i just put in a new amp not rebuilt and rebuilt servo-got air flow with blower for about 5 seconds then nothing,now i get heat but very low flow and no cold air flow-any ideas as to how to evaluate if rebuilt servo is working.i know there is an inline fuse in fuse box as well.i aslo know about temp sensor at dash,but i dont know where to go from here.servo came from ebay-this guy dougstar-was recommended by another member .

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95 e320,87 sdl,79 300sd

Have you checked the main vacuum switch to assure it is functioning? If it's not working, nothing else will. You can jump the wires coming out of that vacuum switch to test it. I have a link in here to the servo manual. If you search on my user name and servo, it should show up. It has lots of test procedures in it.

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1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13

i will check your link,where is main vacume switch/

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95 e320,87 sdl,79 300sd

Behind the glove box.

__________________
1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13

whats it look like ive got glove box out is it near amp?

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95 e320,87 sdl,79 300sd

i see it,so are you saying to connect the two vac lines together and see if it works bypassing vac unit?

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95 e320,87 sdl,79 300sd

Servo service manual
http://www.peachparts.com/shopforum/general-information/240606-evil-servo-service-manual.html#post2053754





Good luck.

__________________
ASE Master Mechanic
https://whunter.carrd.co/

Prototype R&D/testing:
Thermal & Aerodynamic System Engineering (TASE) Senior vehicle instrumentation technician.
Noise Vibration and Harshness (NVH).
Dynamometer.
Heat exchanger durability.
HV-A/C Climate Control.
Vehicle build.
Fleet Durability
Technical Quality Auditor.
Automotive Technical Writer

1985 300SD
1983 300D
2003 Volvo V70

https://www.boldegoist.com/

No, connect the electrical wires that are connected by the vacuum switch when it operates.

__________________
1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13

turns out its my blower motor,got a used one coming

__________________
95 e320,87 sdl,79 300sd

I've got a thread on here with pictures showing how to much new brushes in a 116 blower motor.

__________________
1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13

116 blower failure diagnostics
http://www.peachparts.com/shopforum/diesel-discussion/240542-116-blower-failure-diagnostics.html#post2052909

Disassembling a 116 blower motor
http://www.peachparts.com/shopforum/diesel-discussion/243799-disassembling-116-blower-motor.html#post2093283

Replacing the brushes on a 116 blower motor
http://www.peachparts.com/shopforum/diesel-discussion/244338-replacing-brushes-116-blower-motor.html#post2100313