why would I have low voltage on power side of fuse 2 whether key is on or off on 1992 400e

Asked by Apr 18, 2017 at 02:44 PM about the 1992 Mercedes-Benz 400-Class 4 Dr 400E Sedan

Question type: Maintenance & Repair

fuse 2 controls power windows, comfort module, a relay, wipers, sliding roof
switch from fuse 9 (always on) according to the manual.
When the key is on or off, i get low power to power side of fuse 2 in the fuse
box.. I removed/disconnected all components listed in manual for this fuse and
still have low power to the "hot side" whether fuse is in or out

5 Answers

79,695

How low is the voltage? I would suspect the fuse or maybe there is corrosion which is causing resistance. Try replacing the fuse and check the old one for signs of corrosion.

I have replaced the fuse several times and have tried the fuses i took out of fuse 2 location and tested in other fuse locations and fuses are fine. Also checked contacts in fuse box where fuse sits and contacts are fine. I am new to wiring problems so I need to know if power to fuse comes from ignition switch when put in on position and then goes though fuse to components. If so, power would be low coming through ignition switch, correct?

by the way, power is little over 3 volts

79,695

Are you checking the voltage at the fuse or somewhere else? If you are checking somewhere else down the line there may be a bad switch or a damaged wire or something else. Use your multi-meter to trace the problem.

checking at power side of fuse. replaced fuse several times and put fuses replaced in several other locations and fuses are fine. also checked connections on fuse block and they are fine. does the power side of fuse come from ignition switch? if so, if i remove fuse and get low voltage, which i have done, that would indicate bad wiring or connection from ignition switch, correct?

Your Answer

400-Class

Looking for a Used 400-Class in your area?

CarGurus has thousands of nationwide listings and the tools to find you a great deal.

Postal Code:

Mercedes-Benz 400-Class Experts

  • #1
    BoholMark
    Reputation
    30
  • #2
    CoachJones
    Reputation
    20
  • #2
    Tom Demyan
    Reputation
    20
View All

Related Models For Sale

Used Mercedes-Benz C-Class
132 Great Deals out of 1,370 listings starting at $3,000
Used Mercedes-Benz SL-Class
5 Great Deals out of 99 listings starting at $16,500
Used BMW 5 Series
37 Great Deals out of 538 listings starting at $3,980
Used Ford F-150
529 Great Deals out of 10,089 listings starting at $1,500

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.