P38 heated seats

[LavisLane]

Not that i need them in the current weather, but is there a way to get the seat heaters working?

[fraser130]

:lol2:

[andrew e]

Not that i need them in the current weather, but is there a way to get the seat heaters working?


i cant see why not. I would assume the rest of the wiring is there too, just not the buttons and the relays. The next car i rip apart, i will pay a bit more attention to it.

Andy

[glenhendry]

Did all Australian specced P38s have the heated seats deleted?

I dont pretend that in Brisbane we need them often, but us Brisbanites can really whinge about the cold because we are not used to it, and there is nothing I like more than having my arse warmed in my 2008 Kluger seats one month a year.

Its a shame my HSE Rangey cant boast about the same feature.

[Scouse]

I have seen the odd late model P38 with heated seats. I don't know if it was an option or standard though.
According to the EPC, cars with heated seats also had heated windscreens.

Mine doesn't have them but it's a fairly early model.

[p38arover]

I've heard (but not checked) that HSEs have the heater elements in the seats but the HEVAC panel doesn't have the switches.

[wayneg]

Mine has the switches on the hevac panel but they dont appear to do anything. Also has a switch for heated front screen but I cant see any elements. Its never misted over so I cant see if it works. The door mirrors are heated.

[p38arover]

Mine has the switches on the hevac panel but they dont appear to do anything. Also has a switch for heated front screen but I cant see any elements. Its never misted over so I cant see if it works. The door mirrors are heated.

If it has the heated screen you'll see the harness under the plenum filter is connected to the screen. You might have to wait until you do the filter next.

[daljames]

My Autobiography has them in the seats, but no buttons on the HEVAC. I can turn them on with the faultmate though! I just cant drive it with the faultmate connected!

[redandy3575]

Mine has the heated front windscreen and you can slightly see the element if you look closely. Works great in in Winter, defogs the screen almost instantly, i love it!

[andrew e]

I've heard (but not checked) that HSEs have the heater elements in the seats but the HEVAC panel doesn't have the switches.

correct for all the ones i have ripped apart.

Andy

[glenhendry]

Hmm, that is very interesting. Now it is time for RAVE research to understand how to replicate the switches and test to see if the BeCM has any input to the process and if the Australian programming of BeCMs disables the elements in a different way.

Are the HEVAC switches a mechanical toggle switch like the hazard lights or a momentary switch like the air distribution switches?

Does the heated seat switch retain its setting after removing the key?

[daljames]

Hmm, that is very interesting. Now it is time for RAVE research to understand how to replicate the switches and test to see if the BeCM has any input to the process and if the Australian programming of BeCMs disables the elements in a different way.

Are the HEVAC switches a mechanical toggle switch like the hazard lights or a momentary switch like the air distribution switches?

Does the heated seat switch retain its setting after removing the key?

When i turn the seat heaters on with the Faultmate, the relays sound like they are coming from the BECM.

[glenhendry]

Rave seems to be telling me that I need to earth wire 6 from Connector 1279 to turn on the drivers seat and earth wire 15 from the same connector for the passenger seat. After that it looks like the BeCM does the rest.

I will try this weekend. Anyone who wants to warn me of blowing stuff up, please do. Anyone who wants to confirm my wiring diagram readings, please do :)

[Junosi]

Are the HEVAC switches a mechanical toggle switch like the hazard lights or a momentary switch like the air distribution switches?

Here's a pic of mine - seat heater switches are bottom right and bottom left. Right seat is on, it's a momentary switch that makes the light on the switch light up and a solenoid under the seat clicks on.

[VladTepes]

Serves you right for owning a P38 rather than a PROPER RR.

My 1994 Classic RR (Vogue LSE) had seat warmers AND they worked.

[glenhendry]

Serves you right for owning a P38 rather than a PROPER RR. My 1994 Classic RR (Vogue LSE) had seat warmers AND they worked.

I'll ignore that, on this P38 forum ;) .

There is a problem, fuse 2 is missing from the BeCM, that means I may be missing more than just the switch on the HEVAC head unit. All the wiring cant be difficult to put back in though, if I am keen enough.

