Technical Wiring remote locking

Currently reading:
Technical Wiring remote locking

Joined
Feb 17, 2014
Messages
804
Points
247
Location
Cannock, Staffordshire
Hi can anyone help me, my remote locking kit has arrived today but I'm struggling on how to connect it :/

I've attached photos of the diagram that was in the manual

Thanks in advance I have looked through the guides but it still hasn't helped
 

Attachments

  • WP_20140807_001.jpg
    WP_20140807_001.jpg
    1.3 MB · Views: 140
  • WP_20140807_002.jpg
    WP_20140807_002.jpg
    1.4 MB · Views: 74
post 4

look at negative trigger diagram

guides didnt help you, cuz every remote locking kit got different wire colors

just find out which wire is for what on your kit, that shoud be in instructions and then look at the link i gave above where to connect those wires, disconnect battery first
 
brown to pink for indicators to flash when locking/unlocking

I'd be really wary of doing this... -- it can wreak havoc with the canbus system.... :nono:

I just rely on the fact that my interior light comes on (LEDs: so quite bright!) when I unlock the car.... I believe s and b has experimented with orange LEDs wired in separately in the light clusters, though.... :cool:
 
I'd be really wary of doing this... -- it can wreak havoc with the canbus system.... :nono:

I just rely on the fact that my interior light comes on (LEDs: so quite bright!) when I unlock the car.... I believe s and b has experimented with orange LEDs wired in separately in the light clusters, though.... :cool:

Do I have to connect it to the indicators? And on my diagram in my user manual why is there 3 12v cables?
 
I'd be really wary of doing this... -- it can wreak havoc with the canbus system.... :nono:

I just rely on the fact that my interior light comes on (LEDs: so quite bright!) when I unlock the car.... I believe @s and b has experimented with orange LEDs wired in separately in the light clusters, though.... :cool:

i heard that it can destroy canbus, but how? proof?
 
Do I have to connect it to the indicators? And on my diagram in my user manual why is there 3 12v cables?

You don't have to connect it to the indicators... -- in fact, as I said, I wouldn't, and didn't...! :)

It's so long since I fitted mine, that I don't know the answer to the second question. Sorry. flisko might be able to help, here.... :eek:

i heard that it can destroy canbus, but how? proof?

Putting 12v through a system that uses lower voltages; and sending a signal to the body computer that makes no sense to it. [The home/work equivalent would be wiring up your ethernet network -- for those of that still use such things... -- to the mains; or expecting a 5v USB system to cope with something of higher voltage (e.g. a car battery...).] :nono:

For proof, you'll have to wait until s and b returns...! ;)
 
Putting 12v through a system that uses lower voltages; and sending a signal to the body computer that makes no sense to it.

Fitting one of these kits should do no such thing. It takes control of the indicators directly. The body computer switches with a transistor of some variety, unless there's a relay tucked inside it. These will not be harmed by having the lights turned on past them. It's not being sent any signals.

A universal kit would never connect to CANBUS: It can't know all the protocols.
 
Fitting one of these kits should do no such thing. It takes control of the indicators directly. The body computer switches with a transistor of some variety, unless there's a relay tucked inside it. These will not be harmed by having the lights turned on past them. It's not being sent any signals.

A universal kit would never connect to CANBUS: It can't know all the protocols.

I didn't say it would.... :rolleyes:
s and b works on Puntos every day -- and has warned about this again and again and again. It's why I didn't wire my indicators to flash. :worship:

I'm just not sure how the new central locking system can "take control of the indicators directly", without this affecting the BSI: which, as I understand it (and I'm not saying I've got it right...) normally controls them.... :confused:
 
  • Like
Reactions: YST
I didn't say it would.... :rolleyes:
Well, actually, you suggested it would.. and I suggested it wouldn't.

@s and b works on Puntos every day -- and has warned about this again and again and again. It's why I didn't wire my indicators to flash. :worship:

I'm just not sure how the new central locking system can "take control of the indicators directly", without this affecting the BSI: which, as I understand it (and I'm not saying I've got it right...) normally controls them.... :confused:
Check on a wiring diagram. The indicator lamps each have one dedicated wire coming from the internal fuse box, and one wire permanently connected to ground. This is thusly high side switched. It could be a relay or a direct high-side transistor drive, I'm not sure which, honestly. If you connect a remote locking unit to the harness beyond this point, you are simply bypassing the switch in the body computer, and supplying the lamp. No harm should come to it from this unless something very strange has been done in this rudimentary circuit.

