04 Tribute Seat Heater Comes On By Itself - Automotive Wiring and Electrical


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04 Tribute Seat Heater Comes On By Itself

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Auto Repair Home>> Automotive Repair>> Automotive Wiring and Electrical

MarkTheMule
New User

May 7, 2012, 12:29 PM

Post #1 of 3 (1527 views)

04 Tribute Seat Heater Comes On By Itself	Sign In

I have a 2004 Mazda Tribute. The seat heater on the passenger side sometime comes on be itself when the car is started. Usually there is a passenger in the seat. But on rare occasion it has come on without a passenger (may be more often - without a passenger it's hard to know). This has happened since the car was brand new. At first, I was told passengers were setting the heater on by hitting the button with their leg. But the button is quite recessed and it has since then been observed being on without a passenger. It has been to shop repeatedly. Supposedly had the seat heater control boards replaced (both front seats). But it still does it. Anyone else have this happen?

Discretesignals
Ultimate Carjunky / Moderator
Discretesignals profile image

May 7, 2012, 6:07 PM

Post #2 of 3 (1462 views)

Re: 04 Tribute Seat Heater Comes On By Itself	Sign In

The passenger seat heater is controlled by a heated seat control module (processor). If the heater is activated only after or during starting of the vehicle, I would be looking for voltage spikes in the ignition power feed for the module during cranking or starting. It's possible a voltage spike could cause the processor to turn on the heater without pressing the button. If the power and ground circuits for the module are clean, I would disconnect the switch and see if the module still turns on the heater by itself. If it does, probably would replace the module.

Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.

(This post was edited by Discretesignals on May 7, 2012, 6:09 PM)

Tom Greenleaf
Ultimate Carjunky / Moderator
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May 8, 2012, 10:34 AM

Post #3 of 3 (1442 views)

Re: 04 Tribute Seat Heater Comes On By Itself	Sign In

The more I read the posts the more I like my 1960 Rambler!

Smile - Tom

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