Mercedes Repair Questions? Ask a Mechanic for Answers ASAP
Hi, are you referring to the K40 relay?
Which plug did you take apart on the relay?
Yes , I had to replace the relay and did not mark the wires when I took it off and not sure how to wire it
What wires go on what side
The wires can only be installed in one position unless you removed them from the plugs.
Is that the relay you replaced?
I did I had to relace the whole switch can you send a wiring diagram
I am not following you. The plugs can only plug in one way.
There is one plug and 4 wires i know where the plug goes but there is 2 studs and 4 wires on top of the relay not sure which wires go on what stud
That does not sound like the K40 relay. Where is this part located?
on the passanger top fender
And it looks like the picture I gave you?
I gave you the K40 relay.
What are you working on?
I relaced the fuel pump and was told it was the switch on the right passanger fender
Can you give me the part number of the part you are working on?
The K40 relay that I showed you is the fuel pump relay.
will have to call the store one moment
one moment Please calling the store have not picked the part up yet Thanks
That is your battery cut off relay.
That is not your fuel pump relay.
does that switch have anything to do with the fuel pump and if not what do we need and also how do I wire that one up
No it does not
Click on the image
Those big wires all have power on them. I hope the battery is disconnected.
so is it the fuel pump relay what I need.... after we put the new fuel pump back on it still won't start
Possibly, if your fuel pump is not running it could be a bad K40 relay.
where is the k 40 relay located and what is the part number
The K40 is inside the module box right next to the relay you disconnected.
210 540 00 72, Relay
Thank You So Much