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+--- Thread: w123 ignition tumbler electronics (/showthread.php?tid=4292)
w123 ignition tumbler electronics - larsalan - 01-25-2013
So, I've read plenty on failures of the tumbler to turn. Like it was mechanically fucked.
Today I was trying to start my car and it seems like the battery was dead. Ok, I guess I left the headlights on. There's supposed to be a warning buzzer for that shit. That buzzer and all the dash run on fuse #1.
Ok, so i put in a new battery, turn the key and the dashboard light are on. Starter wont crank.
Next, jumper cables to a prius(huge power). Now turn the key and dash lights aren't on. Full battery, fiddled with the #1 fuse.
Has anyone known of the key/switch to get electronically fucked up?
I will keep working on the fuse too.
weird shit here. I have been working over the fuses and shining up the connections.
So the radio wont come on nor will the fan for the hvac. But those say they're on the same fuse as like the cabin light, and that is on?
Also sunroof wont go nor will the windows.
These are all things that have to do with the switch in the tumbler.
Also, the horn wouldn't go and that should fire without the acc selection on the key.
WTF it is always something with this piece of shit. I bet it is some ice inside there fucking it all up.
RE: w123 ignition tumbler electronics - w123love - 01-25-2013
Maybe the tumbler. I had a similar fiasco. I replaced the positive terminal connection on the positive battery lead with an aftermarket one from autozone. Mine had been eaten away. (I had a brand new battery). I tried to start the car after, and I got some funky symptoms. Wouldn’t start, lights, blah blah blah. I felt like an ass when I had to towed to my mechanic and all he did was tighten the new terminal connection to the lead on the battery post. Everything was back to normal. I suggest checking things under the hood to make sure the lead is tight and you are getting 12v into the cabin.
RE: w123 ignition tumbler electronics - Simpler=Better - 01-25-2013
Check the clamps AT THE BATTERY. If that shit gets invisible corrosion it won't start at all.
RE: w123 ignition tumbler electronics - larsalan - 01-25-2013
Ok, so it's like the starter isint even resetting or whatever. IDK, you know how you turn the key to the 'start' position and there is some physical resistance against you.
Now there is none at all. And the key just turns freely.
hold on, hold on.
I am feeling super deja vu. I feel exactly as if this has happened here before and I was asking the exact same shit here at std. WTF, this is a strong feeling. Maybe it is just need to rest for a bit. We'll see.
ok, i am out there trying to take the wiring harness/plug out and it wont fucking come loose.
http://dieselgiant.com/repairignitionlock.htm
there's a picture of one there. Any idea why it wont come out? I am guessing my tumbler isint turning some mechanics to the #2 position as is required.
Also cannot remove that black collar it is welded on there or some shit
Got it, had to rip the plug in half. Now to try and figure out which way to put it back. There are 7 wires and it's like a triangular circle. 1/3 chance
RE: w123 ignition tumbler electronics - larsalan - 01-25-2013
So to sum it up...
The problem was in fact mechanical in nature. Inside that tumble/switch somewhere. The harness is intact and all of those electric features can be run with a jumper wire. Just trying to track down a used key/tumbler/thingy
RE: w123 ignition tumbler electronics - MFSuper90 - 01-26-2013
(01-25-2013, 04:03 PM)larsalan So to sum it up...
The problem was in fact mechanical in nature. Inside that tumble/switch somewhere. The harness is intact and all of those electric features can be run with a jumper wire. Just trying to track down a used key/tumbler/thingy
I have a used one, but I wouldn't sell it to you for the fact that I had trouble with the extra one I have. It would turn to accessory but not to start.
Im sure someone on here has an extra?
RE: w123 ignition tumbler electronics - larsalan - 01-26-2013
I was super lucky. I had met this guy a while ago at lowes.
He come up to me and was all like hey man I dig these cars and have got some junk ones, et cet.
Wrote down his phone #.
So I called him up yesterday and was like hey man 'im in a pickle...'
He was like $20, go out to my house and pull it off this front half of a w123/300d.
Totally stoked, back in business. My ignition had always been rough to turn and this one is way better.
From that dieselgiant how to page you'll see he says set the key in #2 position in order to pull out the wiring harness.
But my busted ignition had no way to turn to the #2 position at the back end, even though the key end would turn through the whole range.
The replacement had same part # and manufacturer but had a slightly different rear side. Hooked up just fine and works better than the old one ever did.
I wonder which part is next to break.
RE: w123 ignition tumbler electronics - rmd2k1 - 01-30-2013
I have had that happen with my 83 300sd. Something inside the tumbler gave out and was unable to start the car. Had to jump the wiring on that connector block to get into a safe area to be worked on. I ended up splicing a push button switch into the harness to be able to start the car.
This car has thrown me a few curve balls but its nothing some good ol engineering couldn't fix. Lol. I lost the glow plug controller about 2 months before the key tumbler lost its start position. A starter solenoid and a toggle switch fixed the glow plug relay problem.
By chance is that guy you got that part from in the southern Indiana area. In all reality I'm roughly an hour east of where you are larsalan.
RE: w123 ignition tumbler electronics - larsalan - 01-30-2013
His home was actually to the west of where I'm at. Somewhere down a hick road in whitehall I believe. There were like 10 cars out there but more bmw than benz.