HZ dash gauges problem

[Maxy]

all my HZ gauges aren't working and have done basic test at senders... is there a resistor in back of gauge cluster that can be a problem?

 

[the_boozer]

the dash regulator is probably burnt out, it turns 12 volt into 8? for the gauges. might be 5 volt cant remember.
Its marked what it is on the HZ drawing Id post that but I gave that book away years ago

 

[07GTS]

yea they have a 5v reg for the gauges, when it fails it pumps out full volts to the gauges and if they are at a lower ohms it frys them, they can be rewound and calibrated and elec reg fitted so it dosnt happen again