I have looked and looked and looked and for the life of me can't find the 'strip fuse' for the blower motor I don't have power to the #8 fuse but when I jump it over from #9 or #7 the blower motor works something fierce can someone help me locate this thing I feel like I'm going crazy thanks in advance

-Chadd

The power for the fuse comes from the key switch. When mine went bad i replaced the key switch and installed a relay to handle the load instead of the key switch. I think this was a mercedes modification.

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1983 300DT 401,200 + Miles

What model is this car?

What climate control system does it have?

I am not aware of the w123 models having a strip fuse for the blower...

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The hvac system is all cables it is a 1981 240d

Hmm in 81 the blower was on a 16 amp fuse. if the blower has bad or dirty bearings, the fuse can fail. I'd pull the blower, clean and lube the bearings, and reassemble, then pull the fuse, and clean the contacts for it. then replace the fuse with a new ceramic fuse with copper or tinned brass element.

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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!

The fuse is good I don't have power on either side of it

ahh... no power TO the fuse... perhaps there is a relay? or like mentioned above, the keyswitch is damaged?

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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!

F8 fuse is fed from its own contact on the key switch. Live only in Position II.

I doubt the live side from the battery is bad as this same contact set carries the start command when the key is in position III.

Terminal 15x on the key switch. Red/yellow wire.

On a 240D fuse #5 is unused. If the points on #8 are burnt you can transfer the wires on the back of the fuse panel from #8 to #5.

There is a fix out there that uses a Bosch motor meant for a Volvo. The motor fits with minor modification and is cheaper than the MB motor.

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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