SL/R129: 1990 roll bar issue
Thread Starter
Newbie
Joined: Sep 2016
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1990 500sl, 1992 300sl
1990 roll bar issue
I am new to the r129 and have an issue maybe someone has come across before
roll bar works fine with the switch
rollbar lifts and lowers during top operation
roll bar light on switch blinks and roll bar light in instrument panel is on
if I connect the ( what I think) is the solendoid with the wire shown disconnected in the picture the solenoid at the top gets REALLY hot
the ram appears to move quite smoothly
any ideas are appreciated!
TIA
Karlr
roll bar works fine with the switch
rollbar lifts and lowers during top operation
roll bar light on switch blinks and roll bar light in instrument panel is on
if I connect the ( what I think) is the solendoid with the wire shown disconnected in the picture the solenoid at the top gets REALLY hot
the ram appears to move quite smoothly
any ideas are appreciated!
TIA
Karlr
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Joined: Jan 2006
Posts: 1,982
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From: Atlanta, unfortunately
'09 S600, (2) R129 300SLs, '03 SL500, '03 SL55
To read a code from the roll bar controller on an early R129 you short diagnostic socket #7 to chassis ground for 2-4 seconds and count the flashes of the roll bar malfunction lamp in the instrument cluster. After reading a code I suggest you erase it by shorting socket #7 again for 6-8 seconds.
The procedure for reading and erasing top controller codes is the same as for the roll bar except that the socket you short is #10, and the flashes you count are that of the top control switch.
You can look-up the meaning of whatever codes you find in the appropriate diagnostic manuals available here.
The location of the diagnostic sockets is mentioned in this current thread.
Thread Starter
Newbie
Joined: Sep 2016
Posts: 3
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1990 500sl, 1992 300sl
excellent info
I get the DTC 6
Roll bar deployment solenoid
now - when I connect the wires to the solenoid it gets REALLY hot
the question is: is the solenoid dead or the controller controlling the solenoid dead!
thanks again
I get the DTC 6
Roll bar deployment solenoid
now - when I connect the wires to the solenoid it gets REALLY hot
the question is: is the solenoid dead or the controller controlling the solenoid dead!
thanks again
Banned
Joined: Jan 2006
Posts: 1,982
Likes: 393
From: Atlanta, unfortunately
'09 S600, (2) R129 300SLs, '03 SL500, '03 SL55
