Question about 1993 Jeep Wrangler

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93 4.0L wrangler blower motor works when hot wired direct. No voltage at heater fuse mini-fuse box under dash? Where do I track voltage backward from there?

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  • Jeep Master
  • 21,873 Answers

The 25amp blower fuse is powered thru the key switch.
Do you have power at the key switch for that circuit when it is in the on position ?

Posted on Apr 20, 2013

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6ya6ya
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Posted on Jan 02, 2017

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tepfy
  • 319 Answers

SOURCE: 1999 Jeep Wrangler 4cyl W/AC, Blower quit,

Run a new wire to the motor from the switch this will do 2 things for you. It will tell you if your switch is still good, and if it works you just fixed your problem.

tepfy

Posted on May 03, 2009

  • 1757 Answers

SOURCE: heater fan not working. 40amp fuse under hood ok.

"...wires to fan test hot." But what is the voltage? Since the Fuse and Motor is good, and there is voltage (unk strength) to the Motor; this only leaves the Blower Motor Resistor. Does the Fan work on High Only? Then it is definitely the Blower (Fan) Motor Resistor.

Posted on Jan 11, 2010

  • 740 Answers

SOURCE: 1999 jeep grand cherokee heater fan quit. 40amp

the blower motor resistor is bad replace it and it will work good as new the resistor is located in the same heater box as the blower motor mounted on the outside of the heater box follow the wirring from the blower motor to find it or just simply buy the part and match it up

Posted on Jan 11, 2010

Obertelli
  • 3006 Answers

SOURCE: i have a 1999 Jeep Wrangler and the heater fan

If you bypass the resistor pack and connect the motor directly to the fused 12v supply then the fan should run at maximum speed. If so, it's the resistor pack that's blown: a very common fault on a huge number of makes and models.

Posted on Feb 13, 2010

geterrollin
  • 277 Answers

SOURCE: The heater in my 2000 wrangler does not work.

You will see a round plastic blower motor housing underneath the passenger dash approximately 6-7 inches round, plug the connector back into it and you should be good to go.Let me know if it works for you or if you need further assistance

Posted on Jan 18, 2011

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1 Answer

Location of the heater fan motor on a 05 Chrysler crossfire


Usually, blower motor, under passenger side dash. The fuses as shown, depending on which vehicle. Not only check the fuse, use a test light and check voltage on fuse circuit, hot all the time. At the blower motor connector, red wire is voltage, brown wire is chassis ground. The white wire with pink tracer is probably pwm signal for blower speeds, from hvac control module. My database doesn't have much info on your hvac system.
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Aug 27, 2017 | Chrysler Cars & Trucks

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I have a 2002 chevy s10 blazer when i turn on the heater the lights on the dash will come on like when you are starting the truck and the blower don`t work


Note the diagram for blower motor. Note the fuses, not only check the fuses, check the fuse circuit for voltage, use a test lite. Some of those fuses get ignition feed, they go hot with the key on.
You may have to check feed to and from ignition switch when problem is ongoing? Could be problem with ignition switch? Don't replace anything unless your testing points in that direction.
At the blower motor wire connector, purple wire is voltage, black is ground.
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Nov 25, 2016 | 2002 Chevrolet Blazer

1 Answer

The heater fan just stopped...


Check fuse #14(10amp) located in fuse box under driver steering wheel behind the lower dash cover.
Check fuse#12(40amp) located in fuse box under hood.
Replace fuse(s) if any are blow.

If fuse are good.Check blower and transisto next.
Do steps 1-3 with turn key on
1. Unplug connector and check for 12v at the blue/white wire at the blower motor(2-NAT)
-if there's no voltage you might have a bad relay or open in the wire
-if there's about 12v, go to step 2
2.Plug connector for blower motor and unplug connector for blower transistor(4-NAT). Take a jumper wire and jump the blue/black wire to body ground.
-if blower does not run, replace blower motor
-if blower motor runs, go to step 3
3.check the black wire at(4-NAT) for good ground.
-if you have good ground, then replace blower motor transistor.
good luck

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Jan 18, 2011 | 2004 Honda Element

1 Answer

MY 1991 JEEP WRANGLER CARS HEATER DOESNT WORK


If the blower works check for coolant in the cooling system. Test operation of thermostat. Check heater control valve for proper operation if equipped. Pressure test cooling system to ensure system holds pressure (this will help you identify a leak, if any. If car does not over heat and cooling system is in good working order, then the heater core is clogged.
If the blower does not work Check fuse, relay, wiring for short to ground, apply direct battery voltage to blower motor. If blower motor turns on and fuse/relay and wiring are ok replace the switch.

Dec 14, 2010 | 1991 Jeep Wrangler

1 Answer

Heater blower wont work how can i fix it?


in this order ....check fuse...change switch.....change blower motor.
(if you can get to it from under the dash,you could also check blower by using a hot wire direct to the motor.)

Sep 09, 2010 | 1996 Chrysler LHS

1 Answer

1999 jeep grand cherokee heater fan quit. 40amp fuse under hood good. both wires at motor test hot. motor turns strong when wired direct to battery. now what?


the blower motor resistor is bad replace it and it will work good as new the resistor is located in the same heater box as the blower motor mounted on the outside of the heater box follow the wirring from the blower motor to find it or just simply buy the part and match it up

Jan 11, 2010 | 1999 Jeep Grand Cherokee

1 Answer

Heater fan not working. 40amp fuse under hood ok. wires to fan test hot. motor turns strong when hooked directly to battery


"...wires to fan test hot." But what is the voltage? Since the Fuse and Motor is good, and there is voltage (unk strength) to the Motor; this only leaves the Blower Motor Resistor. Does the Fan work on High Only? Then it is definitely the Blower (Fan) Motor Resistor.

Jan 10, 2010 | 1999 Jeep Grand Cherokee

1 Answer

Air conditioner and heater not blowing


either the reostat or the computerised control box,try running a wire direct from the fuse for the heater to the blower motor ,one motor each side of the vehicle ,Their is a computerised control box up under the dash and its nigh on impossible to reach ,well the feed for both motors loops through this box and thats all they do nothing else so run a wire from each heater fuse on either side of the footwell to the blower motoer and it will all work with no problems at all

Jan 07, 2010 | 2000 Jaguar S-Type

2 Answers

1999 cadillac deville blower dont operate. What should the voltage be at the red wire and the gray wire or the black wire ? Iam assuming the red wire should be 12 volts, the gray wire should be variable...


red black and gray are just half the connections. Red is positive 12 volts coming from fuse of circuit breaker. The black wire is either the ground or the main hot wire going to the blower motor (3 pin connection only), and the gray wire (if is is small in size) is a variable voltage coming from the body control module requesting speed for the blower motor.The blower control module varies voltage on the main wire going to the blower motor, supposedly in accordance with the requested voltage from the body control module. Usually if all fuses are okay and present on the apprpriate wire of the blower control module, the a blower motor that will not run or stays running after the key is turned off is the fault of the blower control module. If the blower control module has failed the the cause must be determined (over amping blower motor) or else new blower control module may fail when powered up.Usually blower control modules have more than three wires. Usual connections are: B+ (battery voltage) GND (chassis or engine ground), two large wires going directly to blower motor (can be any color, but are usually 10 guage in size), and an optional wire that reports voltage level back to the body control module.

Jan 11, 2009 | 1999 Cadillac DeVille

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