Windows and heater are not working after replacing voltage regulator

Tiny
TRAVIS HILL
  • MEMBER
  • 2007 KIA SPORTAGE
  • 4 CYL
  • 2WD
  • 210,000 MILES
My alternator had a bad voltage regulator. I changed it. Everything seems fine now except my windows won't work now and neither will my heater.
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Monday, December 2nd, 2019 AT 7:28 PM

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Tiny
JACOBANDNICKOLAS
  • EXPERT
Hi,

First, have you checked fuses? That is where I would start. Pic 1 shows the power window fuses. Check them. When you say the heater isn't working, do you mean the blower motor doesn't turn on? If that is the case, you need to check for power to the blower motor relay mounted near the motor itself. There is a white wire that goes to it which should have power. Power is supplied via what is called a fusible link. It isn't a fuse, but functions as one. It looks like a regular wire, but will fail if too much power goes through it.

See pic 2 for fusible link. Pic 3 shows the blower motor relay. It is under the dash near the blower motor. I circled the relay to help.

Here are a few links you may find helpful:

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

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

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester

https://www.2carpros.com/articles/how-to-use-a-voltmeter

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

If there is power to the relay, here is a link that shows how to check a relay:

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

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

Take care,
Joe
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Monday, December 2nd, 2019 AT 8:31 PM
Tiny
TRAVIS HILL
  • MEMBER
Window fuses are good. Haven't checked the motor relay.
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Monday, December 2nd, 2019 AT 9:01 PM
Tiny
JACOBANDNICKOLAS
  • EXPERT
If the fuses are good and they have power, the next step is to check for power at the window switch. Tell me, when the regulator was bad, was it over charging the system?

Joe
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Monday, December 2nd, 2019 AT 9:19 PM

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