New blower motor, /heater still not coming on?

VICKY GUZMAN

MEMBER
2010 TOYOTA CAMRY
2.4L
4 CYL
2WD
AUTOMATIC
280,000 MILES

My A/C (live in the deep hot south) has been intermittently working. Initially I could hit the passenger side glove compartment area and voila it would work perfectly. That started to not work as well anymore as the months went on. I could bang and bang and it would only kick on for a few.
So, after a few hot days of little to no A/C, I purchased another blower motor on Amazon. Put it in and nothing. The buttons to the ac turn on fine but the fan won’t turn on. Even if I tap it. I don’t see any melted or cut wires. The connector to the blower motor is intact. What now? Please help.
Hot in Mississippi.

1 Reply

JACOBANDNICKOLAS

MECHANIC
108,388 POSTS

Hi, Hot in Mississippi. This is Cold in PA. LOL It's 38 degrees.

Based on what you described, we likely have a faulty connector or a wiring harness issue. I don't know how comfortable you are performing a few tests, but I attached them below.

On the connector at the blower motor, there is a three-pin connector. One pin is battery voltage, one is ground, and one controls the blower speed.

If the fan isn't working at all now, we need to first check a fusible link in the under-hood fuse box. When you check this, in addition to confirming the fuse is good, also check to make sure there is power to and from it.

Here is a link you may find helpful:

https://www.2carpros.com/articles/how-to-check-a-car-fuse

If that is working properly, we need to disconnect the blower motor. Pin 1 in the connector (see pics below) should have continuity to ground.

If that is good, check pin 3 for battery voltage. If that is good, we need to check the resistance at the ac manifold. (See pic below).

Here is a link that may help you:

https://www.2carpros.com/articles/how-to-check-wiring

Let me know if this is something you feel comfortable doing. The idea that you were able to hit the glove box and it worked leads me to think we have a weak connection at some point.

Let me know what you find or if you have other questions.

Take care and stay cool.

joe

See pics below.

Images (Click to make bigger)