You guys have been a tremendous help so far. Here is the last little irritation I have and on my 89 190E 2.6 then she will be good to go. The Security system horn does not work. The lights flash OK and all the other things that are connected to the system works as advertised, but the horn wont sound when the alarm is activated. I replaced the horn with a new one, but I am finding out that there is no voltage coming up on the black/yellow wire that feeds the horn. The brown wire is grounded OK as verified by a multimeter, buy no voltage on the hot wire. Is there a relay that powers the horn only? When I look on the wiring diagram, all I see is that the wire is connected to the N26 bus, but no relay. Where is this N26 bus and am I missing something? Oh, BTW, anyone interested in a 83 240D?

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83 W123 240D
76 300D, "Lil Yellow Car"
1978 Cessna 172N 180 HP Mod

"If life ain't fun, I'm not interested"

The important things are those that you learn after you know it all.
Chip Foose

Build a better mousetrap and you will REALLY infuriate corporate america.