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  #1  
Old 08-12-2002, 05:16 PM
1992300e
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Trunk light crapped out

Hi all,

My trunk light crapped out. Not sure how to begin diagnosis. I checked with a good bulb and that did not work.

Any suggestions on how to get started tracing the problem. Never been good with the electrical stuff, I can't use the tride and true method of wacking it with a hammer until it fits.

Thanks,
Joel
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  #2  
Old 08-12-2002, 06:46 PM
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Joel,had same problem with my 300D try disassembling the light switch itself then clean the contacts up and re-assemble switch.Just be gentle prising the switch apart,hope this helps some.Bear
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  #3  
Old 08-12-2002, 07:25 PM
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Hi Joel!

A friend of mine had the same problem with his 1991 300E 4matic. Check your lisence plate lights too. If they are also out even with a change of bulbs, the problem would be deeper in the harness that goes in the left trunk hinge.

Not an easy ask but I found 3 broken wires. All I did was to splice them back, and all the lights started working.

Or it may be something simple as a corroded connection....

Bernie
1986 190E 2.3-16
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  #4  
Old 08-12-2002, 09:52 PM
1992300e
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Thanks

Thanks guys,

I'll get to it this weekend and post any results.

Joel
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  #5  
Old 08-12-2002, 11:54 PM
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Boot camp

the problem may be simpler.
The wire runs around the hinge of the trunk.
Often the wires get weak and break due to the
constant bending.
Try grounding the circuit on a body part and see if the light works.
If it does, then splice a new ground wire before the
harness bend at the trunk (boot) lid hinge

Good Luck.
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1979 300D 199 K miles
1995 C280 95 K miles
1992 Cadillac Eldorado Touring Coupe 57K miles
********************
1979 240D 140Kmiles (bought for parents) *SOLD.
SAN FRANCISCO/(*San Diego)
1989 300SE 148 K miles *SOLD
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  #6  
Old 08-13-2002, 09:07 AM
1992300e
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Hi unkl300d

Thanks for the advice,

Quick question,

How would I:

"Try grounding the circuit on a body part and see if the light works. If it does, then splice a new ground wire before the harness bend at the trunk (boot) lid hinge"

I am really weak when it comes to electronics of any type. I am looking forward to tackling this problem and getting the better of it. Will give me confidence going forward.

I'd hate to think this little light can the better of me.

Thanks again,
Joel
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  #7  
Old 08-13-2002, 11:02 AM
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I highly recommend AGAINST trying the above. If you were to ground a wire connected to a 'hot' circuit, the very best you would do is add a blown fuse somewhere to the list of problems.

Just follow the suggestions of looking for a broken wire. Note that under any conditions where a light SHOULD be on, that circuit should also have power and can accidentally be shorted out.

Steve
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  #8  
Old 08-13-2002, 11:31 AM
1992300e
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Thanks

Thanks Steve,
Joel
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  #9  
Old 08-15-2002, 02:30 AM
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Location: San Francisco, Ca
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The idea is to identify the ground wire FIRST and work from there.
If you are not sure , let somebody who knows do it.
I had success with my 300SE trunk light.
Just an option for your convenience.

(get color codes for your car or use a multi-meter.)
__________________
1979 300D 199 K miles
1995 C280 95 K miles
1992 Cadillac Eldorado Touring Coupe 57K miles
********************
1979 240D 140Kmiles (bought for parents) *SOLD.
SAN FRANCISCO/(*San Diego)
1989 300SE 148 K miles *SOLD
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