Please help - Heated Seat Wiring...

[Andy4639]

Here is how mine work. The factory heaters work off the module that is stuffed under the seat. It only controlls the heaters. I couldn't get the drivers side to work so I bought new ones and replaced the heaters and switches.


http://67-72chevytrucks.com/vboard/s...d.php?t=645808

[sambob2285]

BP68 can you check and see how much different it is in the 2003 seats with the same options? I have read that in 03 they changed it up and there was some control modules that had to be in the system to function.

thank you so much for the info the best info I have found on this!!

Originally Posted by BP68

He is the description of how the heated seat system works for a 2002 Silverado straight from the GM Technical site (I work at a dealership)
Hope it helps some.


The heated seats system for the driver and passenger seat consists of the following components:

• Heated seat switch

• Seat cushion heater element

• Seat back heater element

• Heated seat module

• Heated seat cushion thermistor

• PTC device

• SEO2 30A fuse

• IGN3 10A fuse

Heated Seats System Operation

Both the driver and passenger seats have 2 heating elements. One is in the seat cushion and the other is in the seat back. The heated seats are capable of obtaining temperatures of 98°F in LOW mode and 107°F in HIGH mode. Battery voltage is supplied to the heated seat module from the SEO2 30A fuse and through a PTC device. The PTC is hardwired in the battery voltage supply circuit in the seat harness assembly and provides extra circuit protection. Ignition voltage is supplied to the heated seat switch from the IGN3 10A fuse. When the heated seat switch is pressed ignition voltage is supplied to the solid state switching device within the heated seat switch assembly. The first time the heated seat switch is activated the solid state switching device supplies voltage to illuminate the high LED indicator and a signal voltage to the heated seat module indicating the high mode is active. The second time the heated seat switch is activated the solid state switching device supplies voltage to illuminate the low LED indicator and a voltage signal to the heated seat module indicating the low mode is active. When the heated seat module receives a high or low mode active signal from the heated seat switch signal circuit, battery voltage is supplied to the seat cushion and back heater elements. The heated seat cushion thermistor provides a signal to the heated seat module used to determine the seat cushion temperature. The heated seat module regulates the supply voltage to the heater elements according to the inputs from the heated seat switch and the seat cushion thermistor.