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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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| | | by 47 BOMBER | | 47 BOMBER |
I bought a speedway 12 circuit wire harness for my 1947 3100. That came without the original harness no wires at all. I been studying the wiring diagram for the truck and the instructions for the harness. I can see a few wires go to the ammeter. On the universal harness, it doesn’t have wires labeled ammeter. In the instructions it shows a gauge with volts powered by a gauge power wire and grounded. I want to use the original gauges and instruments in the dash.
When installing a universal harness what issues can I expect? Will I be able to wire it like the original wire harness.
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| | | by bartamos | | bartamos | So what about a ballast resistor? Did you get an internally resisted coil or externally resisted coil? FYI, you are missing questions already asked.
The links are from Tim and were appreciated.
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