Chevrolet Instrument Cluster Grounds

[169indy]

Adding a Tech Note related to Pre 1969 Instrument Cluster Grounds.

Many here understand that to aid vehicle manufacturing Chevrolet used a integrated Instrument panel grounding metal strap that was meant to install quickly and provide the cluster grounding via contact by virtue of the panel screw compressing the strap to the (J-nut) clip nut and dash - body structure.

During prolonged Storage (Rust & Corrosion), & Restorations (Primer & Topcoats) the Metal to metal paths become compromised, both partially or fully.

I just experienced this exact challenge: 1968 Camaro, Stored for Decades then Blasted and primed and top coated. I installed my TIC-toK-tACH 68 Cluster & Bam Funky Turn indicators when Lights in Park or Full on position. I installed a quick bypass ground of the housing- Instantly corrected. Out the Cluster came & I installed a permanent black ground wire from a cluster screw to dash structure. Problem Solved
You can Purchase the Jumper if you cannot Manufacture your own via American Auto wire:
Part Number: 20460

I will not Debate the Actual Dates of the engineering "FIX" being Listed in the AIM & When it was really invoked by production at a variety of lines (i.e. plants).
For Camaro (68) UPC 12 B2 View "A" dtd 2-22-1968

Also You might have a Cluster that acts up or is just fine. Floating Grounds/Intermittent Grounds/Partial Grounds ALL play into the electrical 'Gremlins' that Plague these old Chevy's.


There is a Chevrolet Technical Service Bulletin # TSB-68-12 found Here. (*Thanks CRG!)
http://www.camaros.org/images/doc/TSB_68-T-12.pdf

Photos various-