i bought an electric vacuum pump out of an 85 300SD to see if i could get it to work in my 83 300SD. The differance of the pumps is incredible. The 85 has a circut board and one additional plug with 2 prongs in it. It still has the the 3 hole plug that my old one had. Do you think i'll be able to make this work? are the other two plugs just for the alarm or are they.............? TIA, i'm sure if anyone can answer this it'd be the people on this board.
Ryan

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83 300SD.......sold
96 integra SE....sold
99 a4 quattro....sold
2001 IS300.......sold
2002 330i.........current.
2004 highlander limited....current.

uhhhh, guys, lil help please??
ryan

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83 300SD.......sold
96 integra SE....sold
99 a4 quattro....sold
2001 IS300.......sold
2002 330i.........current.
2004 highlander limited....current.

You picked a bad day as all the Texas talkers are having their shindig!!!!

Did you look up the circuit in your CD ETM section for these years? If so what's the difference? If not you better hit the books!!

If I get a chance later tonight I give it a look if you don't get an answer by then. Later!

anyone? anyone at all? paging anyone.............

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83 300SD.......sold
96 integra SE....sold
99 a4 quattro....sold
2001 IS300.......sold
2002 330i.........current.
2004 highlander limited....current.

Ryan, You know I spoke to you last evening about studying for your practical exam covering Electro-Vacuum Operated Locking Systems! And from the tone of your voice young man I can already tell that you are not prepared! Professor D.

Seriously though, you've got to get out your 126 CD, go to the 85 300 SD and open the Electrical Troubleshooting Manual, go to PDF page 66 that diagram looks like your 83 vacuum unit with three electrical connections, page 67 has the next generation vacuum unit with the orthopedic seat capability, and page 68 has the information about the 85 vacuum unit with five electrical connections. From a quick look it appears that the more complicated circuitry uses a different control voltage signal scheme. You may have to use a 85 driver door lock switch to control to 85 pump unit, you would need to study the schematic and probably connect things together outside of the car and test the setup until you could make it work. I've no doubt that it could be done given the parts and patience but you would make you life much easier, though less challenging, by simply finding a proper model replacement pump. I believe there may be at least one for sale on E-Bay right now. I don't know where you are in Florida but when I lived in WPB there where more than a few boneyards in South Florida and I'm pretty sure there are quite a few around the rest of the state as well. You could scavenge around a couple and you should be able to find what you need. You could take a girlfriend and make it into a picnic/hunt, I'm sure she'd be impressed!!!!!!


P. S. Hey,by the way, did you ever get that Outside Temp. Display figured out and working?

thanks billybob. You are correct in that i havn't done my homework, i must admit that i really am not good at reading electrical schematics. I really need to learn how though, especially since i want to be an engineer. Do they teach you that stuff in college?? I havn't completely rigged up the sensor yet, but i did test it outside the car and it seemed to work fine. That will probably be tonights project in fact(since i'm off work), and i'll let you know how it goes. ONly thing i noticed was it read out in degrees Celcius!!! guess i'll have to lear that real quick too.... May call up the boneyard and say i've got a vacuum pump out of an 85, will you trade me for an 83??
thanks
Ryan

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83 300SD.......sold
96 integra SE....sold
99 a4 quattro....sold
2001 IS300.......sold
2002 330i.........current.
2004 highlander limited....current.

Hey, no sweat I was only pulling your chain, I never did mine either!

Maybe you could find a swap for your pump in the Parts Forum? You could probably try the same for you outside temp. LCD, maybe some one wants the euro effect!

Better yet if you keep and install it you while be forced to constantly do Fahrenheit to Celsius and Celsius to Fahrenheit conversions in you head. If you decide to become an engineer there will probably come a time when this ability; that will have by then become second nature to you, could be pretty useful, could maybe impress a professor or a boss and you'll look back at this circumstance and see that it was really an unrecognized advantage to not get the part you wanted! Good Luck!

I recently went to the Junkyard and pulled what appears to be a mint vacuum pump for the central locking system. Mine died a horrible death due to water getting into the trunk. Today I go to swap my old cruddy one out with the new one I got from the junkyard only to find this problem......the pump I got must have been from an 85'+ model 126 and will not work unless I do some crazy rigging (something I don't really feel like doing). I don't want to throw down the money for new one as they are quite expensive so I guess it's back to the Junkyard for me. Anyone have a pump from the 81-84 years that would be willing to swap for the one I have with the five electrical connections?

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1983 300SD White with Grey interior

Try the parts forum.

Sixto
87 300D

Could the extra plug and the circuit board for keyless entry maybe? I don't know if that was ever an option on the later w126, but if so I'm sure you can make it work. You can take apart the plug and rearrange where the different wires go.

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"spreading a trail of obnoxious where ever we go"
1981 300sd w/ 341,500 miles

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