fuel pump with Continuous sound

[Mercedes only]

Yesterday, during the car is turned off :
Remains a voice in the back , Specifically from the fuel pump . (ZZZZZZZZZZZZZZZZZZZ)

The only solution to stop the sound is :
on and off the switch many times or disconnect the battery .


--Before many months Delay to start .


I wanted to make sure about " Fuel pump relay " Disconnect it , then reconnect :
the sound come " tek tek tek tek tek tek " ..
== above 2000 RPM nothing " no sound ".


== Car no start without small Copper wire ..

What happened ?
fuel pump good or bad with small Copper wire ??
fuel pump relay ??

 

[gsxr]

It's either a bad relay, or defective LH module (the LH module triggers the relay).

 

[Mercedes only]

What should I do ?

What about small Copper wire ..

Also ,
RPM above 1000 During stand !!! Any Comment !!!!!!

 

[gsxr]

Replace the relay first and see what happens. Also check all the fuses in the fusebox, and also in the Basic Module (General Module) in the CAN box.

 

[Mercedes only]

Thank you .

I will Replace the relay .

All the fuses are good .

" also in the Basic Module (General Module) in the CAN box. " ,, How ?????

 

[gsxr]

" [/FONT][/SIZE]also in the Basic Module (General Module) in the CAN box. " ,, How ?????

This module in the CAN box (under the hood, passenger side) has four ATC-style fuses. Check them to make sure all are good. See attached photo of the BM / GM removed from the box (no need to remove to check the fuses, btw).

 

[Mercedes only]

Thank you .
Thank you .
I am sorry about my questions :|:| ..



I saw this ???..............

 

[gsxr]

Looks normal... if the three blue fuses are good, most likely you're back to the defective relay, or possibly LH module.

 

[Mercedes only]

I am sorry about my questions ..


Thank you .....

 

[Mercedes only]

I replaced it today ..
p/n # 001 542 96 19
" Original " ............

With new part = no sound " ZZZZZZZZZZZZZZ " with or without start . // car : No
Operate at all ..

With old Relay = sound " ZZZZZZZZZZ " with and without start .// car : Operate .

With small Copper wire = with start : sound and car Operate with continues Sound , and no sound without start ..


????????????????????????

 

[gsxr]

Sounds a lot like a defective LH module. Can you borrow a spare LH module from another car temporarily? For test purposes it can be from any year/chassis with either 4.2L or 5.0L V8.

 

[Mercedes only]

Very difficult , But I will try.

Is there an image or attachment to clarify ??

 

[gsxr]