a couple days ago the central locking system stopped working. I was reading the W124 shop manual cdrom i bought on ebay. It was showing me how to test if the power cable for the pump is giving power. I checked with a multimeter, and the multimeter read nothing.

Im assuming im getting no power from the cable. The manual refers to a 30A strip fuse according to the wiring diagram but i cant seem to figure out which fuse they are reffering too.

much help appreciated!

EDIT: i forgot to mention checking the fuse box. The paper says row-C is for the central locking system (in the fuse box) so i replaced them all with new fuses but no go

__________________
Current:
05 E320 CDI
07 GL320 CDI
08 Sprinter
05 Dodge Cummins
01 Dodge Cummins

Previous
2004 E55 AMG
2002 C32 AMG (#2)
1995 E300
1978 300D
1987 300D
2002 C32 AMG(blown motor :[
1981 300SD
1983 300SD
1987 300SDL
2002 Jetta TDI
1996 S420
1995 S500
1993 190E 2.6
1992 190E 2.3
1985 190E 2.3 5-Speed

so when you lock or unlock the car using drivers, trunl or passenger locks can you feen the pump running at all?

No the pump doesnt operate at all when i lock or unlock any of the doors or the trunk. Thats why i suspect im getting no power from the cable. The mulimeter doesnt read anything coming from the cable.

__________________
Current:
05 E320 CDI
07 GL320 CDI
08 Sprinter
05 Dodge Cummins
01 Dodge Cummins

Previous
2004 E55 AMG
2002 C32 AMG (#2)
1995 E300
1978 300D
1987 300D
2002 C32 AMG(blown motor :[
1981 300SD
1983 300SD
1987 300SDL
2002 Jetta TDI
1996 S420
1995 S500
1993 190E 2.6
1992 190E 2.3
1985 190E 2.3 5-Speed

ok i was over at reids house (dieseldiehard) and we were trying to see why my locks werent working. It seemed like the power cable wasnt grounding correctly. So we connected it straight to a battery but still no go.

We tested what i think were the actuator cables with a multimeter but read nothing.

The shop manual cdrom i had would refer to a fuse that we cant seem to find. We tested the fuse boxes central locking system fuse for power and was properly working but the locks still dont work. Reid thinks the fuse is located somewere under the dash, tomorrow morning im going to be looking for fuses under there but maybe someone else here can help me. figure out this problem.

__________________
Current:
05 E320 CDI
07 GL320 CDI
08 Sprinter
05 Dodge Cummins
01 Dodge Cummins

Previous
2004 E55 AMG
2002 C32 AMG (#2)
1995 E300
1978 300D
1987 300D
2002 C32 AMG(blown motor :[
1981 300SD
1983 300SD
1987 300SDL
2002 Jetta TDI
1996 S420
1995 S500
1993 190E 2.6
1992 190E 2.3
1985 190E 2.3 5-Speed

BUMP

Anyone have an idea of where the fuse is located?

__________________
Current:
05 E320 CDI
07 GL320 CDI
08 Sprinter
05 Dodge Cummins
01 Dodge Cummins

Previous
2004 E55 AMG
2002 C32 AMG (#2)
1995 E300
1978 300D
1987 300D
2002 C32 AMG(blown motor :[
1981 300SD
1983 300SD
1987 300SDL
2002 Jetta TDI
1996 S420
1995 S500
1993 190E 2.6
1992 190E 2.3
1985 190E 2.3 5-Speed

Greasybenz, did you ever get this resolved? My wiring diag indicates that from fuse C the wire goes to X30 which is a connector block for accessories which appears to be under the drivers kick panel. I'm going to check that.

I put vacuum and pressure on the line at the pump and all doors locked and unlocked. I did not go a head and jumper the pump to see if it runs yet. I have power at fuse C but none at pump. Thanks for any advice.

__________________
What Would Rudolph Do?
1975 300D, 1975 240D, 1985 300SD, 1997 300D, 2005 E320 , 2006 Toyota Prius

bump. anyone?

__________________
What Would Rudolph Do?
1975 300D, 1975 240D, 1985 300SD, 1997 300D, 2005 E320 , 2006 Toyota Prius

I didn't know the 124 was different from the 126 in this regard. The 126 vac pump gets it's power directly from the fuse box in the engine compartment.

Can anybody pull up the w124 diagram and confirm this?

__________________
Michael LaFleur

'05 E320 CDI - 86,000 miles
'86 300SDL - 360,000 miles
'85 300SD - 150,000 miles (sold)
'89 190D - 120,000 miles (sold)
'85 300SD - 317,000 miles (sold)
'98 ML320 - 270,000 miles (sold)
'75 300D - 170,000 miles (sold)
'83 Harley Davidson FLTC (Broken again) :-(
'61 Plymouth Valiant - 60k mikes
2004 Papillon (Oliver)
2005 Tzitzu (Griffon)
2009 Welsh Corgi (Buba)

I have the wiring diag. It does say it goes from fuse C to an electrical connecting block X30 and then to pump.

I looked for X30 lastnight under drivers kick panel. Could not find it. I did find the big plug that connects blinkers and other instruments from fuse box though..


Here is pic of Fuse Block Details for Fuse C . I cant find the X30 connector block.

__________________
What Would Rudolph Do?
1975 300D, 1975 240D, 1985 300SD, 1997 300D, 2005 E320 , 2006 Toyota Prius

Just jumpered my pump wire from the battery to test my pump. It works and all doors lock from passenger door. Drivers door is different story. But, good to know the pump works. Still looking for X30 plug.

__________________
What Would Rudolph Do?
1975 300D, 1975 240D, 1985 300SD, 1997 300D, 2005 E320 , 2006 Toyota Prius

Found and fixed my problem thanks to member here who pointed me to this link http://www.peachparts.com/shopforum/showthread.php?t=50485&highlight=X48F

The x84F (see fuse block details above) wire connection under carpet in right passenger floor was corroded. That is where power wire branches to pump , dome lights in middle, and all 3 lock actuators. Not a bad fix.

__________________
What Would Rudolph Do?
1975 300D, 1975 240D, 1985 300SD, 1997 300D, 2005 E320 , 2006 Toyota Prius

Glad you found it. It would be nice if the manuals had actual locations of these parts/connections.

__________________
Michael LaFleur

'05 E320 CDI - 86,000 miles
'86 300SDL - 360,000 miles
'85 300SD - 150,000 miles (sold)
'89 190D - 120,000 miles (sold)
'85 300SD - 317,000 miles (sold)
'98 ML320 - 270,000 miles (sold)
'75 300D - 170,000 miles (sold)
'83 Harley Davidson FLTC (Broken again) :-(
'61 Plymouth Valiant - 60k mikes
2004 Papillon (Oliver)
2005 Tzitzu (Griffon)
2009 Welsh Corgi (Buba)

The ETM does have parts locations; some even include tagged pictures. Page 142/1 "Central Locking System) has a note "For Component Locations See Page 204." On page 204, X48F is listed as being part of the "Central locking harness, right rear door sill."

__________________

"Buster" in the '95

Our all-Diesel family
1996 E300D (W210) . .338,000 miles Wife's car
2005 E320 CDI . . 113,000 miles My car
Santa Rosa population 176,762 (2022)
Total. . . . . . . . . . . . 627,762
"Oh lord won't you buy me a Mercedes Benz."
-- Janis Joplin, October 1, 1970