Would rather be riding
Join Date: Sep 2007
Location: Mountain View, CA, USA
Accessory relay - what'd I do wrong?
I set out today to install several things:
1) 2nd accessory outlet on the lower left side direct to battery (no relay)
2) power to autocom under the passenger's seat (switched)
3) power to 2 cigarette lighter adapters in the smuggler trunk (switched)
I decided to use the power to the Nav III as the switch for the relay, so the accessories would stay on for a bit after turning off the bike.
The problem is, now the accessories and the Nav III itself all stay on!
Here's the setup:
1) ground wire from battery to various things under the seat.
2) +12v through a fuse by the battery and back to things under the seat
3) +12v switched tapped into GPS accessory connector.
Connected to the relay (standard 30amp automotive SPST) I have:
2) +12v switched from GPS to "switch" (opposite ground)
3) +12v from battery to 12V in
4) output of relay to accessories.
If I start with everything off, when I turn on the bike I hear the relay "click" and the accessories come on. So far so good.
When I turn of the bike however, the GPS and accessories stay on!
If I disconnect the GPS line from the relay, the accessories go off immediately, and about a minute late the GPS itself goes off.
So it seems like somehow the extra load from the relay is (somehow) causing the Can-BUS to keep the GPS powered! Dammit, that's not what I want!!
I guess I should find another switched source of power for the relay. I considered using the accessory outlet that was there to start with, but I've got the fancy Can-BUS charger and I was worried that if I used it then the autocom and other stuff would also stay powered while the battery charger was hooked up.
Is there another readily accessible source of switched power under the seat? I don't care that much if it goes off immediately when I shut off the bike, I just want it to go off!