Quote:
Originally Posted by Demothen
Are you planning on wiring one of those in series with the resistor pack? If so, you need to actually get a full 12v signal to your new regulator or it's not really going to work well. You probably need to at least bypass the resistor pack.
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In short, no. If I use the Porsche resistor, I'll wire it in the way the Mercedes resistor is wired. The more I think about it, the less likely I am to go this route.
If I use the DC motor controller I ordered, I'll disconnect the factory stuff and run new wires (fused appropriately) straight from the battery to the DC controller and from there to the blower unit. In that case, I'll most likely leave the old switch (not opening up my console again) and the old resistor in place.
In fact, I'm as-of-yet unable to determine whether or not I can even access the existing Mercedes resistor pack without completely disassembling the dashboard.
Quote:
Originally Posted by Demothen
Have you tested the resistor or checked to see what voltages you are getting at the fan? I am not familiar with the late 240d, which generation climate control do you have?
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I haven't tested anything yet, although I did jumper the new fan straight to a battery (it went on to full speed and ran quietly), so I know the fan itself isn't the issue. Plus, it works at low speed. That leaves the resistor and the switch as suspects. I'm leaning toward the resistor.
I ordered parts so that I can (hopefully) take a look at this over the long weekend. I wanted parts in hand so that I could fix this right away once I do a little more exploratory surgery.
06-30-2016, 04:05 PM
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