Rallye dash not working

[Old B5]

I am currently restoring a 1970 Challenger with rallye gauges. None of the gauges are working. I am pretty sure it is wired correctly. Could it be a resistor? If so which one? Improper ground? Any other suggestions? I am a complete novice when it comes to electrical components. Electrical is my biggest weakness when working on cars.

 

[moparleo]

Videos

E-Body "How-To" Videos about restoring your Cuda or Challenger: If your browser blocks "pop ups", please visit this YouTube channel to view the Videos: E-Bodies.org Videos Written Restoration Tips: Step by Step "How-To" Articles < Back to “Resource Library”

www.e-bodies.org

 

[Chryco Psycho]

There is a voltage regulator that drops the voltage down to 5v / pulsing test to see if you have a pulsing voltage inot the gauges fed by the regulator first , there is a solid state 5v replacement available .

 

[marks ebody]

Can you upload pictures of the wiring on the back of the instrument Cluster

 

[Challenger RTA]

Can you upload pictures of the wiring on the back of the instrument Cl

This is how it should be.

 

[Old B5]

Thanks Challenger RTA. I have some days off work later in the week and will pull the cluster and take a look.

 

[Challenger RTA]

When you inspect the back of cluster obsessive the strips of fiber.They are an insulator. If broke or cracked it will short out. Be careful not to break.

 

[PlymDodGeorge]

I had a similar issue. Checked all the difficult stuff first. From time to time I would lose signal lights etc. along with gauges. Turned out to be a corroded fuse holder. Clean holders, check fuses, then dab dielectric grease on the holder prongs. Have a look at the simple things first. Good luck.