Passenger fuse box affects Hazard and Signal Light?

Field Case Study

Model:Hyundai Elantra (HD)

Year Model: 2009

Mileage: 79251km

Displacement: 1600cc

T/A: All

Fuel: Gasoline

1) Condition:

1. Intermittent Turn and Signal light not Working.

2) Cause:

1. Due to the hazard and signal light fuse busted
2. Overheating Car Stereo.

3) Diagnosis:

1. Scan toll check = No trouble code found.
2. Check the fuse and relay from engine compartment fuse box = Hazard fuse busted (Replace fuse)
3. Check the fuse and relay from the passenger fuse box = signal or turn light fuse busted(Replace fuse)
   
   = Test the car with all lights on to see if the problem still occurs.After an hour = Ok All are working
   = Then  all lights switch off except signal light, then the Car stereo switch On After a minute suddenly the signal light block out.
4. Check for the Electrical Trouble Manual of Hazard and Signal light and Car Stereo = there is no wire connected to the Car stereo, but their only joint together on the electronically passenger fuse box.
5. Check for the diagram of Car stereo and check the wire connection = the power memory wire is seems like burnt from the passenger fuse box to the stereo terminal.
6. visually check the fuse box, power memory terminal corroded.
7. Check for wire shorted = OK all wire good.
8. Found out that the Car stereo overheating.

4) Repair Guide

1. Replace passenger fuse box and Car Stereo.

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