Gauges dim when dimmer rolled up

[boydsdodge]

Hello, 1968 Charger, I rebuild the cluster,used an RTE voltage limiter, all looks great,
gauges all reading as should. Turn on the lights and watch the gauges all drop in unison, if I roll the dimmer to off position the gauges all rise to correct reading.
If I roll the dimmer up to brighten gauge cluster lights the gauges drop.
Has anyone seen this?
If so do you have a repair or a path you can direct me down?
Thanks.

[Ghoste]

I haven't seen it in an old Dodge but I did see it once in an old Jeep.  I think your dimmer might have alot of corrosion on the rheostat portion.

[cdr]

sounds like the cluster is not grounded good. paint on mounting points make for a bad ground

[A383Wing]

yea...you lost a ground somewhere...maybe a loose pin on circuit board also

[boydsdodge]

I'll give the grounding another shot.
I had thought it might be a ground earlier and made a strap from the cluster housing to Firewall.
For the switch I tried a second one and had same results but it was an older worn switch.
I will give it another shot in the morn.
Thanks

[cdr]

if the circuit board in not getting a good ground on the housing that could be the problem.

[cdr]

the screw i have circled should be the ground,,but i am not 100 % if that is the right one.

[boydsdodge]

I'll give that a look.
Thanks for tip