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#1
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1980 300SD - All Electricals Quit Today
Aloha,
I was driving along and everything was fine... radio playing, a/c blowing, turn signals working, windows going up and down, etc. Then, the radio stops, and shortly after that the a/c stops blowing. I go to put the windows down, and they go down, but very slowly. So I pull into a shady spot, pop the hood, and check the fuses. Everything looks good. I go to start the car, and it's completely dead - no turning over, no lights on the dash, nothing. I get a jump from someone nearby, and the car starts up right away, but still, none of the electricals work... no turn signals, no radio, no a'c, no window motors, nothing. When I get home, with the car still rinning, I connect the battery charger. All of the electricals come back on. I disconnect the charger, and all of themm go off again. Can anyone help? Thanks.
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Ray 1980 300SD (Anthrcite Gray) 253,108 miles 1982 300SD (Silver Blue) 242,398 miles 1982 300SD (Black) 263,185 miles |
#2
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I know somebody here can be more accurate.
But your test tells me a few things. The engine needs no electricity to run. It would seem the battery has been drained to nothing. The batery may still be good, and if you were to charge it completely probably would get a couple days out of it. I know this because recently I was having trouble and could go three days on a charge before total dead. My theory is electricity is not making it from the alternator to the battery. Several possibilities. From easiest to worst: 1. Voltage regulator on back of alternator needs to be replaced. (not sure how to test for this). 2. Alternator needs complete replacement. 3. Wires from alternator back to battery is bad. Tell us how many miles (if it is not in your signature) and if any of these parts have been replaced - alternator, voltage regulator. Anything else you can think of. If you are lucky it is no more than an alternator. Charge it up and see if it acts normal. That would be a good indication that you need only repair the charging system.
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80 300D 340K Owned 30 yrs 83 300SD 440K Owned 9 yrs - Daily Driver 150mi/day 02 Z71 Suburban 117,000 15 Toyota Prius 2600 miles 00 Harley Sportster 24k 09 Yamaha R6 03 Ninja 250 |
#3
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Alternator, the alternator quit and while you were driving with blower on radio you drained out the power in the battery causing the electrical stuff to not work. Your engine don't use any electricity while running, only time power is used in the engine compartment is when your glow plug is warming up. This is one great thing about old diesel engines, you can still drive even theres no power.
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Current Garage 2008 Mercedes GL320 CDI 188k mi Repair/Work in progress 1994 S350 160k mi Garage Queen & prepping for repairs 2005 E320 CDI 203k mi Healthy & Daily Driver 1994 S350 357k mi Retried as parts car 1984 300TD 214k mi Blown OM617 Poss OM603 Swap?? Sold 1987 300SDL 200K+ 1994 S320 181K mi 2008 E320 Bluetec 127k mi 1999 S420 130K mi 1980 240D 360k mi 15+ Others that has come, stay and gone GONE, BUT NOT FORGOTTEN 1995 E320 SE 220k mi 1984 300SD 350k mi |
#4
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Check for loose fan belt first of all. You should not be able to turn the alternators fan by hand. I suspect this if the red light on the dash was not lit showing no charging.
On the otherhand a fault may have developed in a fashion the alternator light did not activate. |
#5
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Many thanks to all!
Went after the voltage regulator first. Very easy job - took one minute, if that. The two pins were so worn that they were almost invisible. Called the parts store... they had one in stock (which is a big deal in my little town). Bought it, brought it home, installed it, test drove the car, everything is now working perfectly. Praise the Lord! Aloha!
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Ray 1980 300SD (Anthrcite Gray) 253,108 miles 1982 300SD (Silver Blue) 242,398 miles 1982 300SD (Black) 263,185 miles |
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