fuel injection or hdi fuel pump power

[citroenxm]

Hi all.. not sure if this has been said before but i found today at least on hdi xantias that if you remove the double relay and then short pin 4 to pin 15 the tank fuel pumps runs constantly without the ignition on at all..

I assume petrols are the same as they use the same double relay do they not??

Just thought anyone might want to know incase they fill up with incorrect fuel and need to drain out*...

*(NO i didnt do this and never have done)