1972 300SEL 4.5 fuse #1 dead short, help! - Mercedes-Benz Forum

 
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post #1 of 3 (permalink) Old 12-17-2011, 10:59 PM Thread Starter
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Date registered: Aug 2006
Vehicle: 1972 300SEL 4.5, 1971 Citroen DS21, 1995 Jaguar XJS
Location: LA, CA
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1972 300SEL 4.5 fuse #1 dead short, help!

Hi,

Maybe someone can help with this weird electrical problem. OR I need a wiring diagram... can someone send??

Fuse #1 blows instantly when installed, so there is a dead short in #1 circuit (interior lights, clock, cigar lighter etc)

hazards only energize when light switch is in park or headlight on positions... and then only flash once or twice. turn signal flasher is bad but signals flash with a new flasher installed..

when light switch is turned to park or headlights, the right side turn signal comes on (and the dash indicator for it)

I think there's a short between the right side blinker and the parking light circuit, but I don't know where...

Any idea where I should look first? Don't want to get the inductive short finder tool, but I will if that is the only way...

thanks!

Joe
LA,CA
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post #2 of 3 (permalink) Old 12-21-2011, 05:59 AM
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Date registered: Jan 2006
Vehicle: 73 280SE 4.5, 71 300SEL, 03 BMW Z4, 72 Fiat 850, 80 Triumph TR7, 85 Porsche 911
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Ugh, you've got some wires crossed somewhere. I hate to be less than helpful, but look through the loom for wires fused together, or someone's attempt at rewiring stuff.

See the online resources portion of this forum - there's a wiring diagram posted for the 280SE 4.5. Aside from the length and trim of your car and a 280, there's no difference electrically.
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post #3 of 3 (permalink) Old 12-21-2011, 03:38 PM Thread Starter
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Date registered: Aug 2006
Vehicle: 1972 300SEL 4.5, 1971 Citroen DS21, 1995 Jaguar XJS
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Thanks Grubeguy. found the wiring diagram. I'll post results.

Last edited by tcb323; 12-21-2011 at 05:17 PM.
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