Blower

Tiny
POPMGMT2
  • MEMBER
  • 2000 FORD EXPEDITION
  • V8
My front blower only works on high
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have the same problem?
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No
Thursday, December 30th, 2010 AT 1:39 AM

2 Replies

Tiny
MERLIN2021
  • EXPERT
Check the switch and the blower resistor. Test like this:
TEST F: BLOWER MOTOR OPERATES CONTINUOUSLY IN HIGH SPEED

1. Turn ignition on. Press MAX A/C button. Turn blower speed control to LO position. If blower
speed reduces, system is functioning properly at this time. If blower speed does not reduce, go
to next step.
2. Turn ignition off. Disconnect blower motor speed controller 5-pin harness connector C282.
Turn ignition on. Press OFF button on EATC control panel. Measure voltage between ground
and blower motor speed controller harness connector C282 terminal No. 3 (Tan/Orange wire).
See Fig. 12. If more than zero volts exists, repair short to power in Tan/Orange wire. See
WIRING DIAGRAMS. Recheck system operation. If zero volts exists, go to next step.
3. Turn ignition off. Connect blower motor speed controller connector. Turn ignition on. Press
MAX A/C button. Adjust blower speed to LO position. Without disconnecting blower motor
speed controller connector, connect a jumper wire between ground and (backprobe) blower
speed controller harness connector C282 terminal No. 3 (Tan/Orange wire). See Fig. 12. If
blower motor operation stops or slows noticeably, go to next step. If blower motor operation
did not stop or slow, replace blower motor speed controller. Recheck system operation.
4. Turn ignition off. Disconnect EATC module 13-pin harness connector C281. Turn ignition on.
Connect jumper wire between ground and EATC module harness connector C281 terminal No.
23 (Tan/Orange wire). See Fig. 5. If blower motor operation stops or slows noticeably, replace
EATC module. Recheck system operation. If blower motor operation does not change, repair
open in Tan/Orange wire. See WIRING DIAGRAMS. Recheck system operation.
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Thursday, December 30th, 2010 AT 1:43 AM
Tiny
SATURNTECH9
  • EXPERT
Sound's like you could have a bad blower motor resistor do you have a multimeter to do some test's.
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Thursday, December 30th, 2010 AT 1:44 AM

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