertical flat surface, try noticing if they dim very briefly when you quickly turn the blower on.
If not, then the fan isn't getting full current, if they do, then this would indicate a bearing problem with the fan.
Good luck-

Jan 09, 2015 | 2001 Isuzu Trooper

1 Answer

Dodge Stratus R/T fan doesn't come on while car is running and car is getting hot.


FAN NOT WORKING


It can be issue with faulty motor or its faulty fan control relay.


Bother are to be inspected.

Test volt at fan relay and fan motor.

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

For more help, I suggest you to go through the troubleshooting links mentioned below:-----

Click the link below: ------

How to replace Cooling Fan on Acura Car models?

http://repairhelpcenter.blogspot.com/2011/11/how-to-replace-cooling-fan-on-acura-car.html

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

OBD Code P1490 low speed fan relay ckt open-short

http://schematicsdiagram.blogspot.com/2012/11/obd-code-p1490-low-speed-fan-relay-ckt.html

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

Engine cooling components working?

http://repairhelpcenter.blogspot.com/2011/11/engine-cooling-components-working.html

----------

How does Vehicles Engine cooling system works?

http://repairhelpcenter.blogspot.com/2011/11/how-does-vehicles-engine-cooling-system.html

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

Hyundai Sonata cooling fan not working

http://schematicsdiagram.blogspot.in/2012/02/hyundai-sonata-cooling-fan-not-working.html

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

Fuel pump relay and cooling fan relay troubleshooting on 1997 ford thunderbird?

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

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

Fan belt routing diagram for 2004 Volkswagen Jetta?

http://carbeltrouting.blogspot.com/2011/12/fan-belt-routing-diagram-for-2004.html

---------

Timing belt, drive belt, serpentine belt, accessory belt, fan belt, engine belt routing diagrams for all types of car models?

http://carbeltrouting.blogspot.in/2012/02/timing-beltdrive-beltserpentine.html

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

A/C, heater, defroster fan, not working?

http://technoanswers.blogspot.in/2012/02/ac-heater-defroster-fan-not-working.html

---------

Blower fan not running on Isuzu trooper?

http://technoanswers.blogspot.in/2012/02/blower-fan-not-running-on-isuzu-trooper.html

---------

How to replace blower motor fan assembly on 2000 GMC Yukon?

http://repairhelpcenter.blogspot.com/2012/01/how-to-replace-blower-motor-fan.html

----------

Heater AC or defroster fan not working on KIA?

http://technoanswers.blogspot.in/2012/02/heater-ac-or-defroster-fan-not-working.html

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

These will help.

Thanks.

Nov 27, 2012 | Cars & Trucks

3 Answers

Fan won't work


It can be issue with faulty motor or its faulty fan control relay.
Bother are to be inspected.Test volt at fan relay and fan motor.-------------
For more help,i suggest you to go through the troubleshooting links mentioned below:-----Click the link below:------

How to replace Cooling Fan on Acura Car models?

http://repairhelpcenter.blogspot.com/2011/11/how-to-replace-cooling-fan-on-acura-car.html
--------------

OBD Code P1490 low speed fan relay ckt open-short
http://schematicsdiagram.blogspot.com/2012/11/obd-code-p1490-low-speed-fan-relay-ckt.html
---------------

Engine cooling components working?

http://repairhelpcenter.blogspot.com/2011/11/engine-cooling-components-working.html

----------

How does Vehicles Engine cooling system works?

http://repairhelpcenter.blogspot.com/2011/11/how-does-vehicles-engine-cooling-system.html

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

Hyundai Sonata cooling fan not working

http://schematicsdiagram.blogspot.in/2012/02/hyundai-sonata-cooling-fan-not-working.html

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

Fuel pump relay and cooling fan relay troubleshooting on 1997 ford thunderbird?

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

Fan belt routing diagram for 2004 Volkswagen Jetta?

http://carbeltrouting.blogspot.com/2011/12/fan-belt-routing-diagram-for-2004.html
---------

Timing belt, drive belt, serpentine belt, accessory belt, fan belt, engine belt routing diagrams for all types of car models?

http://carbeltrouting.blogspot.in/2012/02/timing-beltdrive-beltserpentine.html
-------------

A/C, heater, defroster fan, not working?

http://technoanswers.blogspot.in/2012/02/ac-heater-defroster-fan-not-working.html
---------

Blower fan not running on Isuzu trooper?

http://technoanswers.blogspot.in/2012/02/blower-fan-not-running-on-isuzu-trooper.html
---------

How to replace blower motor fan assembly on 2000 GMC Yukon?

http://repairhelpcenter.blogspot.com/2012/01/how-to-replace-blower-motor-fan.html
----------

Heater AC or defroster fan not working on KIA?

http://technoanswers.blogspot.in/2012/02/heater-ac-or-defroster-fan-not-working.html
------------These will help.Thanks.

Nov 27, 2012 | Cars & Trucks

1 Answer

My 1991 isuzu trooper heater blower fan is not working, nor when i turn it to the airconditioner the compressor does not engage. i checked all the fuses except the ac relay fuse block, what could the...


if the lower fan speeds dont work but the fastest speed does the heater fan resistor block needs replacing. If the highest fan speed doesnt work leave it on there and check for power at heater blower fan, if power is on one wire and the other is an earth the blower motor fan needs replacing. Use a normal globe test light to check this. If no power on any wires to fan go back and check all fuses in car and under bonnet with same test light. If fuses are ok possible open circuit wire to fan.

Jan 13, 2011 | 2004 Isuzu Rodeo

2 Answers

Im trying to troubleshoot a non-funtioning blower


To test the blower motor run a jumper wire from the hot side directly to the hot terminal on the battery. If the motor is in good condition it should come on. If it comes on that may indicate a bad resistor pack. Since the resistor is an electrical part which is self-contained would probably be easier to change than to test. You should do the resistor pack first (before the switch) because it is the easier of the two to change out. If replacing the resistor pack does not fix the problem then you will need to replace the switch.

Jul 23, 2010 | 2000 Isuzu Trooper

1 Answer

Heater fan stopped. Voltage at motor, motor runs, all climate control indicators are working


I'm assuming that you know for sure that the fan speed button is in perfect operating condition - you have tested it. In that case the problem is definitely in the electrical motor of the fan. To replace it you must dismantle the dash - it's a long and complicated job, if you haven't done that before or at least have a pretty good idea of what's involved in that you better leave it to a pro. A shop visit is mandatory and it's going to be reasonably expensive, it's a 2 day job.

Jun 30, 2010 | 1990 Nissan Pulsar

1 Answer

1986 trooper isnt putting any heat and isnt blowing at all


check the fuses for the fan. could be a blown fan motor, bad switch...or maybe water heater core bad, hot water valve bad, disconnected heater lines in the engine compartment... all possiblitlies

Dec 12, 2009 | 1986 Isuzu Trooper

1 Answer

Intermittent operation of interior fan - isuzu kb/trooper


fan speed resistor block blown if fan works only on full speed (because power goes directly to fan on full speed, not through resistor)
if fan doesnt work on full speed check for power at fan on full speed with test light if power there fan faulty
no power check switch bank assembly

Aug 06, 2009 | 1999 Isuzu Trooper

Not finding what you are looking for?
1990 Isuzu Trooper Logo

383 people viewed this question

Ask a Question

Usually answered in minutes!

Top Isuzu Experts

yadayada
yadayada

Level 3 Expert

60667 Answers

Steve Hurc
Steve Hurc

Level 3 Expert

450 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

21936 Answers

Are you an Isuzu Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...