retro fit heated mirrors

[Sol]

Well I updated mine to 7.62 but it's crap, much harder to navigate, looks nicer but the navigation menus are really cumbersome so I'm going to roll mine back to 7.58 as it was fine. I'll let you know.

[Zen_Speedmaster]

Hello again, I went digging to try and find out why the heated mirror plug at the wing mirror bolt on point was not getting voltage.

The door loom enters the van and goes under the flooring in the footwell. This is the passenger side only I am talking about so far. I took out the pax and middle seat and lifted up the floor to chase the wires. I discovered that the red wire that powers the heated mirror through terminal 1 on the brown plug inside the door at the mirror bolt on point did not make it into the van. I know it is the red wire at terminal 1 because my buddy has heated mirrors on his van and I checked it out there.

This lead me to remove the pax door card and count all the wires in the loom. There were 18 which added up with the wires in the speaker, central locking, electric mirror adjustment and electric mirror heating/folding plugs. However, there weren't 18 wires making it into the van but it wasn't obvious where they were lost. After much more chasing I discovered that there is an electrical plug just inside the pillar on which the door hinges swing and the door loom plugs into this.

The 18 wires of the door loom are terminated in the door side of this plug but alas after a lot of fiddly and awkward continuity testing and simple wire counting I learned that the wires for the mirror heating and folding do not continue on from that plug and into the bsi. So it seems that there is a common door loom but that the van loom it plugs into is not actually common and they have left the mirror heating and folding wires out.

I removed the mirror heating wire from the plug, snipped off the pin and crimped a spade connector onto it instead.
I then took some red wire from my tool box and crimped the appropriate spade connector to that and joined the two. I fed the new red wire into the van via the grommet for the existing door loom. So now I have a wire going from the heated mirror door plug to the passenger footwell. I will do the same from the drivers side.

Considering that when I press the heated mirror button on the dash, I can hear the relay clicking in the bsi and then power appears at the heated mirrors fuse, I am assuming that one (or two for two mirrors) of the blank ports in one of the bsi plugs will become live too and this is where the heated mirror supply would normally come from.

I will try to figure out which bsi plug supplies the heated mirrors and see if I can connect into it.

[Zen_Speedmaster]

OK so I made an error. The fuse is before the relay in that circuit which means that when the engine is running the fuse has voltage at it. This scuppers my plan of piggybacking off this fuse to power the heated mirrors.

Which leads to an important point I think **The engine must be running for the heated mirrors to work!!** Testing with the ignition on won't do it.

I'll try to figure out which bsi plug the heated mirrors would usually be connected to and see if I can connect to that.

Anybody have a diagram of the bsi and bsi plugs?

[Zen_Speedmaster]

Eureka! I found the plug that supplies the heated mirrors. It is a black plug marked PH1. Terminals 1 and 9 which are the bottom 2 terminals as you look at it plugged into your bsi. I now have a toasty passenger's side mirror and will soon have the same on the driver's side. Nice to have that one put to bed! Now to rebuild my dismantled van ?

[Sol]

Well done that man.

[Anton61]

Eureka! I found the plug that supplies the heated mirrors. It is a black plug marked PH1. Terminals 1 and 9 which are the bottom 2 terminals as you look at it plugged into your bsi. I now have a toasty passenger's side mirror and will soon have the same on the driver's side. Nice to have that one put to bed! Now to rebuild my dismantled van ?

Hi Zen_Speedmaster
How did you connect the wires into the plug?

[alwaysanengineer]

Slightly side topic, but i was trying to figure out if I had heated mirrors on my 2018 Berlingo Multispace Feel. It is fairly basic, but it does have the electric adjustment of the mirrors. I disconnected the brown plug today at the top of the door, and tested the voltage on the two black wires. It turns out that it is running 4.9v on the black wires (which I though were for heated mirrors) These are the two middle pins in the bank of six. It now appears that my Tyre pressure monitoring is now putting up fault messages. I have not as yet removed the mirror glass, but I am starting to wonder if the TPMS receiver is located in the mirror? Pressing my heated window/mirror switch with vehicle running made no difference to the voltage. It just remained at 4.9v. Any ideas?

[Sol]

Nope, unlikely to be connected. You probably have a flat tyre. The TPMS if fitted, is on each tyre valve, and nothing to do with the mirrors. Electric adjustment mirrors does not mean they are heated either. The heater wires are brown. Black ones are the outside temp sensor wires.

[swawp]

Morning all, i am v new to the ownership of a berlingo van, i have just bought a berlingo enterprise van 2013 and would like to retrofit heated mirrors. This info is brilliant but i hv a couple of questions from reading it. 1. am i correct in thinking that once the switch is adjusted to work then all that is needed is to run wires to the door pillar from the pins 1 and 9 highlighted earlier and 2. are pins 1 and 9 both positive or is one negative and you will need to split the output from these to account for both mirrors?

thankyou in advance if anyone knows