Required tools: Multi-meter
If above wires doesn't show any voltage then battery need to be checked.
Step 2 : Connection 12 & 5 should have same voltage as battery voltage. If connection doesn't show same volatage as battery voltage then problem should be in following module.
1) LED Switch -
a. In LED Off state connection 13 & 5 should show 12V - If 12V not shown then please check key switch connection.
b. In LED On state connection 14 & 5 should show 12V - If 12V not shown LED switch is faulty.
2) Relay - Basic observation to check relay - When LED switch toggles that time relay should create (click sound) if there is no sound then relay is faulty.
a. Connection 17 & 5 should show same as battery voltage - or Red wire in 3 core wire could be damaged.
b. Connection 16 & 5 should show same as battery voltage in LED On stage - or Yellow/Green wire in 3 core wire could be damaged.
Step 3 : Voltage between (8) and (9) should show 5V
Step 4 : Accelerator Setting - in ideal stage Voltage between (8) and (10) should be below 1.2V