Question about 1995 Isuzu Pickup

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1995 Isuzu p/u truck keeps blowing out the 20 amp fuse on the heater.

Have replaced the the heater blower motor and blower motor resistor twice in the last 7k miles. The heater will not work again. I checked to see if the 20 amp fuse was blown, and it was. I put a new 20 amp fuse in and then I turned the heater fan on, I hear a pop and the fuse was blown. Put a 25amp fuse in and the same thing happened. Not sure what is causing this, andn afraid that I wil have to put in another blower motor and resistor. Any idea of the problem?

Posted by Anonymous on

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  • 141 Answers

Sound's like a earthing problem , try a continuity test from blower LIVE to chassis , if get continuity then def got a wiring problem , very difficult to diagnose without seeing vehicle , get a auto electrician

Posted on Jun 11, 2017

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Posted on Jan 02, 2017

  • 261 Answers

SOURCE: Heater Fan/Blower does not work.

what you need is a blower motor resistot

Posted on Dec 04, 2008

  • 13 Answers

SOURCE: Blower Motor Resistor for front AC/Heater

remove glove box....its in the casing near motor.....2 screws and 1 connector

Posted on Feb 15, 2009

emissionwiz
  • 75197 Answers

SOURCE: I own a 99' Isuzu rodeo, fixed blower fan and doesn't work.

just replace the resistor, the thermal limiter is blown.

Posted on Mar 12, 2009

  • 534 Answers

SOURCE: Subject: 2004 isuzu rodeo...my ac/heater blower is not working

The resistors are in circuit only on the lower fan speed settings.
On the highest speed setting, power is switched directly to the fan motor.
Check fan power supply fuses,
Check power is available to the fan when high speed selected.
If all above OK, apply power directly to the motor to verify fan motor runs- if it doesn't the motor may need replacement/repair.

Posted on Jul 29, 2009

  • 7353 Answers

SOURCE: Blower motor on 96 Isuzu Rodeo does not blow on

if fuses are good, check for power at blower motor, when truck is running and a/c on. the resistor and the switch provide ground, so the blue/white wire should have power, and the blue/black wire should have NO power, if it does have power, then most likely the resistor is bad. if it has no power and the motor doesnt run, the motor is bad.

Posted on Oct 20, 2009

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My 07 Chevy express van 3500 6.0 engine, we had the AC compressor replaced. It stopped blowing,replaced the resistor and blower motor. AC keeps blowing the 20 amp fuse under the drivers seat!


Insure that the 20 amp fuse is the correct size. Might it be shown to use a 30? Otherwise, when compressor was replaced, was drier, orifice tube replaced and proper amount of oil added?

May 16, 2015 | Chevrolet Express Cars & Trucks

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Got a1996 gmc safari when i turn on the heater the fuse blows... its a 20 amp


The resistor is not the likely candidate for a fuse problem. There is either a short in the electrical wiring to the blower motor, or the blower motor itself is faulty, causing the fuse to blow. Disconnect the blower motor from the circuit and try turning it on. If the fuse doesn't blow, it's probably the motor.

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Heater fan not working - 30 amp HVAC fuse blows out repeatedly when replaced. Where should I look for root cause? Have dash disassembled, but can't see any bare wires anywhere behind radio/climate...


Try unplugging the blower motor, heater control unit and blower motor resistor. Replace the fuse then reconnect the items 1 by 1 and see what pops the fuse.

Oct 19, 2013 | 1997 Pontiac Grand Prix

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Is there a blower motor relay or fuse on a 1995 Mazda Protege lx?


That fuse sounds like it powers the ac compressor.
The blower motor usually takes a 30 amp fuse.
Does the blower motor work if you hook it to direct voltage ?

Jul 04, 2012 | Cars & Trucks

1 Answer

A/C and Heater Problem


Well,you eliminated the resistor,so it probably means the blower motor has shorted out.Either that or something has gotten into the blower wheel and jammed it. If you can bypass the resistor and just put 12 volts into the motor,do it.But don't hold it long,as a direct short can cause a fire without a fuse to blow for safety.
In other words,prepare to buy a new heater blower motor. don-ohio

Nov 05, 2011 | 2000 Ford Focus

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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.

Jul 18, 2011 | 2006 Isuzu i-280

1 Answer

1992 gmc pickup keeps blowing heater fuses I replaced the blow motor and it keeps blowing


Have you replaced the blower resistor . some times they can cause the fuse to blow . You may need a muiltmeter to test the current draw on the blower motor circuit. the draw should be less then half of the rated fuse .( 20 amp fues draw is less then 10 amps) You did not say but does the blower work on high only or the lower speeds with out blowing the fuse ? if it does work on low or high with out blowing the fuse i would replace the blower resistor

Mar 06, 2011 | GMC Sierra 1500 Cars & Trucks

1 Answer

The heater / blower in my 1992 dlx has stopped working all fuses ok


Hello hfg.

1. First of all, tap the blower motor gently to see if it starts it. If it does, the brushes or the armature in the motor are worn- replace the motor.
2. If that doesn't help wiggle the connector on the motor and the blower motor resistor. There may be burned or loose connections.
3. If you have power on fuse 7 with the key on, then check for power at the blower motor on the blue white wire. If no power on it you have a break in the wire between the fuse and the blower.
4. Next, check for power on the blue black wire. If there is power there that proves there is continuity through the motor(that's good), if not, replace the motor.
5. The blue black wire then goes to the blower resistor. this resistor gives the different blower speeds.
inside the resistor there is a thermal fuse. It isn't replaceable, only the resistor as an assembly.
If the thermal fuse blows it may indicate that the blower motor is beginning to wear out and draw too many amps. And then you may need to replace both the blower and the resistor.
Check with an ohmmeter across the thermal fuse. If it is open circuit, replace the resistor and the blower. If you don't replace the blower it may blow the new resistor again.
6. If it all checks out to this point, ground the blue/red wire at the resistor. If the blower comes on the problem then becomes the blower switch or a break in the wire to the switch.

Whew.. Hope this helps solve the problem, my fingers are sore..Ha.

Thanks for using FixYa.

KL

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1 Answer

Fuse#28 (5A, air-conditioner, blower, heater) keeps blowing on my 2001 BMW 325i. It kills the whole A/C, heater, blower console. I replaced my fuse twice but it's blown again after a few days. These...


maybe you have caused a short somewhere when replacing the overflow bottle... what i would do is run a 5 amp higher fuse NO MORE THEN 5 and if this blows then you have a bigger problem

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1 Answer

Ac/heater blower motor issues


Replace the motor and resistor at the same time. A motor that has too much resistance will blow the resistor out every time. Been there done that. I've sold a lot of resistors and they had no warranty unless you replaced the motor too.

Jul 09, 2009 | 2001 Isuzu Rodeo

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