Power to instrument cluster

[Usnguenther23]

1971 Plymouth Satellite. Could be simple but no gauges besides the ampmeter are working. What gives power to these gauges is it a wire on the circular circuit connector?

 

[Nacho-RT74]

blue wire with white trace ( 6 O'clock position ) is the source coming from RUN circuit and feeds the oil and brake lights same as the Voltage limiter which feeds the gauges.

If you have the oil and brake lights on cluster lighting up as soon you put the key in RUN but no gauges working, you can get some voltage limiter issue, because cluster is getting power.

 

[Usnguenther23]

blue wire with white trace ( 6 O'clock position ) is the source coming from RUN circuit and feeds the oil and brake lights same as the Voltage limiter which feeds the gauges.

If you have the oil and brake lights on cluster lighting up as soon you put the key in RUN but no gauges working, you can get some voltage limiter issue, because cluster is getting power.

I appreciate the help what I’m not understanding is where does the voltage limiter get it’s power is it a wire running directly to it from the fuse box?

 

[Nacho-RT74]

on 71s the power to cluster runs straight from the ign switch circuit so no fuse on the line. Since 72 the RUN circuit began to be fuse protected for the cab ( not for the engine bay ) because more accesories were sourced by this circuit, such as seatbelt warning system. So on your car the blue wire traced white is being sourced straight from ign switch on a splice down the harness tape. Once this wire gets the PCB, is spreaded to the cluster warning lights AND voltage limiter by the copper track on PCB.

That is at least what is shown on 71 diagrams. Can't tell if 71s got a change on half way of the production. On your car you must have a 10 fuse cavities but just 9 being used. The empty cavity ( one of the top ones ) was used on laters for this feed. So if your car got 9 fuses your cluster is not fuse protected

 

[Usnguenther23]

on 71s the power to cluster runs straight from the ign switch circuit so no fuse on the line. Since 72 the RUN circuit began to be fuse protected for the cab ( not for the engine bay ) because more accesories were sourced by this circuit, such as seatbelt warning system. So on your car the blue wire traced white is being sourced straight from ign switch on a splice down the harness tape. Once this wire gets the PCB, is spreaded to the cluster warning lights AND voltage limiter by the copper track on PCB.

That is at least what is shown on 71 diagrams. Can't tell if 71s got a change on half way of the production. On your car you must have a 10 fuse cavities but just 9 being used. The empty cavity ( one of the top ones ) was used on laters for this feed. So if your car got 9 fuses your cluster is not fuse protected

Figured out the temp gauge with this info just need the fuel now thank you

 

[Nacho-RT74]

fuel gauge gets same positive source than temp gauge. They are both sourced by the voltage limiter. All Mopar gauges ( but ammeter which gets its own life appart from the rest ) are feeded from 5 volts coming from Voltage limiter.

then each one gets its own variable negative source from its own sender. Fuel is solid blue wire ( no traced ), temp is violet