help/ advice required please!

[donjack]

good morning guys, i have a little problem that requires your help.
i bought one of these:-

http://www.tomtop.com/steelmate-diy-tp90-tpms-for-motorcycle-tire-pressure-monitoring-system-with-waterproof-external-sensor-wireless-lcd-display-k2597.html

i thought it would be a simple install because there is only 2 wires, black= (ground/ earth) and red= (live) now, the problem i have is that it has to be switched on with the ignition!
ground, i understand can be attached to the frame anywhere but the live wire i'm at a loss with!! i have a wiring diagram in front of me but it may as well be a plate of spagetti!! i thought ALL live wires would be RED for some reason, silly me!!
anyhow, thanks in advance for your input, replies and help
cheers,
Don.

[CROSSBOLT]

I will let you know when I get mine installed! I think I am getting one for Valentine's Day......

Karl

[de dee]

Don look in the glove box that original wiring is hooked to the Ign., and so is the headlights,     

                  Don Goulet   300i Downtown  2011

[pipster326]

I have a wall mounted TPMS w/ programmable valve stems on my DT 300 , it works well, when it's parked in the garage. Not much help when your out on the road [emoji16]


Sent from my iPad using Tapatalk

[donjack]

Hey guys, thanks for your help, after much thinking and head scratching I decided to do exactly like de Dee suggested and it works perfectly!!
Haven't had time to do a comparison with an ordinary tyre pressure gauge yet, but from memory the last time I checked they were both about right.
I'll let you know how it goes