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Old 10-24-2021, 11:17 AM   #1
fatcatbestcat
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Default -85 240 Headlight Conversion: Trivial or Terrible?

Content warning: novice 240 owner with novice questions (again).

I have an '83 240 diesel, for which I'm already in the process of taking most of the front end off (to fix some diesel-related stuff). It's a square sealed beam car originally, but I like the look of the 'spider eye' round lights. I managed to snag a set of bezels and headlight mounts (?) recently from a 264.



They seem to be direct fit (apart from needing round lamps, obviously), but how different are the connectors for the lamps? Is it a big deal to change them, or is this going to be another 'ruin my car for no reason' project?

Feel free to move this thread if I put it in the wrong subforum.
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Old 10-24-2021, 11:21 AM   #2
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The connector plugs or lack thereof changed over the years so you might have to splice them in directly if you're missing plug ends.
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Old 10-24-2021, 05:58 PM   #3
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There is usually a short wiring harness to the headlights that comes from a connector near the fender. If you get those short wiring harnesses. Then it's all plug and play. Otherwise you need to swap two wires on the high/low connector to use the harness for the rectangle lights. The rest is all bolt on.
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Old 10-24-2021, 07:38 PM   #4
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Quote:
Originally Posted by dl242gt View Post
There is usually a short wiring harness to the headlights that comes from a connector near the fender. If you get those short wiring harnesses. Then it's all plug and play. Otherwise you need to swap two wires on the high/low connector to use the harness for the rectangle lights. The rest is all bolt on.


Quad square to quad round the wiring should be the same.
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Old 10-24-2021, 07:56 PM   #5
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You can still buy Hella H1 and H4 e-code conversion kits (amazon: "Hella 5 3/4" conversion"), which are a nice upgrade. If you add these, you'll want to add a headlight relay http://forums.turbobricks.com/showthread.php?t=250740, and will need to swap a couple wires on the H1 connectors.
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Old 10-24-2021, 09:21 PM   #6
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Consider the wagonmeister harnesses, Very happy with 3 I have
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Old 10-24-2021, 10:54 PM   #7
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Thanks for the input, guys. Next chance I get, I'll take the square lights out and see what the connectors look like. Hopefully it's those easy little short ones. I get that HIDs are a big visibility upgrade, but I might take the easy route and just run regular round sealed-beams if I can.
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Old 10-24-2021, 10:57 PM   #8
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It'll be plug and play if you stick to the sealed beams.
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Old 10-24-2021, 11:00 PM   #9
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It'll be plug and play if you stick to the sealed beams.
Excellent. Inferior visibility gang.
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Old 10-25-2021, 03:21 PM   #10
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^Not so. 4x6 rectangular headlamps are wired differently. The 5.75" roundies are wired like H4 headlamp bulbs, which is also how the 7" rounds are wired. See pic below...



Photo is of a 4x6 harness repinned for the correct H4 and 5.75" round configuration. With the sideways terminal at the top and while looking at the back of the plug, you want black wire on the left, red at the top, and blue at the right.

-J
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Old 10-25-2021, 04:21 PM   #11
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This would be a good excuse to rewire and relay the headlights. Chances are your headlight wiring is decomposing anyways.
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