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#1
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Weird electrical/gauge problem - need help
I removed the instrument cluster from my 1984 300SD this afternoon to re-route the line for the pressure gauge. In the process, the yellow/red +12 volt wire grounded out, but the fuse did not blow.
I replaced the panel, but the gauges are not working. The fuel gauge maxes out, but I only 1/2 a tank of fuel. The coolant temp gauge rises up to about 50 (the engine is cold), but turning on the high beams maxes it out. The oil pressure gauge maxes out at 1 bar (it's always 3 on a cold engine). The tach maxes out at 500 rpm. I have the wiring chart in front of me and have checked the wires until I'm blue. I'm out of ideas. Does anyone have an ideas? |
#2
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Sounds like a pc circuit board prob.
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1981 300D 147k 1998 VW Jetta Tdi 320k 2001 Dodge Ram 2500 141k 1979 300D 234k (sold) 1984 300D "Astor" 262k(sold) Mercedes How-To and Repair Pictorials I love the smell of diesel smoke in my hair |
#3
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Good suggestion.
I replaced the oil pres/fuel gauge/colant temp with one of 2 spares I have, and none of them work. |
#4
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maybe you replaced the big rounded connector wrong? just a thought, coz the tab which prevents you from orienting it wrong fell off on mine, have to eyeball it everytime.
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85 190E 2.3(SOLD) 86 230E (-->300D) sold 87 300D (-->300TD) sold 68 250S w/ a 615 and manual tranny (RIP) 87 300TD (SOLD) 95 S280 "The KRAKEN" (Turbo 2.9 602 transplant) traded 86 190E 2.3... current project |
#5
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Actually, the speedo was dead. I replaced it with the 120 mph speedo and everything works. Now I need to find another 160mph speedo.
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#6
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Quote:
Thanks! |
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