CANBUS is never in any way involved in such methods, it cannot come to harm. In fact, in a Mk2 Punto, CANBUS is never involved in any of the indicator circuits, so far as I can tell. It may be possible to command the indicators over CANBUS, but that's not how the main stalk or hazards work.

If anyone happens to have a dead one, it'd be very interesting to dissect. Alas, I like mine intact and working.
 
Last edited:
On the early punto's adding extra's wouidnt matter much,
On the later ones..say 2001 onwards it does..
They've become more multiplexed...so any changes to the cars electrical system can and will cause conflict...

Iwouidnt take any gambles on wiring anything in without doing research first or if you have limited experience with electrics seek advice from a Auto spark..

Please be careful what advice you give here at the end of the day someone's pride and joy couid end up scrap iron.
 
On the early punto's adding extra's wouidnt matter much,
On the later ones..say 2001 onwards it does..
They've become more multiplexed...so any changes to the cars electrical system can and will cause conflict...

The teeny bit of capacitance is not going to harm much, it won't see much else. Again, rudimentary circuit, high-side relay or transistor switched with, I assume, a simple resistor for current sensing. It's really nothing special, it's just that people tend to think of cars as contained explosions with wheels, electronics from the 60s are still considered whizbang by some.

Iwouidnt take any gambles on wiring anything in without doing research first or if you have limited experience with electrics seek advice from a Auto spark..

Please be careful what advice you give here at the end of the day someone's pride and joy couid end up scrap iron.
I agree, don't plow in. You'll have a really bad day if you wire up this nice, active low system (which, from reading another post, seems to take the internal +3.3V supply out on the harness towards the doors.. bad idea much? I may have a probe and see if it's really doing that when the sun is up) with a +12V active high by mistake. I haven't given any advice to go ahead and connect up the indicators, I'm simply discussing the issue. I would actually like to tear in and see the reality of the switching arrangement in there, but I doubt there'll be anything but a relay or transistor, with a current sense resistor.
 
Last edited:
I'm simply discussing the issue. I would actually like to tear in and see the reality of the switching arrangement in there, but I doubt there'll be anything but a relay or transistor, with a current sense resistor.

^ fair enough,

FWIW. ive just tried taking apart a bcu,
for whats inside it wouid be a bit of a challenge to work out whats what,
its more or less just a bigger version of modern mobile phone circuit board,


anyhow after 5 mins ilost interest,. :(
 
FWIW. ive just tried taking apart a bcu,
for whats inside it wouid be a bit of a challenge to work out whats what,
its more or less just a bigger version of modern mobile phone circuit board,


anyhow after 5 mins ilost interest,. :(

That's pretty normal sort of stuff for me.. Some photos, perhaps?
 
Hi,

Ok guys, so from my personal experience, I have never seen an aftermarket alarm/ RCL that has been wired CORRECTLY into the harness for the indicators cause an issue with the BCU.

People get confused with what the "CAN" system actually is/ does.

The Pink and Pink and white wires that have been discussed here are not ON the CAN system, yes they are MONITORED by it but they do not carry CAN messages or CAN signal. If a fault is detected by BCU ie "open circuit" (blown bulb or 5w bulb fitted instead of a 10w) or "short Citcuit" (21w bulb fitted instead of a 5 or wiring fault) then that fault would be transmited VIA the CAN network to trigger the bulb warning light, and provide one of the above fault codes for examiner to read.

The indicators are indeed switched by relays, but not your standard relay, instead relays incorporated into the BCU. Thus, when the alarm/ RCL system sends a +12v pulse down the high side (output) side of the relay, technically there should be no feed back into the CAN side of the BCU. Fiat technical state that the outputs are "protected" against static discharge, RF interference etc etc.

I have connected many kits to the indicators (including on my own cars) and indeed when I have seen professional alarm companies installing them, they too connect them.

As its a contentious subject, Im not going to say its FINE to connect them, merely state my experience with it and my experience with the CAN network on these puntos.

If you were to wire them incorrectly however, or your RCL kit was dodgy you could potentially damage the relay incorporated in to the BCU.

Alan
 
Back
Top