No sir, you did not. The large blue terminator is really (and should be marked) your lamp controller. Should be made by Hella... This box does the same job the "bulb failure warning relay" used to do for the 200 and 700 series. Instead of being electromechanical in nature, this device measures the voltage on either side of a low-ohm resistor (one for each bulb), and if the voltages are the same it lights up the "Bulb Failure" warning on the dash.

Where the problem comes in, is when Gohmer traces from the tip of the brake line, and hooks in to that wire, he's doing it *after* that resistor, which will tend to burn up under the increased current. This means you have a brake light that won't light until you replace that box.

Here's what I would do... I would get three high amp SPST relays from your favorite electronics parts store... Radio shack sells one specifically for automotive use, has 4 connectors on it. I would run one wire (preferably red) from the fusebox to the tail end carrying +12v... that will actually power the tail lights.

Name the relays PARK, LEFT, and RIGHT. Park's coil will run from ground to the 58A wire on the box. One coil pin from LEFT and RIGHT will go to 54 on the box. The other coil pins will connect to the tip of the respective turnsignal. All three relays will have one side of the throw connected to the +12v wire you established earlier. The other side of the throw will connect as follows: PARK - Park line. LEFT - Left turn/stop. RIGHT - Right turn/stop.

I'd stuff the relays under the floor, in the little side pocket. In a sedan, I'd hide it with the tail lights. Hope this helps.
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89 764 GLE 150k/ 86 745 GLE 240k