PeachParts Mercedes-Benz Forum - View Single Post - 83 300sd Brake Lights Blown Fuse help please

JamesDean · #2 03-14-2012, 02:18 PM

Quote:

Originally Posted by ShadeTree300SD

Well, what to do, what to do! What is the FSM? The fuse box cover in this car says nothing about Anti Lock Brake System or Anti Theft Alarm System. There is some what appears to be some aftermarket alarm system stuff under there. I wonder if this might be an issue? I wonder if a guy could disconnect all that stuff? Am I at the spot where I have to take it to someone? I'd rather not of course!!

The FSM = factory service manual.

Its free from Mercedes now:
Untitled Document

They didnt put ABS on until 1985 so you wouldnt have that, I dont think you'd have the alarm either. But if someone added something, I would suspect that immediately. You should disconnect the power line going the after market stuff, perhaps that is the problem.

Disconnecting the brake lights only alleviated 3.5 amps from the circuit. When you hit the brakes adding 3.5 amps put it over the 8amp fuse's limit.

So something else is on that circuit drawing more than the factory intended.