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11th December 2019, 20:31 | #1 |
Gets stuck in
75 Tourer Automatic conn, 75 Saloon Automatic Conn, The Monograme Spice Tourer Join Date: Jun 2014
Location: Johnstone
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Which wire is the seat heater
Looking for advice here. My drivers seat heater is not working.
I have a selection of new carbon heat pads. Any time I have done this job in the past I have just run a new loom to activate the pads. This time I would like to use the existing wiring if that is possible. Can any one out there tell me which plug under the drivers chair and what are the wire colours. Pictures would be great. I would like to cut the existing wires for the heat pads and connect the replacements direct to the existing wiring. Help please!!!! Sent from my iPad using Tapatalk |
11th December 2019, 20:38 | #2 |
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R75 CDTi Auto Conn SE Mk1 Saloon Join Date: Feb 2010
Location: Crowthorne, Berkshire
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If you're using the OEM wiring, then the car switches the earth to the seats. In the under seat multiplug, that is the thick yellow wire. The ignition switched +12v is thick orange/yellow wire.
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The only 75 with a non-factory fitted, factory fitted sunroof!!!! |
11th December 2019, 20:48 | #3 |
Gets stuck in
75 Tourer Automatic conn, 75 Saloon Automatic Conn, The Monograme Spice Tourer Join Date: Jun 2014
Location: Johnstone
Posts: 670
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I have always assumed that the switched earth switches work in the same way as a normal switch. I have always believed the switched earth fires a relay that powers the accessory.
Am I right in this assumption. From inspecting a heated seat switch the circuit inside would appear to start a timer that runs for about 20 mins or there about. Does it fire a relay and if so where is it. Just thinking another possible place for the fault. Alan Sent from my iPad using Tapatalk |
11th December 2019, 20:54 | #4 |
I really should get out more.......
Now Other Manufacturer Join Date: Nov 2006
Location: Co. Kerry
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There is no relay, the seat heaters are controlled by a temperature sensor in the seat, and the electronics in the switch.
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