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Old 11-18-2009, 09:42 PM
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Join Date: Oct 2005
Location: Ottawa, Canada
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Ignition tumbler failed...how 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
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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
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Location: Philadelphia
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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.
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Old 11-18-2009, 11:46 PM
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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.

Charlie
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Old 11-19-2009, 12:05 AM
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Location: Ottawa, Canada
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I took the ignition housing out along with the tumbler. I have a new tumbler and keys already and an ignition housing on order.
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1984 300CD 155k miles
1983 300TD 199k miles
2005 Legacy GT Wagon
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