Help us help you. By posting the year, make, model and engine near the beginning of your help request, followed by the symptoms (no start, high idle, misfire etc.) Along with any prevalent Diagnostic Trouble Codes, aka DTCs, other forum members will be able to help you get to a solution more quickly and easily!
Hi, I have a 2003 Mercedes E500 and the fuel pump will not engage unless I jump the fuel relay. I have replace the rear SAM but that did not solve the problem. I have check fuse 87 in the pre fuse box and its hot, when I check fuse 43 in the engine bay fuse box (i Think from diagram somehow is involve) I don't get anything from my light meter. Can anyone point me in the right direction as to what to check for the fuel relay to engage?
Being that I do keys I am pretty sure keys are also tied into the fuel system. Can't say this for certain but being mbz & bmw vehicles are always ahead of their time it seems.
the guy I bought it from said that he took it to a repair shop and after they took it of their computer the car would not start unless the relay is jumped. I have xentry diagnostic tool, not really advance on all the know how but don't think it giving a key DTC
I just watch a scanner danner video on youtube and my fuse 43 should be hot and it is not. Only difference is he was working on an E500 4 matic. I am straight E500 hopefully no big difference.
His response was that he took it for a basic service and that the mechanic scan the car and was testing different features and then the car just would not start until they decided to jump the relay.
