2006 diesel.

Can anyone tell me how the power is supplied to the switching side of the tank pump relay? I have the main power to the relay but  no power to the switching side when the ignition is turned on.

Is it supplied via just a fuse or another relay.

Location/ number of the fuse / relay would be appreciated.

Engine code or VIN will help a lot in answering this.

Spoiler

 

 

Check engine bay fusebox, fuse 15, 5 Amp rated. 

Checked fuse. All ok. Is this the fusebox you are expecting?

Yep. That fuse and several others are fed by that 100 relay, so could be that playing up.

Ok. Thanks. Will try to test it.

I have no voltage at the fuse and 12 volts at the bottom and left terminal with the ignition on.

Did this help as I have the same problem with my skoda 

I have changed the relay under the bonnet but it doesnt seem to make any difference.

On 01/03/2024 at 23:02, Skodacds said:

I have the main power to the relay but  no power to the switching side when the ignition is turned on.

 

Are you sure that you should have?

 

From memory my 2006 diesel would pulse the fuel pump briefly when the ignition was turned on, other vehicles do it when the drivers door is opened, yours may be either but I dont thnk the pump will be activated with just the ignition on, the engine needs to be cranking or running.

 

When I fitted a new fuel filter I had to repeatedly switch the ignition to get the pump to purge the system.

1 hour ago, Skodacds said:

I have changed the relay under the bonnet but it doesnt seem to make any difference.

 

Does the vehicle run or not?

 

That is important information that you have omitted.

The car doesnt start.

It appears i have been approaching this from the wrong direction. The sytem is -ive switching not +ive.  I have found someone who knows all about it and he is coming out to take a look.