Gauge Problem

[grimes]

On my 78 D150 my gas gauge, oil pressure and temp gauge all peg out when I start the truck. They all use to work perfectly except the gas gauge was very erratic until this happened and how it says I am over full. Does anyone have any idea where to start looking? If it were a fuse they wouldn't work at all. There is a voltage limiter on the A,B, and E body's, is there one on these trucks? Its my daily driver so I cant start doing exploratory surgery. Thanks for any help.

Robert Grimes

 

[Bob Cain]

There should be a voltage regulator that plugs into the Cluster pc board metal rectangle prominently 1/2" X1 1/4" my 79 D100 has good luck
BC