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#1
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AC and Speedometer Help?
OK, I have recently purchased a near flawless 86 300 SDL. I love it, but of course there are a few issues. If anyone could help it would be much appreciated.
1. My AC seems to not want to work. The fan motor works (it kicks on when I turn the key to let the glow plugs warm up), but it does not come on when I start the car consistently. When it does come on, it comes out of the vents near the windshield for a while. The dealership claims it is the fan motor. Any thoughts? 2. I noticed this morning while driving in the rain that the speedometer jumps around quite a bit as the car is shifting gears between 1 and 3 giear. It also seems less sensitive at the bottom of the range as it drops to zero when I am still going 10 MPH. 3. I know this is not in the title, but I wanted to ask any way. Is there a wiring diagram for the 300 SDL? I need to change out the radio. I have a new head unit on the way, but I haven't the foggiest idea how to wire it. Thanks so much. |
#2
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1. Wiggle your key slightly with AC on and car running. See if that makes the fan come on.
2. You will soon need to replace a plastic gear in your electronic speedo. You are getting "the warning sign"
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BENZ THERE DONE THAThttp://www.peachparts.com/shopforum/...c/progress.gif 15 VW Passat TDI 00 E420 98 E300 DT 97 E420 Donor Car - NEED PARTS? PM ME! 97 S500 97 E300D 86 Holden Jackaroo Turbo D 86 300SDL (o\|/o) |
#3
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Is there a write up on the plastic gear replacement?
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#4
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go to odometergears.com
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BENZ THERE DONE THAThttp://www.peachparts.com/shopforum/...c/progress.gif 15 VW Passat TDI 00 E420 98 E300 DT 97 E420 Donor Car - NEED PARTS? PM ME! 97 S500 97 E300D 86 Holden Jackaroo Turbo D 86 300SDL (o\|/o) |
#5
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Wait a minute, we're talking about a 300SDL which should have an electronic speedometer. A combination of funky electronic things like you've described here is often attributable to low output from the alternator or a bad overvoltage protection relay. Search for overvoltage protection and you'll find a wealth of info.
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Rick Miley 2014 Tesla Model S 2018 Tesla Model 3 2017 Nissan LEAF Former MB: 99 E300, 86 190E 2.3, 87 300E, 80 240D, 82 204D Euro Chain Elongation References |
#6
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Thanks, I will check out the OVP when I get home. I wondered about the dealer and the fan motor; it seemed to easy.
Oh, and TX I used to live in Ridgeland (not to far from you). What a wonderful place to live. |
#7
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if you say so!
__________________
BENZ THERE DONE THAThttp://www.peachparts.com/shopforum/...c/progress.gif 15 VW Passat TDI 00 E420 98 E300 DT 97 E420 Donor Car - NEED PARTS? PM ME! 97 S500 97 E300D 86 Holden Jackaroo Turbo D 86 300SDL (o\|/o) |
#8
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I was just being nice.
Kind of dull really, but I have also lived in Detroit. It is all about perspective I guess. |
#9
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Man, this keeps getting wierder.
So now the AC works perfectly. We cooled down quite a bit the last few days so the only thing I can come up with is that the AC problem is somehow heat related? Go figure... So, what Am I looking for in the OVP? I still think this is electrical. Should I have the dealer test it? I really don't have any sort of electrical tools for testing lying around (other than a tester light). |
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