Need some help here. My Guages have a mind of their own.

Everything has been fine with all my gauges and all working well. I started the 87 300TD after a Mercedes meet-up in Chapel Hill today to find all my needle pegged DOWN when the car is running. Then I noticed when I took my foot off the brake pedal all the needle popped up. Brake pedal down needles fall.....all the way home

The thing is that when the needle goes back up when I release the brake, including the rpms, they are not gong to the right spot. oil pessure goes to 1 bar, water temp very low and RPM guage sometimes stays down.

Not sure if any of you have heard of this happening? It's got to be an electrial issues, or ground, but how and from where?? Soooo strange!!

I looked under the hood and did not see any loose wires or wires touching metal.....
HELP PLEASE - I hate electrical issues!!

__________________

1987 300TD 147,000 miles- Palomino leather interior, 1995 facelift and body cladding, E350 wheels, Rebuilt suspension and sport springs, rebuilt turbo, New Monarch injection pump and injectors....and the list goes on and on...

Sounds like a bad earth to the instruments or OVP relay problems.

__________________
Grumpy Old Diesel Owners Club group

I no longer question authority, I annoy authority. More effect, less effort....

1967 230-6 auto parts car. rust bucket.
1980 300D now parts car 800k miles
1984 300D 500k miles
1987 250td 160k miles English import
2001 jeep turbo diesel 130k miles
1998 jeep tdi ~ followed me home. Needs a turbo.
1968 Ford F750 truck. 6-354 diesel conversion.
Other toys ~J.D.,Cat & GM ~ mainly earth moving

Been looking and looking, but can't figure it out. Would a corroded or cracked fuse do this??
Bump

__________________

1987 300TD 147,000 miles- Palomino leather interior, 1995 facelift and body cladding, E350 wheels, Rebuilt suspension and sport springs, rebuilt turbo, New Monarch injection pump and injectors....and the list goes on and on...