2004 330ci heated seats not working after radio install

[noahwinco]

Not sure if there is another thread on this, but the audio guys installed my flip out Pioneer radio and now the heated seats don't work. Is there a fuse that I need to replace? Such a bummer! It was 19 degrees this morning and it would have been so nice to have those on.

I press the heated seat button, all three lights flash for a split second, then they turn off. This is for both the driver and passenger side.

[Pelican Parts]

Hello - take a look at the link below to an earlier thread where the wiring diagram for the stereo is referenced. It may help you figure out where the fuse is.

https://www.bimmerforums.com/forum/s...wiring-diagram

[noahwinco]

I checked the fuses and all of them are fine. I can't figure it out!

[noahwinco]

Thanks for your reply, Pelican! If anyone has any idea, let me know. That was a big draw for me (the heated seats) and now they don't work

[jclausen]

I would take it back and have them take alook

[MIKYZZ4]

Ask installer if he spliced into any other circuit besides the radio power circuit,
I suspect he spliced into the seat heater circuit as an additional power source.
I would return and expect a proper installation, as you've already paid for it.

[noahwinco]

Perfect, will do. Thanks. Bought the car in CA so ill have to have it checked out here in CO

[Mless5]

Do lights next to the button come on when you press it or not at all?

[lisaliyan]

Does the radio really support to connect the heated seats? You'd better ask the customer service for help.

[MIKYZZ4]

Have a diagnostic scan done to narrow down the possibilities,
but you can also check underseat connections by pushing in connectors.
Be careful and don't pull/push them out-then-in, as that can cause errors and airbag malfunctions.

[noahwinco]

Mless5, all three lights flash for a quarter second, then shut off

[noahwinco]

Does the radio really support to connect the heated seats? You'd better ask the customer service for help.

They were working before the install. Beemer just took a look at it and they think it's a heating element gone bad. Both driver and passenger side aren't working. Cost $160 for them just to tell me why. Have more pressing things to fix mechanically right now

[noahwinco]

Have a diagnostic scan done to narrow down the possibilities,
but you can also check underseat connections by pushing in connectors.
Be careful and don't pull/push them out-then-in, as that can cause errors and airbag malfunctions.

Will do. I wish I could find a wiring diagram for the underside of the seats.

[noahwinco]

Mless5, all three lights flash for a quarter second, then shut off

Mless5, all three lights flash for a quarter second, then shut off