Join Date: Aug 2006
Location: Chesapeake, VA, USA
Centech AP1 Installation
This is a follow-up to my previous thread on a Centech AP1 and Touratech TPS 15 install to power a GPS, Motolights and Stebel air horn (I also installed a BMW add-on LED tail/brake light while I was doing everything else).
Based on some advice from Meese, Semper Fi and others (thanks guys) I decided to only use the Centech and not use the TPS 15. The next thing I had to decide was where to install the Centech. My goal was to locate the Centech in such a way as to have easy access similar to a normal fuse panel. This way I can get to the fuses should I need to replace one or add or change any of my accessory items. I already had most of the skin removed for the Stebel horm and Motolight install anyway and because I was installing the LED tail/brake light I went ahead and stripped off the tail section.
Let's start with the LED tail/light. I removed the tail light assembly and drilled through the left rear corner of the plastic box for connector to pass through. I then drilled a hole through the top left corner of the fender behind the license plate mount. You'll need to cut a corresponding notch in the adjustable mud flap to clear the wiring with the flap is all the way up. My notch ended up being bigger than the one in the picture when finished. The connector is large so you want it to lay flat and not stress the wiring when everything is assembled. When the tail assembly is mounted there's a small gap between the rear of the box and tail section. Make sure that the wire coming through the corner of the box is pushed towards the center into this gap so it won't get pinched. Connect the piggy back connector to the tail/brake light bulb socket and run the factory wiring along the left side of the frame down to the accessory power socket and plug it in. Done.
Now for the Centech AP1. I decided to mount the AP1 under the rear seat. I centered the AP1 in the box for the bike alarm system and drilled a hole through the circuit board for a mounting screw. Next I used as drill bit the same diameter as drilled as the mounting holes two holes in the other end of the AP1 and drilled through the fender. I then used two screws, washers and nuts to finish mounting the AP1. I purchase the 70 amp relay with the AP1 so I mounted it to the tail section cross brace. Now for the power. I ran the battery + wire from the relay to the alternator avoiding a trip all the way to the positive side of the battery. I spliced into the LED wiring close to the relay and connected the key switch wire to the relay. The ground side of the relay goes to the AP1 (so far the only thing that is grounded through the AP1). Because of the way I mounted the AP1 to the fender I ran the ground and 12 volt positive (load) wires through the AP1 to the terminal lugs. This may be a little trickly but completely doable. The ground wire from the AP1 is connected to one of the bolts holding the left side hand rail.
I then made my own wiring harness with two 14 gauge wires for the 20 amp circuits and 5 16 gauge wires for everything else. This harness is install along side the OEM harness along the left frame to the front of the air box. After connecting the Stebel horn, GPS and Motolights, I have three extra power supply connections left for future use. All of the ground wires for the extras and the relays are attached to one of the ABS mounting plate bolts (sorry, no picture) eliminating the need to run anything of the grounds to the AP1 or battery.
After getting the bike reassembled, the last thing I did was attach the Motolight on/off switch to the left side trim panel in the fairing. Everything is hidden and looks factory installed (ok, maybe not) and the battery box doesn't have anything in it but the battery. It took a good part of two weekends to figure this out and get it finished but to me it was worth it.
The Stebel horn kicks &*^% and the extra visibility from the Motolights and LED tail/brake are well worth it.
I hope this information is of use.
Last edited by John06KGT; Oct 4th, 2009 at 8:03 pm.