Another quick'n'easy mod here.

UK Jazzes don't have alarms (even as optional extras) but they "act" like they're alarmed (e.g. flashing the indicators on lock/unlock). Well, I thought just to put a finishing touch in, I'd add a cheap fake flashing LED.
These come for a couple of quid off ebay all prewired and simply require connecting to the correct wires.

It works by connecting the positive lead to permanent (battery) positive, and connecting the negative lead to Accessory (Ignition) positive. This way, when the car is off, ACC+ is not live but PERM+ is so current flows and the LED flashes. When you sit in the car and switch on, ACC+ now becomes live but so is PERM+ so no current flows so the LED turns off.

The problem arises in that some circuits will now "go live" when you turn the ignition off as they're receiving a positive via the LED you've attached into their circuit (so when I tried connecting it to ACC+ fuse, the radio turned on....same as when I used Cigarette Lighter fuse). Alternatively, other circuits may confuse the ECU and result in Power Steering to switch off (e.g. using the rear wiper motor fuse).

So I ended up using an existing fuse for PERM+ (one that was already live on the multimeter whether ignition was on or not, the wire on the right), but for ACC+ I bought a spare 7.5A fuse and added it into a circuit that wasn't there ----- my Jazz doesn't have daytime running lights, so I simply "used" that unused circuit that has ACC+ power but isn't wired up to anything (the wire on the left of this picture):


The way I did it was to "curl" the bare wire end around the right hand blade of the micro fuse. This way, the LED is actually protected by that fuse (it's on the right side of the blade), but more importantly, it is very secure (fuse blade fits very tightly when there's a wire along it) and I haven't cut into anything and risked ruining wiring looms. Plus, if I want to remove it at some point in the future, I simply get a blanking plate from ebay for a couple of quid, and take the wire out from the fuses (remove fuse, unwrap wire, replace fuse)....so it is easily reversible and hasn't caused permanent changes to the electrics.

Wired into blanking plate:


The blanking plate is the only thing unused in my Jazz (I think it's where the comfort lighting switch would otherwise sit) so wiring it in here meant that it was a) near the fuse box and b) looks fairly "stock" (plus, as mentioned above, it's easy to reverse by putting a new blanking plate in).

Clear LED in discrete housing with ignition on.



When Flashing (ignition off):



It's nice and bright, but the only problem I have with it is that it flashes at about 2Hz, and I would've preferred something more along the lines of 1Hz, but it'll do for the time being .

 

cool little setup you got there.

 

Pretty neat! Thanks for sharing.

 

Thanks . The Jazz has an "old person" image here in the UK so I doubt very much someone would try and break in to steal it, but I thought this might add a little deterrent for very little cost anyway.