1991 Jaguar Sovereign blower motor malfunction

Tiny
MYLUDE234
  • MEMBER
  • 1991 JAGUAR
I have a 1991 jaguar sovereign 180k with automatic transmission it does have a rear main seal leak but the problem today:the blow motors arent producing any output you can hear them switch when you change the position but at no speed can you feel air. The sensors and ecu seem to have proper voltage and the relays checked out good would they coolant temp sensor stop both blower motors to stop functioning or what? What would cause no response from either side? One day I came outside and I had no air. All fluid levels are good, the ac has pressure, and systems are sealed
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Tuesday, July 17th, 2007 AT 12:28 AM

5 Replies

Tiny
JACK42
  • MEMBER
Aside from fuse A2 and B1 the blower fans are entirely controlled by the climate control cpu. Use a test light and check those fuses and see if any power is making to the blowers
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Tuesday, July 17th, 2007 AT 8:03 AM
Tiny
MYLUDE234
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There is the 12 volt constant but that one off the switch which is supposed to be 1 volt when on high 9 when on mediem and 10 when on low only runs at stays at a constant 1.8-1.9 no vaniance when switch is moved
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Wednesday, July 18th, 2007 AT 9:46 PM
Tiny
JACK42
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Are you talking about the power out of the switch or at the blower motors? If it has it into the switch but doesnt vary then it sounds like the switch may be bad
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Thursday, July 19th, 2007 AT 7:40 AM
Tiny
MYLUDE234
  • MEMBER
I unplugged the harness at the blower motor to do my reading it has the 12 volt constant but yes the I think green wire the power out or the variable power stays at 1.8. When you turn the air on it sounds like it is trying to do something " slight noise not much" I havent pulled the dash console apart to test from the switch itself do I need to do so or can I do the readings off the ecu?
Thanks for your help your awesome
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Thursday, July 19th, 2007 AT 5:46 PM
Tiny
JACK42
  • MEMBER
I would start with the switch and work my way to the ecu.
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Thursday, July 19th, 2007 AT 6:08 PM

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