The numbers are standard euro terminal numbers on the relays.
Same as the numbers on the ones in mercedes service manual.
30= + power
85 + 86 are the coil connections. I don't think it matters
which is grnd and which is the + signal from the car's lights.
87 is NC
87a is NO
The power from 30 feeds to 87a and 87 depending on if the coil is
energized or not. What I like about this is if the trailer's
lights have a short then it just blows the fuses on either the
power line to 30 or on the light circuits.
Thanks,
Manfred
Date: Thu, 8 Nov 2012 08:26:40 -0700
From: Craig <diese...@pisquared.net>
Subject: Re: [MBZ] 240D tow hitch or wagon?
On Wed, 07 Nov 2012 23:47:51 -0500 MG <trainpain2...@yahoo.com>
wrote:
> I couldn't figure out how to pass the blinker signal through to
> the trailer and at the same time send the brake signal through to
> the other light without using a relay for each brake light signal
> and one for each blinker signal. I attached a quick pic of what I
> figured out.
>
> Could you do me a quick drawing of how to hook up the three
> relays to do that.
Sure. Give me a little time to do it.
BTW, do you have an explanation of the various terminal numbers:
30
85
86
87
87a
?
I.e., which ones are coil1, coil2, common (moving) contact,
normally open
and normally closed? I don't have that information available
right now.
Craig
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