Hi I'm new to the form and hope this is in the right place, I am attempting to install a set of C6 seats in a 1971 El Camino I am completely rebuilding. I have the seats and the heater control switches. I was able to find a set of plugs for the seats and the heater switches. I was able to follow a schematic and got the seat motors and the pumps operating. The heater switch has 6 pins which I connected per schematic. The problem is the heaters do not operate correctly. When powered up I get a red light and the buttons do nothing. Can anyone help with a wiring diagram that tells how to make this system work.
Thanks

 

Hope that this helps you.

 

Thank You for the reply. It looks as the heaters need to feed a HCM which feeds a BCM. With that information I don’t think factory heated seats are going to work on a 1971 El Camino that doesn’t have a BCM or a HCM Too many CMs for that old car. Thank You I learned a lot on this one
Ray

 

The C6 seats work properly outside of a C6. I have them installed in two C5's with fully functioning heat.
Here is the pinout for what you would need for a C6 drivers seat, see the attached doc page 6.
Also should mention that the switches for the seat heaters are momentary contact. The indicators are LED's with no need for additional resistors.

Gary

 

Thanks Gary for the reply.
I looked at your C6 connector pin out. The pin out I have on my C6 shows B4 as a Seat Position Switch Low Reference and B8 as a Air Bag Off Indicator Control. I did connect as indicated on your C6 pin out by number. I also tried grounding B4 and B8 then grounding B8 and powering B4. Each time the Hi and Low indicators lit on the C6 seat heater switch as long as the button was held in but would not stay lit upon release of the button. My Seat Belt Switch Signal position on the pin out A2 is empty. I think the belt indicator is connected to a seat belt tensioner reader in the computer somewhere. I was trying to find a way to use the seat heaters in a 1971 El Camino which has no computer controllers.
Thanks Again Ray

 

Attached is the seat schematic for both the driver and passenger seat.





For both seats you need to apply the following to make the seat heaters work.

Pin A1 of the main connector connects to a switched 12v circuit.
Pin A6 connects to a constant 12v source.
Pin B1 connects to a momentary contact switch with the other pin connected to ground, this is the switch that toggles between Hi and Low heat.
Pin B2 connects to a momentary contact switch with the other pin connected to ground, this is the switch that turns the heaters off.
Pin A8 connects to the Low heat LED Anode. The Cathode of the LED goes to ground.
Pin A9 connects to the Low heat LED Anode. The Cathode of the LED goes to ground.

The pins that connect back to the HVAC controller are not needed. If you follow what I posted you will have working seat heaters.

The seat belt indicator wiring is from the switch that is in the seat belt receiver, one wire goes to ground, the other to the C6 IPC for the seat belt light. The circuit is complete (lighting the indicator) only when a seat belt buckle is not inserted.

Let me know if you have any other questions.

Gary