trying to figure out guage for trim,, on the dash their is a guage for tilt and/trim along with tach,fuel,volts,and temp.. I cleaned and repaired some of the wires mostly corroded grounds to the other guages and they are working fine, The tilt and trim work great from the controll switch on the shifter but no movement at all at the guage. I noticed from under the dash their is a black wire and a white wire that come from the rear of the guage to the top of the dash have no idea what they are for but def come from the back of the trim guage ??? Only guage can`t get working would like to repair it ..new to boating the guages are on a 19' baja with a 140 johnson. has been stored for quite sometime and trying to get her ready.. Thanks Bill