Have had no problems with the wiring specialties or the tweek harnesses, have had problems with many Chase bays including one for a Honda which is the easiest harnesses in the world to make work, unless you forget to put in the power harness and install the wrong size pins in the ecu plug which is what they did.
Try figuring that one out, every thing pins out correctly, but nine of the pins in the plug make physical contact with the ecu only took about a month to figure out lol if you plan on buying a Chase bays harness send you your money Ti me and I will send you the stock harness out of my neighbors 93 Chevy astro van, it may not look nice buy will work just as well as the Chase bays
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