Ethelred (the Unready: 1982 380 SL) has got innumerable issues to deal with, but one that's the most in-your-face irritating is the seatbelt warning light that cycles with nearly every bump. So I pulled the warning module (next to the cruise control amplifier hanging from the brake pedal support) and resoldered it.
I also retightened the ground cluster over by the fuse box. That is also part of the warning circuitry. OK, this is weird. I've wondered why opening the right-hand door causes the warning buzzer to sound on this car, but not on our later SL's nor on our now-sold 450 SL, and I can see from the car's schematic that though they wired the two door switches separately to the warning module they also tied the two switches together, negating the diode that's in the warning module to isolate them! Later SL's have them separated. I wonder... I pulled the two door switches, and the wiring found there matched the schematic, as did the wiring to the courtesy lights themselves. (It's always good to check.) It looked like one of the two brown/blue wires that comes off each switch is just a tie between the two switches, one that isn't necessary and that was eliminated for the 1983 model. Gambling, I cut one loose from the driver's switch and beat the odds! It was the inter-switch tie and after that the warning module only buzzed when the driver's door was opened yet the courtesy lights functioned as they should. I taped up the loose wire and put the car back together. -- Jim _______________________________________ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
