Hi there, I’m trying to fit L320 RR sport seats into a transporter and have sorted all the wiring to make them adjustable but can’t find a diagram for the heating elements. It’s one black plug with two white/yellow wires, one brown and one grey. I’ve found other diagrams but they seem to be different. So any diagrams or information to make them work would be much appreciated. Thank you
L320 heated seat info
- Thread starter Bahama66
- Start date
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What year L320? More to the point, how are you going to control the heater elements? as a minimum, you need to be switching the 12V on & off and change the frequency based upon the output of the thermistor. The ATCU switches asymetrically (PWM) but you could probably make it work with a symmetrical square wave. The wiring colours don't seem right to me. the white/yellow are more like SRS / airbag colours....
They’re from a 2007. I’m just keeping the circuit simple and using a toggle switch with relay to supply a constant power as I’m not fussed about the different heat settings and can just turn them off to save overpowering the elements. I’ve traced the wires and they’re the colours
Then it will be the larger cross-sectional area ones that are the power connections. I seriously doubt the heating elements will last very long if they're constantly powered, some combination of melted seat base, burnt seat cover and burnt-out heating element is likely to occur - things will simply get too hot too quickly with no regulation.
I’ll have a further look into it but can wire something in if need be
Datatek
Well-Known Member
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- 45,015
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- Near Poitiers SW France
For simple, just use a DC/DC power supply in circuit to reduce the voltage at the elements. As I hate heated seats, I wouldn't bother, haemerroid cultivators.
I’ll have a look into them, thank you
