User`s manual
always, NC port 
2  Center control close, signal 
output 
3  Center control close, close 
always, NO port 
4  Center control open, open 
always, NC port 
5  Center control open, signal 
output 
6  Center control open, close 
always, NO port 
the backside description after a concretely install, ought to the 
function is to provide the phone long distance on/off car door 
lock used/ for the customize 24V, system doesn't consist this 
function 
7  Light direction control 
input/output 
8  Light direction control 
input/output 
Separate connected to the car turnaround lights 
9  Alarm horn control output  Police report voltage output, provide output 12V/3A to the 
energy sources to drive the electronic speaker 
10  Positive power supply input  Connected to the electric flask in positive 12V to provide the 
power supply 
11  Minus power supply interface  Connected to the negative electric flask 
12 GND 
13 SOS test 
Connected to the SOS button 
14  Car Audio control (only valid 
for VC-398GGTBA) 
Outside relay connection control is needed to control car audio
15  Engine power off output  Control the 40A relay motion to cut off the engine power supply
16  Car door test/ minus triggered  Use to test whether the car door is open or close 
17  Foot brake test  Connect to foot brake on/off 
18  ACC state test  Connect to ACC On position, test whether the car is on fire or 
not 
19 
20 
Middle control lock signal test 
Changed it to the updated version, then connected to the 
center control, up/down lock signal test 
2.  20 Pins color rank and functions description: 
No Color Functions  No Color Functions 
1  Orange    Center control off, NC  11 Black  Minus power supply 
2  White    Close signal output  12 Purple Grey   
3  Yellow  Center control off, NO  13 Green yellow SOS test 
4  Orange/Black  Center control on, NC 
(only valid for 
VC-398GGTBA) 
14 Orange/Black Outside hang relay 
control back case 
5  White/Black  Open signal output  15 Yellow    Power cut 
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