OBC and outside temp sensor retrofit.

[Dan in NZ]

I have had an obc for ages, planning to do the retrofit from the analogue clock. I've checked it out and I have everything I need, just waiting to find an indicator with obc button on the end.

I ASSUME I don't have an outside temp sensor as I only had the analogue clock to begin with, is it hard to add one of these? Having not looked at a temp sensor, I would guess the sensor just gets one wire to 12v, then the other to the correct pin in the obc connector. Does the cars wiring harness have a plug for the temp sensor, or would I have to route the wire ll the way back to the obc? (!)

Also if anyone has tackled the obc retrofit, some tips and advice would be greatly appreciated.

[Giles]

I have had an obc for ages, planning to do the retrofit from the analogue clock. I've checked it out and I have everything I need, just waiting to find an indicator with obc button on the end.

I ASSUME I don't have an outside temp sensor as I only had the analogue clock to begin with, is it hard to add one of these? Having not looked at a temp sensor, I would guess the sensor just gets one wire to 12v, then the other to the correct pin in the obc connector. Does the cars wiring harness have a plug for the temp sensor, or would I have to route the wire ll the way back to the obc? (!)

Also if anyone has tackled the obc retrofit, some tips and advice would be greatly appreciated.

Dan,

I did this last year on my car (94 525). My car DID NOT have the wiring in place for the temp sensor...So I ran a wires from the OBC to the front of the car...It's a pain, but if you are careful you can make a nice job of it. You will also have to run wires for Stalk (easy'ish job)...Oh yeah from what i remember the of the two wires for the temp one is gorund the other is from the OBC. Hope this Helps. I did not have the bracket for the OBC itself so hacked the hell out of the old one and it looks pretty good.

Giles

[Unregistered]

I did this fit too, but my wiring was in place, although i should point out i looked for about 30 mins and gave up and was told 'you arent looking properly'! so i looked again and there it was, tied back about 1 metre away from the mounting hole.

[Dan in NZ]

I did this fit too, but my wiring was in place, although i should point out i looked for about 30 mins and gave up and was told 'you arent looking properly'! so i looked again and there it was, tied back about 1 metre away from the mounting hole.

Was that the wire for the temp sensor, or the indicator stalk? One meter in which direction???

[Dan in NZ]

Dan,

I did this last year on my car (94 525). My car DID NOT have the wiring in place for the temp sensor...So I ran a wires from the OBC to the front of the car...It's a pain, but if you are careful you can make a nice job of it.

Giles

Thanks for that,
Where did you manage to get the wires through the firewall? I would imagine that's the hard part, once it's in the engine bay I guess I would just run it around the edge of the engine bay and down to the bumper. It seems some already have the wiring, so I'll hope for that first!

[Unregistered]

Thanks for that,
Where did you manage to get the wires through the firewall? I would imagine that's the hard part, once it's in the engine bay I guess I would just run it around the edge of the engine bay and down to the bumper. It seems some already have the wiring, so I'll hope for that first!

I just followed the path that my alarm wiring went (not BMW alarm) I've no idea why some car's did not have the wiring in place, maybe it's a UK thing, hepefuly yours will be there!!

All the best,

Giles

[Dan in NZ]

I just followed the path that my alarm wiring went (not BMW alarm) I've no idea why some car's did not have the wiring in place, maybe it's a UK thing, hepefuly yours will be there!!

All the best,

Giles

My car was imported from Japan.. so it's specs are all weired, like no smilie lights for example, I better start looking...