|
|
|
#1
|
|||
|
|||
W126 Fuel Gauge & Temp Gauge
I've got a 1991 560SEL. My temp guage and fuel guage are sometimes erratic. My instrument cluster lights would go out every once in a while too. The other day, my speedo quit, (34 miles short of 200K!) so I pulled the instrument cluster to make sure everything was connected. There's a little green wire with round black connector alongside the main wire going to the speedo (I think) which may have been disconnected at the harness end. I disconnected everything and reconnected everything back up. I did not miss any.
Now, my fuel gauge and temp gauge both go all the way up as soon as I turn on the car, I've got no instrument lights and the speedo is still dead. It's a little tough to tell how much gas I've got left! I checked fuses. Does anyone have any ideas where to start? I'd like to at least get the fuel gauge fixed! |
#2
|
||||
|
||||
I would check the ground wires. They are brown and connect to a bolt behind the cluster.
__________________
"I have no convictions ... I blow with the wind, and the prevailing wind happens to be from Vichy" Current Monika '74 450 SL BrownHilda '79 280SL FoxyCleopatra '99 Chevy Suburban Scarlett 2014 Jeep Cherokee Krystal 2004 Volvo S60 Gone '74 Jeep CJ5 '97 Jeep ZJ Laredo Rudolf ‘86 300SDL Bruno '81 300SD Fritzi '84 BMW '92 Subaru '96 Impala SS '71 Buick GS conv '67 GTO conv '63 Corvair conv '57 Nomad |
#3
|
|||
|
|||
Ok, so I checked ground wires. Everything seems fine. I search instrument cluster problems again and saw a thread that mentions that the fuel gauge and temp gauge use the same ground. Someone else suggested adding a completely separate ground wire to the cluster. I did this and viola! the guages came back. Still no instrument lights or speedo. I'm thinking I disturbed a lead on the back of the light switch itself. As far as the speedo is concerned, I guess I gotta look further.
|
#4
|
||||
|
||||
Something like this happened to me a few months back. I removed the cluster to change bulbs out and when I put it back my gauges went crazy. The fuel and temp maxed out and the oil pressure didn't work. I was told to get small alligator clips and put them on the back of the cluster( I put them on some studs behind the gauges) and then hook them to the main grounds. That cured the problem. Eventually, I took the leads off and didn't need them anymore. I'm not sure what happened originally and why the problem fixed itself though.
__________________
1984 300SD Orient Red/ Palomino 1989 560SEC 2016 Mazda 6 6 speed manual 1995 Ford F-150 reg cab 4.9 5speed manual |
#5
|
|||
|
|||
Pretty much exactly what I did. Three small studs with nuts poking out on the fuel gauge end in the back of the instrument cluster. I attached a wire to one and attached the other end to the main ground wires behind the cluster. That brought back the two gauges.
|
#6
|
|||
|
|||
The spedo on the w126 are electric and I believe there is a sensor on the rear of the transmission that sends the signal. maybe the wire or connector is loose.
Charlie
__________________
there were three HP ratings on the OM616... 1) Not much power 2) Even less power 3) Not nearly enough power!! 240D w/auto Anyone that thinks a 240D is slow drives too fast. 80 240D Naturally Exasperated, 4-Spd 388k DD 150mph spedo 3:58 Diff We are advised to NOT judge ALL Muslims by the actions of a few lunatics, but we are encouraged to judge ALL gun owners by the actions of a few lunatics. Funny how that works |
#7
|
|||
|
|||
those three nuts - do you think each one is the earth for the temp gauge, oil pressure and water temp? thanks for a reply .
MJ |
Bookmarks |
|
|