Date registered: Sep 2013
Vehicle: 1963 230SL & 1972 280C (sold sadly) & 1973 280C
Location: Portland, OR
Mentioned: 0 Post(s)
Quoted: 11 Post(s)
$3 turn signal / hazard relay repair (aka "hack")
So in my recent post asking for 114 "doo dads" (technical term) such as some black fabric press on stuff for the door jamb and/or the little chrome trim ring behind the brake release knob (still hoping for either btw) for my 280c i happened to mention that i recently lost my flashers. At first the forum posts suggested it might be my (1973) style push button hazard switch. I got a new one. It wasn't.
That only left the relay. The bosch one that is direcly under the leg shield cardboard (right below the hood release lever).
New part is $60 minimum. MikeD told me you can wire up a 552/536 generic relay for about $3. So i decided to try. He suggested bullet connectors. I bet those would work, but I didn't have any in a bin full of hundreds of spade connectors. Odd. So I reasoned that the old bosch connectors could easily be re-used wile sacrificing the rest of the Bosch flasher relay. This is NOT ROCKET SCIENCE. And I am not the first person to do this. Just sharing for future people to find this: Buy a $3 552 or 552/536 (i got one off amazon for $2 and change.) wire it to the two pins 49 and 49a. If you guess wrong, flip it. And if you're like me and want to use the bosch connector instead of bullets snip it apart and solder into it (there are holes in the circuit board that facilitate this).... see attached pic. And hope this saves many future $1000's of dollars.
*thanks MikeD for the tip*