Member Since: 21 Apr 2018
Location: Herts
Posts: 217
Discovery 3 electric seats
I am having a play with some D3 electric seats I have picked up. They are stripped and on the bench. I am no auto electrician!
I have read about the 2 sec bursts that the seats move in when fitted to vehicles that didnt leave the factory with electric seats and want to take a look at whether they will work if not connected to the rest of the vehicle - my thinking is that the memory module must be tied in elsewhere to an ECU that also controls wing mirror position? steering wheel position? maybe off of the key as well?? (no idea if this is correct)
First plan is to put 12 volts into the green/brown and white/red feeds into the memory module and see what happens. Does anyone know what the white/red supplies? (VBATT electronic on the wiring diagram??)
If that fails, there must be a way to cut the memory module out of the equation and wire the movement switches via relays to the motors. Four motors, four relays and a direct fused feed from the battery??
Any thoughts/comments?
31st Aug 2018 11:16 am
Erea
Member Since: 19 Mar 2012
Location: Munster
Posts: 1509
There was someone on here recently that put the passengers switchs from a LHD into the drivers side and got it working perfectly.
31st Aug 2018 11:53 am
reb78
Member Since: 21 Apr 2018
Location: Herts
Posts: 217
Interesting. I will have a search.
I have both seats but i am only bothered about doing the drivers seat so can always rob the switches from the passenger side - they don't have the base tilt mechanism on them though do they? This is my primary purpose for doing it - if they had fitted a manual base tilt like on the range rover classic manual seats I wouldn't be bothering at all!
31st Aug 2018 12:08 pm
Erea
Member Since: 19 Mar 2012
Location: Munster
Posts: 1509
The passengers seat should work perfectly straight away if fitted it’s only the drivers seat that has problems.
The switch pack from the passengers seat won’t physically fit on the drivers seat that’s why people have started using LHD ones.
A suggestion would be fit the drivers seat as is with the wires swapped around to get the two second bursts and see if you get used to it.
Or fit a LHD switch pack and add another switch or choose which motors you want to work with what buttons you have
31st Aug 2018 1:52 pm
gstuart
Member Since: 21 Oct 2016
Location: kent
Posts: 13635
Plus 1 what @Erea has mentioned ref the switches
@reb78
Hi
Like many others ive also done this mod
Thing u have to remember is the passenger seat is 6 x way / drivers is 8 x way , which offers the extra seat base tilt which makes the world of difference over the manual seat
That tilt allows the base cushion to support behind ur knees and makes it considerably more comfortable,
One of the best mods I’ve done as the seats are now very comfy
31st Aug 2018 2:01 pm
reb78
Member Since: 21 Apr 2018
Location: Herts
Posts: 217
I was wondering about just cutting the wiring from the drivers side switch and connecting via relays to the motor - looking at the colour codes, it looks like for the drivers seat height, yellow to yellow and white to white should work (with relay in between)? A bank of relays could be mounted neatly where the memory module sits. They may not even be necessary, but it looks like the wire from the switch to the memory module is smaller gauge than the wiring from the memory module to the motor.
What is the height sense and hall sense wiring all about.
31st Aug 2018 2:06 pm
reb78
Member Since: 21 Apr 2018
Location: Herts
Posts: 217
gstuart wrote:
Plus 1 what @Erea has mentioned ref the switches
@reb78
Hi
Like many others ive also done this mod
Thing u have to remember is the passenger seat is 6 x way / drivers is 8 x way , which offers the extra seat base tilt which makes the world of difference over the manual seat
That tilt allows the base cushion to support behind ur knees and makes it considerably more comfortable,
One of the best mods I’ve done as the seats are now very comfy
Thats exactly why I want it Gary. I'd just like to find a way to make the switches work properly. I dont care about the memory function really (although Anna is a lot shorter than me, so it has come in handy on other cars!)
31st Aug 2018 3:08 pm
gstuart
Member Since: 21 Oct 2016
Location: kent
Posts: 13635
Hi
Glad it was of some help
I bypassed the memory module and alas ended up with the short 3 x second burst which to be honest once the seat is set up I’ve not moved it for ages
Passenger side is as mentioned basically plug and play
Drivers side u just need to do the bypass, theres are a good selection of how to bypass the module if u do a quick search
I did this recently and swapped the seat loom and switch pack for a LHD passenger seat switch pack and loom (6 way). Easy to swap, I did it with the seat in the car. 6 way means no seat base tilt at front, which I can I’ve without for now. I went six way switch pack as only 8 way switch I found was £198 on eBay. I’ve since found an RRS 8 way loom for a decent price and A switch pack for £50 plus delivery from Germany. If I’d found this sooner I’d have gone 8 way just because drivers seat was originally a 8 way. Also had to do it quickly as I was going on holiday with family so needed seat to be moveable so wife could drive the car.
2nd Sep 2018 3:20 pm
reb78
Member Since: 21 Apr 2018
Location: Herts
Posts: 217
Interesting. Do you have links for the bits (assuming they had more than one!)?
Looking at the wiring diagrams for the disco switches, do the passenger switches and driver switched operate differently? How do the motors earth? On the passenger side am i right in thinking they earth through the switch?
Think they Earth though the loom into main chassis harness. I used a RHD passenger seat Loom and it worked fine. Just searched on eBay. As for the switch I just searched on eBay for RRS seat switch and set search area to EU.
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