Blower motor stopped working

Tiny
BENGENEGOODMAN93
  • MEMBER
  • 1998 FORD TAURUS
  • 87,000 MILES
Hi I have a 1998 ford Taurus and recently my blower motor stopped working I replaced the relay and I checked the blower motor by putting it on the battery and it works fine I have the automatic temperature control and was leaning towards maybe the resistor.

I really need help it's getting cold and I need to know if it's the resistor or what because the relays new and blower works fine.
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Thursday, November 24th, 2011 AT 9:30 AM

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Tiny
MERLIN2021
  • EXPERT
TEST D: NO OPERATION IN ALL BLOWER SETTINGS
1. Checking Blower Motor Operation
Turn ignition to RUN position. Set A/C-heater system to floor position. Set blower switch to HI.
If blower motor operates, go to next step. If blower motor does not operate, go to step 4).
2. Checking Blower Speed
Turn blower switch to LO. If blower operates, wiggles wires and check for intermittent operation.
Repair wiring or connectors as needed. If blower does not operate, go to next step.
3. Checking Blower Motor Resistor
Check blower switch resistor for resistance between Orange/Black wire terminal and Black wire
terminal. If switch resistor checks okay, repair Orange/Black wire from blower motor to switch
and repair Black wire from heater switch resistor to ground. Retest system. If no resistance is
shown, replace blower motor resistor and retest system.
4. Checking Blower Motor
Turn ignition OFF. Ground Orange/Black wire at blower motor connector. Set A/C-heater system
to floor position. Turn ignition to RUN long enough to check for blower motor operation. If
blower operates, repair open in Orange/Black wire between motor and splice to motor switch and
resistor. Retest system. If blower does not operate, go to next step.
5. Checking Blower Motor Power Supply
Turn ignition to RUN position. Leave A/C-heater system at floor position. Check for battery
voltage at Pink/White wire connector at blower motor. If battery voltage exists, replace blower
motor and retest system. If battery voltage does not exist, go to next step.
6. Checking Blower Motor Relay Output
Turn ignition to RUN position. With A/C-heater system still at floor, check for battery voltage at
blower motor relay Pink/White wire connector. If battery voltage exists, repair open in Pink/White
wire and retest system. If battery voltage does not exist, go to next step.
7. Checking Fuse In Power Distribution Box
Check fuse No. 11 (40-amp) in engine compartment fuse/relay box (power distribution box). If
fuse is okay, go to next step. If fuse in not okay, repair short in Brown/Orange wire or Pink/White
wire. Retest system.
8. Checking Supply Voltage To Blower Motor Relay
With voltmeter, check for battery voltage at relay Brown/Orange wire connector. If battery
voltage exists, go to next step. If battery voltage does not exist, repair open in Brown/Orange wire
and retest system.
9. Checking Blower Motor Relay Supply Voltage
Turn ignition to RUN position. With voltmeter, check for battery voltage at blower motor relay
Pink/Orange wire connector. If battery voltage exists, go to next step. If battery voltage does not
exist, repair open in Pink/Orange wire and/or replace fuse No. 13 (5-amp). Retest system.
10. Checking Function Selector Switch
Pull integrated control panel from instrument panel enough to gain access to connectors. Detach
function selector switch connector. Detach function selector switch connector. With selector
switch at floor, check for resistance between Orange wire terminal and Black wire terminal. If
there is 5 ohms or less, go to next step. If there is more than 5 ohms, replace integrated control
panel. Retest system.
11. Checking Ground Circuit
Check for resistance from Black wire at function selector switch connector and ground. If there is
less than 5 ohms, go to next step. If there is more than 5 ohms, repair open in Black wire and
retest system.
12. Checking For Open In Function Selector Switch Circuit
Remove fuse No. 13 (5-amp) from fuse panel. Check resistance of Yellow wire circuit from
blower motor relay connector to function selector switch connector. If there is 5 ohms or less,
replace blower motor relay. Retest system. If there is more than 5 ohms, repair open in Yellow
wire. Retest system.
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Thursday, November 24th, 2011 AT 1:58 PM

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