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Old 11-18-2009, 09:42 PM
Registered User
Join Date: Oct 2005
Location: Ottawa, Canada
Posts: 59
Ignition tumbler do I hotwire?

My 1984 300cd is currently abandoned at my workplace after the ignition tumbler failed on me. After hours of fiddling with the key and trying to get it to position 1 so I could remove the tumbler the key broke in the ignition. I eventually had to cut through the steering lock to remove the whole ignition unit.

I really have to get the car home so I can repair it.

I have the ignition switch exposed, so how would I go about hot wiring the car so I can get it home?

I'm guessing I will need to connect two terminals in order to start the glow sequence, then briefly connect another two terminals to actuate the starter.

I found the following in a thread by tangofox007. My ignition switch has the same wiring as this one...

From 1982 300D Electrical Troubleshooting Manual:

15R: GN/RD from Fuse 4
50: VI/WT from Start Lockout Switch
30: RD from light switch
15X: RD/YL from Fuse 8
30: RD from light switch
15: RD/BK from Fuse 12
P30: GN/WT from light switch
1984 300CD 155k miles
1983 300TD 199k miles
2005 Legacy GT Wagon

Last edited by maceo1973; 11-18-2009 at 10:14 PM.
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Old 11-18-2009, 11:44 PM
tbomachines's Avatar
Join Date: Mar 2009
Location: Philadelphia
Posts: 5,362
Do you mean that you have the tumbler out? You can also cut the ignition housing iin half if you have a dremel or something, just use a screwdriver as a key.
Current stable:
- 2004 Mazda RALLYWANKEL
- 2007 Saturn sky redline
- 2004 Explorer...under surgery.

Past: 135i, GTI, 300E, 300SD, 300SD, Stealth
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Old 11-18-2009, 11:46 PM
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Join Date: May 2007
Location: Out in the Boonies of Hot, Dry, Dusty, Windy Nevada
Posts: 9,585
I think if you unplug the brown vac line to the back of the Injection Pump,
then jump 2 of the screws in the black junction box on the inner R/F fender by the battery. You will be good to go.

A pair of needle nose plires works good for the jump.

there were three HP ratings on the OM616...

1) Not much power
2) Even less power
3) Not nearly enough power!! 240D w/auto

Anyone that thinks a 240D is slow drives too fast.

80 240D Naturally Exasperated, 4-Spd 388k DD 150mph spedo 3:58 Diff

We are advised to NOT judge ALL Muslims by the actions of a few lunatics, but we are encouraged to judge ALL gun owners by the actions of a few lunatics. Funny how that works
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Old 11-19-2009, 12:05 AM
Registered User
Join Date: Oct 2005
Location: Ottawa, Canada
Posts: 59
I took the ignition housing out along with the tumbler. I have a new tumbler and keys already and an ignition housing on order.
1984 300CD 155k miles
1983 300TD 199k miles
2005 Legacy GT Wagon
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