[daljames]

I'll ignore that, on this P38 forum ;) .

There is a problem, fuse 2 is missing from the BeCM, that means I may be missing more than just the switch on the HEVAC head unit. All the wiring cant be difficult to put back in though, if I am keen enough.

keep us informed!

[glenhendry]

I have just installed a HEVAC from UK with the heated seat buttons. The lights on the buttons work as expected, and I hear a click behind the dash. I also confirm that there is 13v going through the becm and into the connector under the seat. Since I get no heat, I assume that the seat element is broken. The summary is though, for HSEs at least, you can just plug in the HEVAC controller and you should be good.

[Hoges]

I have just installed a HEVAC from UK with the heated seat buttons. The lights on the buttons work as expected, and I hear a click behind the dash. I also confirm that there is 13v going through the becm and into the connector under the seat. Since I get no heat, I assume that the seat element is broken. The summary is though, for HSEs at least, you can just plug in the HEVAC controller and you should be good.

Can you test the seat element connector with a multimeter (resistance?)

I was glad to leave a "hot seat" when I finished full time work :angel::wasntme:

[Craig_Keira]

Any developments on this? I'd love to have working heated leather seats in Canberra - for those -10 winter mornings that are too cold to ride to work!

[DT-P38]

I have seen the elements for sale on ebay.co.uk at pretty reasonable prices.

Have also been guaranteed by Preferred workshop owner (who has wrecked heaps of P38's) that they are not in AUS spec cars.

Have never actually pulled a seat apart to check though.

[glenhendry]

Sorry, I updated the wrong thread a while back, here is the info (http://www.aulro.com/afvb/p38a-range-rover/142101-heated-seats.html#post1605287).

Ill summarise, I bought a HEVAC unit with heater switches. To my suprise, the switches work, and the BeCM understands it, and all the wiring is there, and 13v power gets to the seat wiring connectors, but the seats dont heat up. I suspect I have broken heating elements.

I intend to find the fault in the element and reconnect. I have yet to answer Hoges' good question and test the element for continuity. I will tonight/tomorrow. I am confident that it will work.

[DT-P38]

Cool!

Errrr... I mean warm?!?

[glenhendry]

Passenger seat heating element fixed. I pulled the seat out and pulled the seat cushion leather off. I found that the element was broken in two very specific places, where it goes under the metal rod (twice) that separates the front and rear sections of the seat cushion.

It is easy to test, there is a black and red wired connector going up into the seat from underneath. Test those two wires for continuity. If there is none, your element is broken. You can solder in a piece of wire to repair. the heating element is very small wire, and it is coated in a plastic insulator like a normal electrical wire. I am quite confident that I will be able to remove the drivers leather cushion cover without removing the seat from the car.

The Aust spec HSEs have all the wiring, fuses, seat elements, BECM internals you need - all you need is a HEVAC with the heating buttons.

[wayneg]

let us know how you get on with the drivers seat leather removal. I have the switches but neither seat works. If its an easy fix I might have a go as the weather is pretty cool at the mo, especially in the mornings

[Scouse]

My 'new' P38 has heated seats & a fuel burning heater.......warm seats & a heater that works from the start.....bring on winter !!!

[zachs_89]

When installing the uk control unit for the air
Con so you Have the heated seat buttons does this mean your read out is now in fahrenheit rather then Celsius???

[glenhendry]

No, its fine, its controlled by becm language setting.

[zachs_89]

No, its fine, its controlled by becm language setting.

Sweat as sounds like a good thing :-)

[FANTOM P38]

I've heard that there is several versions of hevac unit, so you need to get unit with same part no or will not work!! can anyone throw some light on this?
Seat heaters would be great in winter up in high country, but hevacs are not cheap & I would hate to buy wrong unit.
Martin

[Boblofty]

For information guys...heated seats in a late model P38 HSE 4.6 (build date Dec 2001).
I have just repaired my HEVAC display and lighting (fuse box problems - see Ron Becketts fix) and as part of the complete exercise, I replaced my existing working HEVAC with one from the USA for no other reason than it matched the existing woodgrain paneling in the car.
It came with the switches for both the heated seats and heated windscreen.
Obviously I don't have a heated windscreen BUT NOW I have heated seats.
Brilliant in Canberra.
So I can't speak for all late model P38's but in this case all that was required was the switches....nothing else...no relays, wiring...nothing.

