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#1
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HELP mysterious power drain
Any help apreciated. The 85 SD has developed a power drain that will take the battery dead in about 5-8 hours. So far I have narrowed it down to circut 13 in the fuse box. Read the cryptic box lid not alot of help. So, anybody have ideas? Thank You all.
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87 300SDL 220K 85 300SD 218K 82 diesel Chevette 440K 85 subaru 4WD turbo 83 4.1L buick powered cutlass THE TOY |
#2
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Fuse 13 is for hazards, clock, radio and door locks. The only high amps item in the bunch is the door lock pump unless there's a mjor short in the other items. Maybe the pump is stuck on. I believe it's in the spare tire well in your car. Disconnect the electrical connections and see if the drain goes away.
Sixto 91 300SE 87 300SDL 83 300SD |
#3
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Don't ignore the battery itself. A short inside the battery grid can drain the battery in just a few hours. It will act like something is draining it down.
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#4
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zbenz
Something I heard somewhere way back when, anyway try disconnecting the clock, there is one "slip together" connection if you can reach back up under the dash, don't know if there is enough room. You would have to wrap the end of the wire to protect it from shorting as it will, of course, be hot and make sure its dead while disconnecting. I remember something about the clock causing a "flat battery", might be worth a look see. Good Luck
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1985 Euro 240D 5 spd 140K 1979 240D 5 spd, 40K on engine rebuild 1994 Dodge/Cummins, 5 spd, 121K 1964 Allice Chalmers D15 tractor 2014 Kubota L3800 tractor 1964 VW bug "Lifes too short to drive a boring car" |
#5
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New revelation
New information, the first time this car was jumped the person jumping it put the cables on backward. What is the most likely problem caused?
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87 300SDL 220K 85 300SD 218K 82 diesel Chevette 440K 85 subaru 4WD turbo 83 4.1L buick powered cutlass THE TOY |
#6
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Blown diodes in he alternator is a possibility.
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Palangi 2004 C240 Wagon 203.261 Baby Benz 2008 ML320 CDI Highway Cruiser 2006 Toyota Prius, Saving the Planet @ 48 mpg 2000 F-150, Destroying the Planet @ 20 mpg TRUMP .......... WHITEHOUSE HILLARY .........JAILHOUSE BERNIE .......... NUTHOUSE 0BAMA .......... OUTHOUSE |
#7
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If that blew the diodes you would lose all or most of the charge output from the alternator. Quick way to test that is to hook a volt/ohmeter to your battery terminals. Check the voltage before starting. Should be around 11.8. Then start the car. With lights on it should read around 13.5. It can read higher, up to around 14.4, if your alternator is in good shape.
If the reading is no better than the low 13's with the car running you need to check further. Not nessecarily the alternator though. It can sometimes be a bad conntection from the alternator. Those can get dirty and foul up you charge. |
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