Parking brake and reverse light on aftermarket stereo

Gigabit

Member
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Mazda2
I've got a Mazda2 2008 (UK) and I've installed an aftermarket head unit (Pioneer F88DAB).

I'm using a Connects2 CTSMZ002.2 to retain the OEM remote and a CTPIONEERLEAD patch lead.

It's all working but the stereo doesn't detect the handbrake is on or off, nor when the car is in reverse. It gets the speed correctly however.

The patch lead has connections for the handbrake and reverse light and even though I've connected these, it's still not working. Looking at the OEM harness, it would appear the wires for the handbrake and reverse light aren't in the harness - where are they?
 
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