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#1
05-03-2007, 10:50 AM
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300SD How does the trunk work?
I am trouble shooting some vacuum leaks and trying to resolve some A/C issues since I am messing with the mighty vac what is the proper way for the doors to lock and the trunk to unlock. Right now I push the door locks down and they stay locked, but I have to push each one down separately. I though I read that the driver door controlled all doors or something. Also I can open the truck with the key only. Is that the normal operation? Another question is what is that pump type thing in the spare tire well? Also is the fuel door connected to this all as well and does it lock?
Lots of question but I have found nothing that tells me what the normal operation is for these systems. I have done tons of searching of this board and been able to diagnose must of my A/C and tranny shifting problems. Thanks to all the gurus out there. David 83 300SD 265K on car 6K on Veggie Oil.
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1983 w126 300SD 280K 1967 Ford bronco 2002 Volvo S60 1996 Ford F350 powerstroke no mas 1977 240D 200k plus miles (no interior) 
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#2
05-03-2007, 11:04 AM
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the pump in the trunk actuates the locks in all doors, trunk, and fuel door. WHEN it works. I believe the front door has electrical switches connected to the pump for the lock mechanism. that is where I would (and will soon...) start. get the pump to work off the door lock.
then go from there to figure out what actuators are not working, or leaking. John
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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread "as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do! My drivers: 1987 190D 2.5Turbo 1987 190D 2.5Turbo 1987 190D 2.5-5SPEED!!!  1987 300TD 1987 300TD 1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!
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#3
05-03-2007, 12:25 PM
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Yes, the drivers door lock is the "switch" to activate the pump in the trunk. Open the trunk and listen for the pump to cycle when you lock/unlock. On mine, I replaced the flex line at the pump and no more troubles. Maybe you will be as fortunate.
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Sam 84 300SD 350K+ miles ( Blue Belle )
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#4
05-03-2007, 01:48 PM
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door locks
Do the door locks recieve any vacuum from the engine?
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1983 w126 300SD 280K 1967 Ford bronco 2002 Volvo S60 1996 Ford F350 powerstroke no mas 1977 240D 200k plus miles (no interior)
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#5
05-03-2007, 01:52 PM
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not on the SD...
John
__________________
John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread "as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do! My drivers: 1987 190D 2.5Turbo 1987 190D 2.5Turbo 1987 190D 2.5-5SPEED!!! 1987 300TD 1987 300TD 1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!
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