my memory tells me the yellow plastic part is original, the white one looks alien.
my oil gauge was showing zero at idle. had a garage to measure it, told me its normal and I plainly bent the metal blade to show bit more, since was unnerving to see zero.
surely, an aftermarket gauge is the answer.
as for voltage, the fuel or temp gauge has built in it a voltage convertor from 12v to 7v.
I am not sure if the pressure one shares 7 v or not, but fuel and temp run on 7.
the convertor oxidise or freaks out and generates spikes.
search the 60 side of forum for temperature spike.
hope this helps.
my oil gauge was showing zero at idle. had a garage to measure it, told me its normal and I plainly bent the metal blade to show bit more, since was unnerving to see zero.
surely, an aftermarket gauge is the answer.
as for voltage, the fuel or temp gauge has built in it a voltage convertor from 12v to 7v.
I am not sure if the pressure one shares 7 v or not, but fuel and temp run on 7.
the convertor oxidise or freaks out and generates spikes.
search the 60 side of forum for temperature spike.
hope this helps.