I installed a new voltage regulator on my 300D yesterday. I was getting about 12.8V Now it is close to 14v.

When reconnecting the battery I got a fairly decent spark. I double checked all the circuits and they seemed off.

Went and checked the fuse box and almost all of the current was in circuit 2. which included the radio and clock.

I didn't check the amperage but it was decent from looking at the spark that it gave off. The better part of an amp or two I am sure.

My factory clock doesn't work.

Has anyone had a similar current loss on circuit 2 of the fuse box.
Thanks.

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85 Merc 300D - Unwinding 31 years of wear
86 VW TD
Mahindra Diesel
Iseki Diesel

In 2007 I didn't own a diesel.

IIRC the dome/trunk lights are on fuse #2 in a 123.

Did you by chance have a door or the trunk open at the time?

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The OM 642/722.9 powered family
Still going strong
2014 ML350 Bluetec (wife's DD)
2013 E350 Bluetec (my DD)

both my kids cars went to junkyard in 2023
2008 ML320 CDI (Older son’s DD) fatal transmission failure, water soaked/fried rear SAM, numerous other issues, just too far gone to save (165k miles)
2008 E320 Bluetec (Younger son's DD) injector failed open and diluted oil with diesel, spun main bearings (240k miles)

1998 E300DT sold to TimFreeh
1987 300TD sold to vstech

Was radio on?
I think the antenna is on fuse 2. Does it go up automatically when radio is turned on?
And then as Jay_Bob said, front/back courtesy plus trunk lights.

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Graham
85 300D,72 350SL, 98 E320, Outback 2.5

thanks for the advice. I had verified the trunk light and interior lights. the electric antenna has been disconnected

__________________
85 Merc 300D - Unwinding 31 years of wear
86 VW TD
Mahindra Diesel
Iseki Diesel

In 2007 I didn't own a diesel.