Automatic door-lock/unlock
CX-9 /2007 Version 1.0
Page 7
4.
Building
I have built the circuit directly on and around the relays. I first glued the relays together (super glue / 10
seconds glue) in a way that it still would fit in the plastic box.
I applied red wire for 12V, black for MIN/ground around the relays. Grey for the all the door-lock signals
and white for all the parking-brake signals. This makes it easier to diagnose later instead of or wires
having one color and when you connect wires of a different color on the same contact…..get concerned.
With a little bit of patience and good looking & checking it was an easy job in 1 hour and performed the
in-house test (chapter 5). I used a battery charger for the 12V.
I have drilled a hole in the plastic box to let the wires out and put the relays in the box, while pulling the
4 wires through the hole & put a wire tie around the wires to as stop to prevent them being pulled
completely.
I secured the relays in the box with thick paper on top and aside. I did not glue as I might need to
remove them from the plastic box to troubleshoot more later on (which I had to….)
Before closing the box I included a copy of circuit (printed Appendix- A) for future reference. That is a
good habit in case of problems in the future and you can’t find THIS document.
