Oops what did I do. Electrical short
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Oops what did I do. Electrical short
Working on my S500 that I recently picked up. The rear fuse box under the seat had some bad relays so I purchased the whole SAM unit used with all the relays.
Simple enough I had the whole thing in my hands changing relays and I accidentally touch the large hot wire to ground. Now the car will not run. Turns over runs a little bit barley. No fuel it seems since it does start barley.
I blew the pre fuse in the trunk it seems. I bypassed it and have power to the fuse box again but it will not run. Still seems that the fuel pump isn't running.
Any ideas ?
I will I will dig in more tomorrow jumper the fuel pump relay and so forth. Not sure what I may have done.
Simple enough I had the whole thing in my hands changing relays and I accidentally touch the large hot wire to ground. Now the car will not run. Turns over runs a little bit barley. No fuel it seems since it does start barley.
I blew the pre fuse in the trunk it seems. I bypassed it and have power to the fuse box again but it will not run. Still seems that the fuel pump isn't running.
Any ideas ?
I will I will dig in more tomorrow jumper the fuel pump relay and so forth. Not sure what I may have done.
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VahanQeri (03-09-2020)
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2009 E350 4M Avantgarde;mistress 2002 S600; wife 2014 C300 4M
You NEVER EVER work on SAMs (other than pulling fuses or relays etc) with the battery connected.
My neighbour had a beautiful E500, and decided to change a front shock.
For that he removed the front left SAM (live!) and shorted "something".
He than had "somebody with MB experience" work on it. I tried to help with my SDS, which showed some CAN bus problems, but he went back to the same guy who had just a VOM meter.
Eventually he scrapped the car out of frustration.
My neighbour had a beautiful E500, and decided to change a front shock.
For that he removed the front left SAM (live!) and shorted "something".
He than had "somebody with MB experience" work on it. I tried to help with my SDS, which showed some CAN bus problems, but he went back to the same guy who had just a VOM meter.
Eventually he scrapped the car out of frustration.
#7
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You NEVER EVER work on SAMs (other than pulling fuses or relays etc) with the battery connected.
My neighbour had a beautiful E500, and decided to change a front shock.
For that he removed the front left SAM (live!) and shorted "something".
He than had "somebody with MB experience" work on it. I tried to help with my SDS, which showed some CAN bus problems, but he went back to the same guy who had just a VOM meter.
Eventually he scrapped the car out of frustration.
My neighbour had a beautiful E500, and decided to change a front shock.
For that he removed the front left SAM (live!) and shorted "something".
He than had "somebody with MB experience" work on it. I tried to help with my SDS, which showed some CAN bus problems, but he went back to the same guy who had just a VOM meter.
Eventually he scrapped the car out of frustration.
Where to start is a better approach then telling me what I did wrong. I know what I did.
The he car will start so hopefully I have just blown a fuse somewhere. The fuse boxes on these cars are not easy to sort out. Just finding the fuel pump fuse is a challenge. It isn't even listed on my fuse sheet.
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'99 and '05 E55 AMG
Here.
http://workshop-manuals.com/mercedesbenz/
Slow wading through the pages and some of it repeats but eventually you can find the info for which you're looking.
Sample page here:
http://workshop-manuals.com/mercedes...ent_locations/
You can use a multi-meter to rapidly check the fuses as in the photo; easier than pulling them out to visually verify.
Also, see if you can find someone with a diagnostic system who can come to you; that will give you a list of all failed systems within five minutes.
http://workshop-manuals.com/mercedesbenz/
Slow wading through the pages and some of it repeats but eventually you can find the info for which you're looking.
Sample page here:
http://workshop-manuals.com/mercedes...ent_locations/
You can use a multi-meter to rapidly check the fuses as in the photo; easier than pulling them out to visually verify.
Also, see if you can find someone with a diagnostic system who can come to you; that will give you a list of all failed systems within five minutes.
Last edited by bbirdwell; 10-18-2016 at 01:17 PM.
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2009 E350 4M Avantgarde;mistress 2002 S600; wife 2014 C300 4M
All I was doing was changing relays. Obviously this was a bad idea on my part but now I need to fix it.
Where to start is a better approach then telling me what I did wrong. I know what I did.
The he car will start so hopefully I have just blown a fuse somewhere. The fuse boxes on these cars are not easy to sort out. Just finding the fuel pump fuse is a challenge. It isn't even listed on my fuse sheet.
Where to start is a better approach then telling me what I did wrong. I know what I did.
The he car will start so hopefully I have just blown a fuse somewhere. The fuse boxes on these cars are not easy to sort out. Just finding the fuel pump fuse is a challenge. It isn't even listed on my fuse sheet.
Good luck in finding a fix!
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When working on electronics it is a very good idea to disconnect the battery and wait about 15-30 minutes to make sure that everything has shut down.
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#12
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Working on my S500 that I recently picked up. The rear fuse box under the seat had some bad relays so I purchased the whole SAM unit used with all the relays.
Simple enough I had the whole thing in my hands changing relays and I accidentally touch the large hot wire to ground. Now the car will not run. Turns over runs a little bit barley. No fuel it seems since it does start barley.
I blew the pre fuse in the trunk it seems. I bypassed it and have power to the fuse box again but it will not run. Still seems that the fuel pump isn't running.
Any ideas ?
I will I will dig in more tomorrow jumper the fuel pump relay and so forth. Not sure what I may have done.
Simple enough I had the whole thing in my hands changing relays and I accidentally touch the large hot wire to ground. Now the car will not run. Turns over runs a little bit barley. No fuel it seems since it does start barley.
I blew the pre fuse in the trunk it seems. I bypassed it and have power to the fuse box again but it will not run. Still seems that the fuel pump isn't running.
Any ideas ?
I will I will dig in more tomorrow jumper the fuel pump relay and so forth. Not sure what I may have done.
I I still have a bunch of check control issues that I had before all of this which is why I was fiddling with the Sam in the first place. The unit may be faulty but I haven't verified that yet.
I get BAS, door open, and several other warnings on the screen.
#13
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"I made a more secure bypass of this fuse..."
Another short-circuit might let the magic smoke out of the wires.
Another short-circuit might let the magic smoke out of the wires.
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shadenfroh (10-21-2016)
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