#1  
Old 10-20-2021, 08:02 PM
michael j michael j is offline
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Location: SOUTH EASTREN OHIO
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Default 74 trans am 455 tac wire color codes

I have a 74 trans am 455. My msd box took a dump, now hooking up for regular wiring. Tachometer does not work, looking for wire colors to reinstall back normal. Can’t seems to find any loose ends. Any help would be helpful. Thanks.

  #2  
Old 10-20-2021, 11:41 PM
Aus78Formula Aus78Formula is offline
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PM your email. I have a 1974 wiring diagram but in PDF form so can't attach via Flickr etc.

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Old 10-24-2021, 03:05 AM
Aus78Formula Aus78Formula is offline
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I guess he didn't need it after all. I'll delete it from my phone then.

  #4  
Old 10-24-2021, 09:50 AM
78w72 78w72 is offline
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he hasnt been back on here since he posted this....

heres a pic showing the colors of the tach harness wires, should be a brown wire connected to the tach terminal of the dist that passes through a grommet in the firewall, then connects to the power terminal on the fuse box with a red or pink wire with black stripe that connects to the 2 prong terminal on the tach.
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