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  #1  
Old 04-22-2013, 12:16 PM
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Join Date: Jul 2010
Location: Perdido Key, FL
Posts: 65
Vacuum Locks//1987 300SDL

Here's the background;

Son put a new radio unit in the car. Took some time to figure how the wiring was previously done, but we got it working....kind of. Now the door locks will not operate.

I'm assuming there was a power lead connected somewhere to the harness with the radio....but I don't see it.

Any suggestions, or insight?

Lance-
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1985 300SD, 300k.....gifted to Daughter
1987 300SDL, 345k.....gifted to Son
1978 300CD, 230k
1983 300D, 175k....Dead
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  #2  
Old 04-22-2013, 01:08 PM
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Join Date: Oct 2011
Location: Columbia, SC
Posts: 3,158
I will take a stab in the dark on this one. The 1987 300 SD is the mechanical/electrical cousin of the first generation 124.

I looked into the circuit diagram for my 124 and it appears that fuse C is shared between the radio trunk amp and the central locking pump.

Look closely at the fuses, sometimes they split at the 90 degree bend between the cap and the strip, so they look good but can really be blown.
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2014 ML350 Bluetec (wife's DD)
2008 E320 Bluetec (my DD)
2008 ML320 CDI (Older son's college DD)
1998 E300DT (Younger son's college DD)
1987 300TD sold to vstech
----------
gone but living on
1983 240D (body to greazzer, engine to t walgamuth)
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  #3  
Old 04-22-2013, 01:43 PM
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Join Date: Jul 2010
Location: Perdido Key, FL
Posts: 65
Good call J-B.....I got tunnel vision with the radio and didn't think fuses. Thanks!
__________________
1985 300SD, 300k.....gifted to Daughter
1987 300SDL, 345k.....gifted to Son
1978 300CD, 230k
1983 300D, 175k....Dead
Reply With Quote
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