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#1
09-27-2018, 12:31 AM
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X18 Connector
G'day from the Land Down Under.
An electrical problem with a W124 300CE. I have been unable to find even a mention of the connectors involved, so here is a post on the subject. The only wiring diagrams to which I have access are for USA models an the wiring in my Aussie unit is different. So this makes finding the short to ground in the 8 amp circuit from Fuse C a bit tricky. The USA manual tells me that for the W125 050, its circuit is distributed from Connnector X30, but from inspection, I am pretty sure that its from connector X!8, located just above the drivers knees. If I unplug it, I believe I can access each outgoing circuit and determine in which one the short has developed. But I am unable to find instructions on how to uncouple this connector. Anybody know please? And if it is considered that I should perhaps not be frigging with this, please look up my post now several years old on the KE Jetronic system, under my name of Megawatt Man. It'll be OK. 
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#2
09-27-2018, 10:09 AM
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What does Fuse C feed on your car? Is it the same circuit as the USA drawing you're following?
__________________
Current stable: 1995 E320 157K (Nancy) 1983 500SL 125K (SLoL) Gone but not forgotten: 1986 300SDL (RIP) 1991 350SD 1991 560SEL 1990 560SEL 1986 500SEL Euro (Rusted to nothing at 47K!) Gone and wanting to forget: 1985 524TD 167K (TotalDumpster™) [Definitely NOT a Benz]
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#3
09-27-2018, 11:39 AM
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MM:
1) As asked above, "What equipment is on the circuit supplied via Fuse C?" 2) Connector X18 typically is in the interior/tail lamp circuits. In LHD cars it is located above the left footwell. Is your RHD wiring a mirror image of LHD? X18 is a 12-pin connector; the two sections can be separated at the center seam by prying with thin screwdriver blades. 3) X30 is a connector for special equipment.
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#4
09-27-2018, 05:30 PM
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X18 Connector
Thank you all for your replies. Fuse C supplies several but not all of he facilities shown by the USA diagrams. First port of call on thse digrams is the automatic antenna, but on my car that is the end of the circuit. in trying to isolate this fault, I have disconnected the faulted circuit at those points that I know is affected and tried to track its route with only partial success. Hence my desire to secure a diagram of the Aussie arrangment. I can see the red/yellow cable entering and leaving X18 where the conductors enter the plug, but as one can see in many posts, I don't want to go in too heavy handed and break something. I guess the advice re fine screwdrivers means that although the top view of the connector is qite different to most other plug connectors in Mercs, it really does separate between male and female parts so he screwdrivers would be inserted horizontally into the separation, that I cannot really see? Warwick
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#5
09-27-2018, 05:37 PM
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and yes, things are arranged mirror image wise Warwick
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#6
09-28-2018, 09:13 PM
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X18 Connector
Yes, Fine screwdrivers do indeed separate the male and female parts of the connector. Unfortunately at the moment, I am unable to figure out how to make some space in there. The Female part lifted clear and can be moved upwards only just enough to clear the pins, while the male part remains stationary, seemingly forming part of a rigid support, maybe even a part of the fuse box housing. Fortunately though, the short circuit was disconnected from the fuse box, proving that this cable does indeed emanate from X18. More work to go. Thanks, Warwick Megawatt Man
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