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#1
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1987 300TD Electrical Problem...
Have encountered an electrical problem with my 300TD that may have it's roots in a problem I've had for a couple years...
For about the last two years, the exterior lamp failure dash light has been illuminating the instant I turn my parking lights on. I have checked outside countless times and there were not any exterior lights blown. Fast forward to a week ago- the dash cluster nighttime illumination lights stopped working. Initially I thought the rheostat was broken. Then I noticed the right side front and rear marker lights AND the headlight wipers had stopped working. Aha!...must be a fuse...lo and behold the #3 fuse was blown. I replace it and confirm the dash cluster and side marker lights work properly...for about 10 seconds...and the fuse blows again. I replace the fuse a second time, and this time it blows immediately with a flash. Is there a relay in the lamp monitor system somewhere that could possibly be causing ALL these problems?? J.G. |
#2
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I had a similar issue on my SDL. The wiper motor on the right hand side was the issue, there's a control circuit that pukes in it and causes a dead short. Insta-blows the fuse, which is annoying because it takes out the marker lights! I unplugged the wiper motor on that side and haven't had a problem since.
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Current stable: 1995 E320 149K (Nancy) 1983 500SL 120K (SLoL) Black Sheep: 1985 524TD 167K (TotalDumpster™) Gone but not forgotten: 1986 300SDL (RIP) 1991 350SD 1991 560SEL 1990 560SEL 1986 500SEL Euro (Rusted to nothing at 47K!) |
#3
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Hopefully it's a seized electrical motor, but it's possible you have a short to ground. Look around areas of HEAT, VIBRATION and METAL contact. Sometimes wires will short out through a routing hole with a missing or non existent grommet.
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1998 Ford Escort ZX2 5 speed - 279,000 miles My Daily 1992 Mercedes 300D 2.5 202,000 - Pure junk 2000 Mercedes E320 Black - 136,000 miles - Needs repair Don't forget to grease the screw and threads on the spring compressor. |
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