Question about Cars & Trucks

1 Answer

Blowing 50 amp high blower fuse instantly in 1997 3500HD sierra GMC.. all other speeds work except for High speed..

Posted by on

1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that gotĀ 5 achievements.

    Hot-Shot:

    An expert who has answered 20 questions.

    Corporal:

    An expert that hasĀ over 10 points.

  • Expert
  • 27 Answers

I would suspect a short in the blower motor. Lower speeds are through resistors, high speed is direct to the motor. Unplug the motor and try going through the speeds.

Posted on May 04, 2017

  • Randy Moon
    Randy Moon May 04, 2017

    I disconnected the blower.. both ground and positive wires, replaced fuse, no luck still wants to blow.. I have replaced relay and resistor prior, thinking this was the issue.. hate to get a new blower with no fix.. any help or advise.. I have also replaced the temp control.. scratching my chin.

  • Rich Hines
    Rich Hines May 04, 2017

    Sounds like a shorted wire somewhere between the high relay and motor. Testing with a multimeter and visual inspection.

×

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

I installed new resistor and connector and speed 5 won't work on blower on 2005 gmc sierra


High speed on the blower fan does not work thru the resistor.
There is a seperate circuit that sould feed 12 volts directly to the motor. If you have access to a schematic it would help.
The connectors for the high speed, burn out a lot. If you cant find I could look it up.

Oct 22, 2013 | 2003 GMC Sierra 1500

1 Answer

Ford contour blower fuse blows when a/c turned on


Does the fuse blow if the compressor clutch is unplugged ?

Jun 17, 2013 | Cars & Trucks

1 Answer

1995 GMC Sierra fan blower not working.


In the beginning you should check for voltage and ground.
The 50amp fuse marked AC powers the blower motor and the motor is grounded.
The high speed relay bypasses the resistor. So you should have power coming from the fuse and thru the high relay. Then the resistor for the other speeds gets power from the heat and ac control module which also controls the blend doors.
You may need a shop manual or repair book to get the diagrams.

Jan 12, 2013 | 1995 GMC Sierra C1500

1 Answer

5 speed fan has only 1 speed that is on high-5th speed


GM truck have 2 Blower fuses. One for HIGH ONLY and the other for the rest of the speeds. Check the fuses and check the owner's manual for the location(s) of the fues boxes. There are more than one...Good Luck

Apr 19, 2011 | 2003 GMC Sierra 1500

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

All the heater blower speeds work on my 1998 Suburban except the high speed. I have replaced the blower motor and the switch. What else could the problem be? I have seen some writings about a resistor but...


Hello Boco.

In your Suburban there is a high blower relay.
When the switch to high is selected it activates a relay to another circuit that is fused separately.
This fuse in under the hood marked blower fuse 3 which is a 50 amp fuse.
This is most likely the problem.
However, if it isn't then the problem becomes the relay, the switch or a broken wire.
If it isn't the fuse, contact me back here using comments and I will help you with the next step in fixing your heater blower.

Thank you for using FixYa.

KL

Jan 21, 2011 | 1998 GMC Suburban

1 Answer

2005 gmc sierra heater fan quit working. I lost the fifth speed months ago and a couple of days ago lost the other four, the first day the fan would come on sometimes while driving then quit after a while...


1-4 speed are the blower motor resister . It controls all 1-4 speeds, also it's under the passanger side dash around fan, the 5th speed runs off a fuse the is located in the fuse box. It's one of those square fuses , not the relays but fuses. The resister will run $15 and fuse $5 . Good luck. I have replace these before

Jan 03, 2011 | 2003 GMC Sierra 1500

1 Answer

My blower fan only works on high


you will need to order a blower resister its easy to swap out

Dec 11, 2009 | 2000 GMC Sierra

4 Answers

1998 GMC Sierra pickup truck cabin fan problem


Your blower moter is under your glovebox and very easy to replace.I dont think thats your ploblem.I would pull off the dash.It will snap right off without breaking anything.Then pull out the part that holds the selector switch for the fan speed.Then you unplug that switch.Clean the copper contacts.Plug it back in.If everything works again like it should and did in my truck then it is either that switch that is bad or the wiring harness.I would replace that switch.

Oct 20, 2008 | 1998 GMC Sierra

Not finding what you are looking for?
Cars & Trucks Logo

Related Topics:

26 people viewed this question

Ask a Question

Usually answered in minutes!

Top Cars & Trucks Experts

yadayada
yadayada

Level 3 Expert

75005 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22095 Answers

Randy Ohler

Level 3 Expert

14585 Answers

Are you a Car and Truck Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...