|
|
|
|
|
LinkBack | Thread Tools | Display Modes |
#1
|
||||
|
||||
Door vacuum pump electrical connector crumbled. Where does each wire go?
Tonight on the 81 300SD, I was testing the vacuum line from the from the vacuum pump in the spare tire compartment to check for leaks in the door lock/fuel door/trunk lock vacuum circuit, and in the process, I knocked the electrical connector out of the vacuum pump. I went to put it back in and it wouldn't seat. Every time I tried to re-seat it, the wax-like material at the end of the connector would crumble until nothing was left (you can see the wax-like crumbles on top of the spare tire), leaving me with 3 wires with female sockets at each end. Long term, I'll cut an intact connector off of a car at the parts yard and splice it in, but for now, I can just plug each socket individually, but I don't know where each one goes. Here's a photo. Anyone know where each wire goes?
__________________
'81 MB 300SD, '82 MB 300D Turbo (sold/RIP), '04 Lincoln Town Car Ultimate Sooner or later every car falls apart, ours does it later! -German Narrator in a MB Promotion Film about the then brand new W123. |
#2
|
||||
|
||||
The schematic should be on Startek for free for that year.
Looking at your photo, it appears the connector is similar to the one in the 124s. There are 3 wires, one each from the driver door, passenger door and trunk/hatch. The three inputs are isolated from one another internally but they ultimately all do the same thing - tell the pump to apply vacuum or pressure depending on what you do with the key. If you are unlocking the switch ties the wire to +12 V (and the pump makes pressure), and if you are locking it grounds the wire (and the pump pulls vacuum). I do not think it matters which wire goes where on this 3 pin connector.
__________________
The OM 642/722.9 powered family Still going strong 2014 ML350 Bluetec (wife's DD) 2013 E350 Bluetec (my DD) both my kids cars went to junkyard in 2023 2008 ML320 CDI (Older son’s DD) fatal transmission failure, water soaked/fried rear SAM, numerous other issues, just too far gone to save (165k miles) 2008 E320 Bluetec (Younger son's DD) injector failed open and diluted oil with diesel, spun main bearings (240k miles) 1998 E300DT sold to TimFreeh 1987 300TD sold to vstech |
#3
|
||||
|
||||
I get an error page whenever I try to view electrical info for the 81 300SD on Startek.
Quote:
__________________
'81 MB 300SD, '82 MB 300D Turbo (sold/RIP), '04 Lincoln Town Car Ultimate Sooner or later every car falls apart, ours does it later! -German Narrator in a MB Promotion Film about the then brand new W123. |
#4
|
||||
|
||||
Oh that is different than the 124 pump. Those have 2 connectors.
A flat one, with +12 unswitched, +12 switched (ortho only) and ground, and a round one, with the 3 door signals.
__________________
The OM 642/722.9 powered family Still going strong 2014 ML350 Bluetec (wife's DD) 2013 E350 Bluetec (my DD) both my kids cars went to junkyard in 2023 2008 ML320 CDI (Older son’s DD) fatal transmission failure, water soaked/fried rear SAM, numerous other issues, just too far gone to save (165k miles) 2008 E320 Bluetec (Younger son's DD) injector failed open and diluted oil with diesel, spun main bearings (240k miles) 1998 E300DT sold to TimFreeh 1987 300TD sold to vstech |
#5
|
||||
|
||||
I agree that the three wires can probably go to any of the three pins. It won't hurt to experiment: connect one wire to one pin and try the various door and trunk locks to see if you can get one of them to lock/unlock all of the locks. Then try another one, etc.
Jeremy
__________________
"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 |
#6
|
||||
|
||||
I did a little experimenting. Found that the wires wouldn't stay connected, they kept sliding out. So one of these days, I'll go out to the parts yard and cut off a keyed connector from another SD and splice it in. Then, I'll know for sure that the wires are in their right spots.
__________________
'81 MB 300SD, '82 MB 300D Turbo (sold/RIP), '04 Lincoln Town Car Ultimate Sooner or later every car falls apart, ours does it later! -German Narrator in a MB Promotion Film about the then brand new W123. |
Bookmarks |
Thread Tools | |
Display Modes | |
|
|