Aftermarket central locking / Hazard warming flash

[DizzyDalek]

Hi All,

Encountered an issue that has me scratching my head. I've installed an aftermarket central locking system onto my Z3, and it works great. In order to make it look a bit more professional I've been playing with getting the hazard warning lights to flash the the car is locked / unlocked. I couldn't see an obvious handy wire to splice into on the wiring diagram so decided to do it via the hazard warning switch.

The CL module has a wire that pulses 12v when the locking is activated. Now removing the hazard switch and checking what's what with a meter shows that there is 12v on pin 2 and if I short this to pin 5 the hazard lights flash properly.

So 12v to pin 5 works.

But.

If I connect the 12v from the central locking to pin 5 on the hazard warning connector only the passenger side indicators flash.

(If you connect it to pin 4 you get the console lights to flash.. funky)
(If you connect it to pin 3 you get a spark and a blown fuse )

Any thoughts? I know this is a bit of a workaround, but it should be simple. Is there another wire off the ZKE that goes to the hazard flasher?

Next up.. getting the automatic window close thing to work.

Cheers

Iain

 

[mrscalex]

I don't know the answer. But proceed with caution.

I believe the central locking is unlocked when a crash is detected - so you can get out more easily. Along with many other things like firing the seatbelt pre-tensioners, airbags & blow-off for the main supply on the battery, also turning on the hazard warning lights. I can't remember if this is done from the ZKE only or it works in conjunction with the airbag or crash detection module.

But if you are replacing the factory central locking (how come btw?) you may want to consider this.

Anyhow, just saying in case you inadvertently compromise your safety.

 

[DizzyDalek]

My car came with 2 keys but no fobs and this seemed a reasonable price / functionality compromise, especially as it can be easily removed if / when I get the original fobs.

The way it's done *shouldn't* effect any of the crash stuff. The central locking still works via the key in the lock, the new module has a pass through.

I'm not in a hurry to find out

That's why I wanted to go via the hazard switch and not the wire from the crash module.

Relay on order which will let me emulate the hazard switch functionality and will hopefully solve the problem.. that isn't that much of a problem.

 

[Chaz Ricorn]

Not had any experience with doing this on a Z, but done others, there should be a sepearete feed from the hazards to each side which you can tap into, however you do need isolate these by using diode to stop triggering them all when you indicate left or right.

 

[ktnez99]

I know nothing about bypassing the central locking and installing another system. I do know, however, that if I turn a key in my Z, whilst the central locking will engage, the factory fitted alarm doesn’t. Something you might want to consider. Might a full set of replacement car keys programmed to activate the existing central locking system and the manufacturer’s fitted alarm be a good idea?

 

[colb]

I expect you know that if you use the key in the drivers door and lock the car then keep the key turned to the lock position any of the windows that are open will close automaticaly. I presume the body module gets a signal from holding the key in the lock position and triggers the windows to close.

 

[TrevD66]

@colb ... Thanks for that info re locking and the windows closing. I was not aware of that but will try it tonight when I get home.

 

[gookah]

you wont find a suitable location on the Hazard light switch to connect in to.
The best place is via the flasher relay, or break into the wiring loom where it runs from front to rear to supply the rear indicators
If you can find the blue wire with a green stripe that is the L/H indicator, and the blue wire with a brown stripe is the R/H indicator. You may need to fit some diodes though, to keep the two circuits separated

I am not sure which side of the car they run though.


With regards to the windows roll up, you can do this at the ZKE module behind the glove box
You have to apply +12v to the Red/White wire (terminal 13 on the X13253) Purple plug.
This is also where the +12v signal ends up from the door lock actuator switches (inside either door), when holding key in lock position to close windows.
If your alarm gives a pulse output then you would need to fit a hold-on timer to maintain the signal, because this voltage has to be applied for the duration of the movement just as you would hold the key in that position
It does not matter if it is a little longer as the ZKE gets feedback from the window encoders that movement has stopped and it then cuts the output to the windows.
Timer is not required if your fob gives the output for as long as you hold it on.

 

[DizzyDalek]

Thanks, that makes sense

Looking at the hazard warning switch wiring, it has 4 pins. One is ground, one goes to the flasher unit, one is for the illumination and the other is power. If I short "flasher" and "power" the hazard lights work (obvs, that's what the switch does) so I'm flummoxed as to why the 12v from the CL unit doesn't have the same effect.

Ordered the bits to make a holdover relay, theoretically if I fit that across the hazard switch pins (2 and 5) it'll work.

Find out this weekend.

 

[Bryn69]

Hi All,

Encountered an issue that has me scratching my head. I've installed an aftermarket central locking system onto my Z3, and it works great. In order to make it look a bit more professional I've been playing with getting the hazard warning lights to flash the the car is locked / unlocked. I couldn't see an obvious handy wire to splice into on the wiring diagram so decided to do it via the hazard warning switch.

The CL module has a wire that pulses 12v when the locking is activated. Now removing the hazard switch and checking what's what with a meter shows that there is 12v on pin 2 and if I short this to pin 5 the hazard lights flash properly.

So 12v to pin 5 works.

But.

If I connect the 12v from the central locking to pin 5 on the hazard warning connector only the passenger side indicators flash.

(If you connect it to pin 4 you get the console lights to flash.. funky)
(If you connect it to pin 3 you get a spark and a blown fuse )

Any thoughts? I know this is a bit of a workaround, but it should be simple. Is there another wire off the ZKE that goes to the hazard flasher?

Next up.. getting the automatic window close thing to work.

Cheers

Iain

Hi Dizzy I also want to fit after market central locking, do you know the pin outs for the locking and things, I have unplugged to old alarm box, thanks