Electrical fuse box

KAINE GAUDERN

MEMBER
1986 MERCEDES BENZ 300SD
3.0L
6 CYL
TURBO
RWD
AUTOMATIC
368,225 MILES

Three of the main 30 amp fuses that control the powered accessories including power windows, power seats, and power windows are not getting the voltage they need to function. I have to lay a wire across all the terminals to draw enough power to adjust seats and mirrors and stuff like that. I was wondering if anyone had any experience and could help diagnose this issue.

1 Reply

KEN L

MASTER CERTIFIED MECHANIC
43,047 POSTS

Hello Kaine,

I would start by testing for power with a test light at one or more of the relays in the panel, next check the ignition switch feed because they ha problems with those in this car, here is a diagram of the fuse panel. Here is a diagram and some articles to get you started,

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester

Let me know what you find

Best, Ken

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Electrical fuse box

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