CAN junction block locations? (Water damage?)
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Joined: Apr 2014
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c63, 335i
CAN junction block locations? (Water damage?)
I'm having problems with my 2009 w204. No ac, no blinkers, brake light on, high beam light on, check engine on, no horn, srs light on. There has been water ingress in the cabin over the years.
I checked the front Sam -- absolutely no water ingress; circuit board and connectors look flawless.
Swapped 15r relay - issue persisted.
Cleaned the 3 can junction boxes to the left of the driver footwell because there was mild corrosion - issue went away during cleaning then returned days later. I think it was coincidence. I'm getting about 2.5v on each wire except one brown stripe one, which I'm assuming is a ground because it looks different than the others.
Are there any other can junctions in the interior that may be corroded? I'm really stumped here.
I checked the front Sam -- absolutely no water ingress; circuit board and connectors look flawless.
Swapped 15r relay - issue persisted.
Cleaned the 3 can junction boxes to the left of the driver footwell because there was mild corrosion - issue went away during cleaning then returned days later. I think it was coincidence. I'm getting about 2.5v on each wire except one brown stripe one, which I'm assuming is a ground because it looks different than the others.
Are there any other can junctions in the interior that may be corroded? I'm really stumped here.
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W204 C200, BMW E30 M3, 1980Gt Mini, Toyota Corona, KTM 200 EXC.
Hi
I would go back to the 3 junction boxes re-clean then and see if any difference can be detected.
have a really good look up inside all the terminals for corrosion when you are finished apply some dielectric grease.
I would go back to the 3 junction boxes re-clean then and see if any difference can be detected.
have a really good look up inside all the terminals for corrosion when you are finished apply some dielectric grease.
Thread Starter
Member
Joined: Apr 2014
Posts: 196
Likes: 2
c63, 335i
I was considering steering column, but that wouldn't explain the ac not working
I'm hoping it's not the front Sam, because I don't have the means to program that myself
Last edited by tofu-; Aug 3, 2021 at 03:22 PM.
Thread Starter
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Joined: Apr 2014
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c63, 335i
Just a small update,
The distribution boxes fixed it. I took the old boxes apart for inspection, and I really didn't notice any more oxidation on them (they had been cleaned with deoxit), but they were still inoperable. So, if anyone is googling this issue -- although the distribution blocks may look clean and you have 2.5v on every wire, it's worth replacing them.
All fixed.
The distribution boxes fixed it. I took the old boxes apart for inspection, and I really didn't notice any more oxidation on them (they had been cleaned with deoxit), but they were still inoperable. So, if anyone is googling this issue -- although the distribution blocks may look clean and you have 2.5v on every wire, it's worth replacing them.
All fixed.
Thread Starter
Member
Joined: Apr 2014
Posts: 196
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c63, 335i
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Thread Starter
Member
Joined: Apr 2014
Posts: 196
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c63, 335i
And to add to the Google keyword list, I also had intermittent issues with starting the car. It would not crank unless I tried 3-4 times. Lastly, I also had an intense vibration during idle while in gear (not P or N) when the car wasn't warmed up. These issues all resolved.
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2008 Mercedes Benz C300 4matic
Just a small update,
The distribution boxes fixed it. I took the old boxes apart for inspection, and I really didn't notice any more oxidation on them (they had been cleaned with deoxit), but they were still inoperable. So, if anyone is googling this issue -- although the distribution blocks may look clean and you have 2.5v on every wire, it's worth replacing them.
All fixed.
The distribution boxes fixed it. I took the old boxes apart for inspection, and I really didn't notice any more oxidation on them (they had been cleaned with deoxit), but they were still inoperable. So, if anyone is googling this issue -- although the distribution blocks may look clean and you have 2.5v on every wire, it's worth replacing them.
All fixed.
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2015 SL400 (M276 Turbo), 2014 C350 Sport (M276 NA), 2004 SL500 (M113), 2004 Audi TT225 (BEA)
