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1. 

   Speedometer wiring 74 FJ40

   If it wasn't clear that those thick wires went to the +/- studs on the ammeter, then maybe its worth pointing out that the White wire is connected directly to the battery, and the White blue feeds almost everything on the truck, so both have the potential to cause big problems if they fall off...

   • Words: 95
   • 45Dougal
   • Post #11
   • Apr 2, 2023
   • Forum: 40- / 55-Series Tech
2. 

   Speedometer wiring 74 FJ40

   White is + according to my diagram, but if they're the wrong way around then your gauge will just be backwards. Green White I'm guessing is the extra US connection to the indicators? For the extra effort, it's worth properly insulating those screw terminals while you have it off. It's easy to...

   • Words: 57
   • 45Dougal
   • Post #2
   • Apr 1, 2023
   • Forum: 40- / 55-Series Tech