Good luck.
Cheers Bob

[Ghind]

I believe there are different versions of the controller. I think I remember there being differences with the outside temp sensor and you need to have the right sensor to match the controller

I have a Jan 95 p38 and a 99 Bosch. Everything was fitted in the 95 and id even fitted a UK controller to it > 10 years ago. The passenger seat worked (but I didn't know because I never say in it to try) and the drivers seat worked except for the broken element. I bypassed the base and just had a heater back. It ran at 4 times the power (twice the colts, twice the amps) that it was supposed to and no thermostat. It gets so hot in 40 seconds you have to turn it off it it will burn you.

I haven't checked my 99 yet but I want heated seats badly in that! Ideally I could swap controllers. Must try and see what happens.

[Scouse]

I haven't checked my 99 yet but I want heated seats badly in that! Ideally I could swap controllers. Must try and see what happens.You'll lose some of the climate control operations. 'mechanic2you' did this recently on his '01 & lost the fans IIRC. It's wired differently due to the fusebox differences.

[Ghind]

Rave seems to be telling me that I need to earth wire 6 from Connector 1279 to turn on the drivers seat and earth wire 15 from the same connector for the passenger seat. After that it looks like the BeCM does the rest.

I will try this weekend. Anyone who wants to warn me of blowing stuff up, please do. Anyone who wants to confirm my wiring diagram readings, please do :)

@glenhendry how did this work for you and what year is the car. Gems/Thor.

[Eevo]

shouldnt there be an option in nanocom to test/turn on the heated seats?

or should i take off the control panel n look for something not plugged in?

[Keithy P38]

There is actually no on/off buttons for those who don't have them (even though the elements are there). To enable them you must have the HEVAC unit which allows them to be turned on, or you could just wire them up to your own switch...

[Eevo]

There is actually no on/off buttons for those who don't have them (even though the elements are there). To enable them you must have the HEVAC unit which allows them to be turned on, or you could just wire them up to your own switch...

yep, so i i take off the HEVAC faceplate, i should find two plugs???
if i buy a HEVAC faceplate with the buttons, i should be able to plug the two plugs in and have heated seats????????

[Keithy P38]

I'm not entirely sure if the non-heated HEVAC has plugs behind those blanks, or where it plugs into the loom. Someone else might be able to confirm!

Cheers
Keithy

[Eevo]

im going to have a look today,
if true, today will be the greatest day ever!

[Scouse]

im going to have a look today,
if true, today will be the greatest day ever!Really? I'm yet to use my heated seats, or windscreen.

[Eevo]

i got heated seats in the disco, they are awesome!

heated windscreen would be handy about 5 times each year.
better than sticking your head out the window trying to see

[p38arover]

i got heated seats in the disco, they are awesome!

heated windscreen would be handy about 5 times each year.
better than sticking your head out the window trying to see

Eevo, down on the bottom right of the HEVAC panel is a defrost button. Try it. It also demists the rear window and the outside mirrors. :twisted:

I don't need heated seats but I need new lambswool seat covers. I removed the driver's seat cover yesterday as it's worn out. I'd forgotten how sticky leather seats are one's bare legs and back

[Eevo]

Eevo, down on the bottom right of the HEVAC panel is a defrost button. Try it. It also demists the rear window and the outside mirrors. :twisted:

I don't need heated seats but I need new lambswool seat covers. I removed the driver's seat cover yesterday as it's worn out.

demisting wont remove a small build up of ice on the outside
where as a heated windscreen will





I'd forgotten how sticky leather seats are one's bare legs and back
you should try having a shower once in a while :twisted:

[p38arover]

Ice? Shower? What are they?

[bee utey]

Ice? Shower? What are they?
Both involve umbrellas, some shoved into drinks and some held up outside.:cool: