420 SEl instrument cluster out! - PeachParts Mercedes-Benz Forum

foamy · #1 01-21-2012, 10:33 AM

Hello out there!
The instrument cluster went out on my 90' 420 SEL. I started the car a few weeks ago and the fuel, temp, oil pres and speedometer were all dead. I pulled all the fuses to make sure they were not blown and making good contact and the instrument cluster started working again. This time it is out for good. I Did the same thing with the fuses and nothing, and now, my brake lights are out as well. All fuses are ok...Any thoughts would be kindly appreciated.

Thanks

NJ300sdl · #2 01-21-2012, 07:09 PM

OVP or OVP fuse may be the problem.

foamy · #3 01-21-2012, 07:45 PM

Thanks NJ300. Where is the relay located so I can check the fuse? 90 420 SEL.

LandYaghtLover · #4 01-21-2012, 08:17 PM

Its may be near the brake booster (inboard) on the back firewall. Small cover, mine is clear. Uses a "U.S." style fuse. 10 amps ONLY.

foamy · #5 01-21-2012, 09:54 PM

Thanks LYL I will check it out tomorrow

foamy · #6 01-25-2012, 04:05 PM

Hi Lyl, I checked the fuse and it is ok. I was thinking it could be the OVP relay but wouldn't the fuse have blown if there was any problem in the circuitry? Any other suggestions would be appreciated.

Thanks

LandYaghtLover · #7 01-25-2012, 11:12 PM

Could be any number of things. I am not sure about the OVP relay being the problem, but they can go bad. Maybe take yours apart and decide if you want to refresh it. I re-soldered mine, it was pretty bad.