Flasher clicker too quiet?

Moz1000

Member
Messages
820
For some of us, the flasher (turn signal) clicker is a little too quiet, and can result in the indicator being left on following a turn that isn’t enough to engage the auto-cancelling feature. I for one have been caught posing around in Sport mode with the music blaring only to find my indicator has been on for the last x miles. How embarrassing.

To get at the clicker in order to make it louder, you have to remove the dash and instrument binnacle which is not easy, and beyond many.

So here’s a cheap and reasonably easy solution that I’ve implemented on my Granturismo S MC-Shift. The process is described below and should be similar for the QPs and the 4200, 3200 and GS cars if necessary.

This solution uses a sounder module that is primarily intended for installing on a motorbike where leaving the indicators on could have serious consequences. There are various versions available, but the one I chose comprises a single piezo sounder complete with built-in drive circuit which is wired in parallel with the rear flasher lights. A couple of diodes in the wiring allow the unit to be connected to both left and right flasher lights so the sounder sounds whenever either flasher is operated.

This is the Ebay link to the one I bought. https://www.ebay.co.uk/itm/251555295221 £4.30 delivered uk. This is what you get.

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The simplest mounting location is in the boot, with the connections made to the rear light clusters. The sounder emits at ~95dBA so is quite loud. However I wanted to ensure I could hear it in the cabin over the hifi and exhaust (and the wife). There’s a location just under the rear parcel shelf where the cabin vents to the boot. Perfect for the sounder location.

First thing I did was extend the red wires and add a ring terminal to the black wire. I didn’t have any suitable red wire so used brown mains wire soldered and insulated with heat-shrink sleeving.

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Next remove the boot linings. On the Granturismo it is simple when done in the correct order, and only requires a cross-head pozi screw driver, an Allan key, 6mm I think, and a small flat blade screwdriver. Order of removal: base cover, storage compartment (2 screws), battery cover (2 screws), rear-most face ( 4 screws using the flat-blade to pop-off the dome screw covers), lower side covers (2 hex sockets each side taking care to ensure you retrieve the spacers under each), rear quarter covers (1 screw each with dome covers disconnecting the 12v socket on the nearside one and retrieving the internal fixings if fitted), forward-most cover (4 plastic push-in fixings) and then the cover under the parcel shelf (2 screws with dome covers disconnecting the courtesy lamp). Some images:

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When all the covers are out you will see the plugs to each light cluster:

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The wire you’re going to connect each red wire to is the pink one (on the Granturismo, for other models you’ll have to connect a voltmeter and see which wire shows volts when the indicators are switched on).

....to be continued
 

Moz1000

Member
Messages
820
Look under the parcel shelf and you’ll see an opening. This is where I stuck the sounder after attaching a couple of double-sided pads (included in the kit).

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Stick the sounder inside the cavity. This is where the cabin air exits to the boot, so the sound will be heard in the cabin.
Now you can route the wiring back to the rear light clusters, using cable ties to fix it as you go.

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Then use the Scotch-blocks to connect the sounder wires to the pink wires close to the light cluster connector each side.

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The black wire needs to connect to the chassis and I used a bolt at the bottom of the fuel tank cover:

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Now test it. Left indicator, right indicator and hazard switch. All should operate the sounder.
Then tidy any loose wires, and put the covers back on: Under the parcel shelf (remembering to reconnect the courtesy light connector), then the foreward-most panel, and so on.
Here’s a video of what to expect. Sounds like a reversing sounder on a lorry but does the job.


Hope this is of some use!
Moz
 

conaero

Forum Owner
Messages
34,594
Very smart, that would drive me crazy but I get where you’re coming from.

Benny, 4200 Spyder, did the same but put a red light ontop of the steering cowling to give a visual rather than audible alert.
 
Last edited:

CatmanV2

Member
Messages
48,557
Nice write up. Not something I'd want to do but if you're going to do it.

One thing I'd be a little worried about is the sticky pads. You'd hate it if it came loose due to repeated heating and cooling cycles. 3M VHB for the win

C