Vehicle: 2003 Toyota Sequoia,
2WD, V8-4.7L (2UZ-FE)
Problem: The vehicle came in to the shop
because the HVAC blower was not working. The technician found
that the A/C compressor and blower motor were both inoperative.
This vehicle was equipped with an Automatic HVAC system.
Details: The technician said that he could apply
power to the blower motor resistor and the blower motor would
run. Next, he checked for circuit power and found that the 10A
heater fuse in Instrument panel fuse box was blown. He replaced
the fuse but the blower motor still did not work. Looking at the
wiring diagram he realized that there should be power on two
wires at the blower motor relay socket. There was only one wire
He removed the under-hood relay box to check the connectors and
found that the fuse/relay box had corrosion on the connectors.
Confirmed Repair: He cleaned the connectors
and reinstalled the fuse box and rechecked the operation of the
HVAC system. The blower motor and A/C compressor were working