Automatic door-lock/unlock
CX-9 /2007 Version 1.0
Page 8
5.
In-house test
Actually before you install in the car, do a test on your table with a 12V supply. It can save you a lot of
trouble, not only because you will have to try to fix the problem sitting in an uncomfortable positioning
next to the car while it is cold or raining, but also make sure the basics are working and not blowing up
fuses in the car. Let alone it will save you the “supporting” remarks from your significant other and that
by itself is worth more than anything else.
Connect the black-wire to the MIN. Hold grey and white wire separate. Connect the red-wire to the
+12V. Don’t expect fireworks…. it is only 12V and if you see sparks…. get a rest or check the circuit.
click-clack
Hurray … The relays have come alive! That is good news. No click-clack…. no 12 volt….fix it first!
First check:
Relay-C should pulse for ~3 seconds (Don’t buy a stopwatch.. it is aboutish)
o
Make sure the Black wire is still connected to the MIN
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Take the Red wire from the +12V and hold to MIN (to discharge Capacitors C1)
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Locate Relay-C and make sure you can see it well.
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Reconnect Red-wire to +12V and watch relay-C. It should activate and… de-activate.. in
~3 seconds
o
If it did, you are good and you are on your way, if NOT, don’t worry (yet)
Check carefully the wires and connection.
Check your circuit (Maybe capacitor C1 is defect or wrongly connected (watch
the polarization of the capacitors!)
Second check:
Relay-A should activate.
o
Make sure Black wire is connected to MIN
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The Red wire is connected to + 12V
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Locate Relay-A make sure you can see it well.
o
Hold the white wire against the MIN (simulating the parking-brake switch)
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Relay-A should activate as long as you have the white wire against the MIN. To see it
well, remove the white wire from the MIN, it should de-activate and repeat it again.
o
If it did activate, you are great if not you are still good..
Check the circuit. Did put you the diode D1 correct? Is the capacitor correct
connected? Is D2 correctly connected (remember the stripe on the diode
should point to +12V)
Do you still have 12V (do you hear click-clack when connecting 12V)?
