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Full Version: FMX Transmission - reverselights not working A little Troubleshooting
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I had a problem with not working reverse lights on my `69 Mach1.
A long time searching and swearing revealed that there were 3 errors responsible.
I hope my little how to helps other users:
1. Wrong bulbs installed.
Below is a picture of the wrong and the right ones.

2. The cable was drilled into below the door sill
When bridging the black/red contacts on the wiring harness from the car every time the fuse for turn signals and heaterswitch flew.

3. The copper plate for Reverse in the neutral safety switch was worn and the whole Switch was dirty
This repair was not so easy. After removing Center console, shift lever and selector, I had to carefully disassemble the switch still installed. Cleaned the switch and copper plates, assemble and adjust again, just as it says on the label and reassemble the whole thing in reverse order.
Since my switch is from a later model, it has 3 copper plates, one of which is not used in a `69. So I changed the plates as you can see on the picture below.
Closing the switch was not easy, but after I had bent the metal tabs, all copper plates had contact and finally the reverse light and the neutral do as they should.

Biggrin
Greetings
Harry
Wow, not just one but three problems. No doubt that took some patience (knowing the end product justified the headaches).

Thanks for sharing the information for others who travel the same path.

One more step to complete enjoyment of the Mach 1! Priceless.

P.S. Thank you for also sharing with pictures.
I had problems in the same switch. I 'carefully' broke the metal tabs on one connector while doing the repair on the daughter's '70. SSig_help
I took the parts to a watch maker (not a bloke who changes batteries in the mall) and had him make a replacement part. I had used the person before to repair a 'dealer only' keyring I was given so I knew his work. SSig_goodjob2
Got a 'Rolls Royce' quality part back - fitted and worked first time.
Also saved me from a minor case of death...... (gotta love kids) Icon_tongue