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#1
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1981 300D starter wont crank?
I have a 1981 Mercedes 300D with a fully charged battery, but the starter wont crank? What could the problem be?
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#2
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Jump terminals 1 and 3 in the plastic junction box on top of the right inner fender in front of the battery. Report back with the results.
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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 |
#3
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Bad starter or bad connection to the starter are the two most obvious issues that would cause the starter not to spin. Unless....the car is in gear.
Also, have you tried starting the car in PARK AND then in NEUTRAL? If you try starting it in gear it won't spin the starter via the NSS (neutral safety switch). When the NSS goes bad it only starts in NEUTRAL.
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2009 ML320 Bluetec 1985 300CD 1981 300TD Past Mercedes 1979 300TD 1982 300TD 2000 E320 4Matic Wagon 1998 E430 1984 300SD 1980 300SD |
#4
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Got this from another forum. If you think it might be the Neutral Safety Switch. However, this if for an 84 300D; I do not know if all 123s are wired the same.
“First make sure the selector is in P or N. Cycle through all the gear positions and try in N. In front of the battery is a small rectangular box. Use a jumper wire to jump from one of the large posts to the small post with the purple wire. If it cranks, you've got an issue with the neutral safety switch or the ignition switch. Above the accelerator pedal is a 4-wire plug with a harness that runs down to under the accelerator pedal and to the transmission tunnel. Unplug it, jumper across the two purple wires in the female plug and try to start again. If it starts, you need a NSS.” I do not know if your cars wiring is the same but I got part of this quote from another Forum concerning a no cranking problem with an 84 300D.
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84 300D, 82 Volvo 244Gl Diesel |
#5
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I'll agree with folks that mention the NSS.
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83 SD 84 CD |
#6
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If the starter does not spin when you jump terminals 1 and 3, chances are your starter is bad and it's not the NSS since jumping the terminals bypasses the NSS.
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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 |
#7
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Sorry to bring up an old post but any help would be grateful, I just thought id ask, but could the NNS be at fault for a starter that turns over but does not catch and just makes a loud "zinggg" noise sometime?
I replaced my trans for the first time once, and since when trying to start it sometimes the starter would catch turning the engine over, sometimes it wouldnt causing the "zingggg" sound. The reason I think it might be the NNS is because since replacing the transmission the gear selector is not lined up correctly (my first trans swap ever), as in when it shows im in D, if I started from D sometimes it thinks im in S and ill have to move it up to N just slightly if it doesn't switch gears, then back down to D and it will be normal... If thats the case then I wont need to pay for a brand new starter that I just ordered... Of course I could test this by trying to start my car in N when it makes that noise but this is the first ive thought about it being the NNS and considering its just past 2AM I dont think the neighbors would appreciate it... Thanks for any info!
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1984 300D | Semi Rust Free Florida Car | 184K 1985 300TD | Rusted Out | Parted To The Bone Then Crushed Last edited by l3ushwig; 09-18-2012 at 03:17 AM. |
#8
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If the starter engages at all, the NSS is okay.
You may have a starter issue.
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83 SD 84 CD |
#9
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sorry, no.
the zing could be from alignment issues with the ring gear, or a bad bendix/gear on the starter itself. did you pull the starter when you changed the trans? if so, you may have left off the rear bracket, or gotten something in the mount that has it cocked, slightly...
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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! |
#10
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The NSS disables starting alltogether. If your starter makes a "zinggg" noise, it is a dirty/faulty starter solenoid.
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