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Jim
Grant has been working in the automotive industry for over twenty
years. In addition, Jim is an ASE Master Technician with advanced
L/1 certification. He works as manager and technician in his
family's automotive business in New Hampshire. He writes weekly
automotive consumer columns and is editor of an automotive newsletter
that is circulated throughout North America. |
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Jim Grant's Tech Tips
96
Dodge Caravan, Blower Motor Won't Shut Off
Q: The heater blower on my ‘96 Dodge Caravan
won’t shut off after the engine is shut off.I tried pulling all the relays.
Nothing works until I pull the fuse to the fan. What is up with this?
A: Guess
what? You missed one! The heater blower for your Caravan has a relay and
it sounds as if the contacts in the relay are stuck in the closed position.
The fuse for the heater has electrical power to it whether the key is
in the on or off position. The relay acts as a gate. When the ignition
switch is in the off position the relay is designed to prevent electricity
from flowing to the blower motor. When the ignition is turned on the relay
is activated and the contacts in the relay close allowing electricity
to travel to the blower motor. If the contacts in the relay get stuck
in the on position electrical power will continue to flow to the blower
motor even with the ignition in the off position. I’m willing to bet a
coffee that a new heater relay will be the fix.
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