seems i have no 12V power going to my skreem module. can any techie's help here ? is is a relay ? a fuse ? i replaced fuses 9,35 & 37. low milage. no corrosion issues. Car lives in a heated garage. thanks for the help.

 

Have no idea since we don't know what it doing / not doing etc.

 

had all the classic symptoms of a faulty skreem. would crank over 2-3 times then nothing. sent the unit out to be refurbished.....same thing. sent the unit back. it was tested and worked fine at needswings. dropped it back in the car, the same thing. today i tested #18 & #16 for voltage and got none. then tested #16 & #10 with the same results. hence , i believe i am not getting 12V to my skreem unit. i was looking for a technical advice for what would be the next step in resolving my no start issues. thanks

 

you need to check fuses 35-37 also

 

Have you replaced the RCM?

 

wiring schematics download service manual for free: service manual

 

do these symptoms warrant a replacement RCM ? everything points to the skreem unit. (right now i have no power to the scream unit) have also replaced fuses #9 & #35 & #37. thanks Doug

 

Those symptoms can also be the RCM. To have the screem checked out contact Josh Chase at the Mercedese swap shop (mss)

 

I work with Josh lol if needs anything call me 980 266 1954

 

His post #3 says it was checked and found to be OK by NeedsWings.
He has posted about this problem in three or four threads he started since the new year, anyone got the time to read them all.?

 

has your mechanic gone through the next round of troubleshooting i emailed him last monday?

 

And I gave him a link to the wiring diagrams; dog delisera needs to do some detective work himself.

 

i was out of town a few days....then got sic, i should be better this weekend. Will get at it. Thank you for all your help. You are a great resource & I really appreciate you.

 

i would like to thank Josh @ MSS and also Rob from NeedsWings for trying to help me through this difficult period. It seems that there was a faulty connection to the skreem. The car wasn't talking to itself...not giving itself the authority to start. It was a difficult fix not having the scanners needed to find the problem. The connectors "clicked" in, but were still not making proper contact. Go Figure....it should have been so easy. Again thanks to all from this great forum for trying to help.

 

Thank you for letting us know the problem is resolved.